Extrusion process of aluminum bar temperature on the surface of the material has what effect

Aluminum alloy industry in the most widely used class of non-ferrous metal structural materials, with a large number of applications in aviation, aerospace, automotive, machinery manufacturing, shipbuilding and chemical industries. With the rapid development of science and technology in recent years, as well as the growing demand for aluminum alloy welding structure of the industrial economy, aluminum alloy welding, will also be an in-depth study. Aluminum alloy is widely used to promote the development of aluminum alloy welding technology and promote the application of aluminum alloy welding technology, aluminum alloy welding technology is becoming one of the hot spots of research. Pure aluminum (ρ = 2.7g/m3), the density is about 1/3 of the iron, low melting point (660 ℃), aluminum is face-centered cubic structure, so it has high plasticity (δ: from 32 to 40%, ψ: 70?90%), easy to process, and can be made into a variety of profiles, sheet metal. Good corrosion resistance is very low, but the strength of pure aluminum, the tensile strength in annealed condition and the value of about 8kgf/mm2, it is not suitable for structural materials. Production, through long-term practice and scientific experiments, people gradually added alloying elements and heat treatment to strengthen aluminum, which has been a series of aluminum alloys used. Add certain elements to form an alloy, while maintaining the advantages of pure aluminum light weight, but also has a high strength, strength tensile strength and value of up to 24?60kgf/mm2 respectively. this makes a lot more than alloy structural steel, the ideal structural material, widely used in machinery, transport machinery, power machinery and aviation, aircraft fuselage, skin, compressor ratio strength (strength and ratio of the). Ratio ΣB/ρ) is better, etc. are often made of aluminum alloy to reduce weight. Aluminum alloys can reduce the weight of the structure by more than 50% by replacing the welded steel plate material. Low-density aluminum alloy, but the strength is relatively high, close to or exceeding the high quality of steel, plastic, and can be processed into a variety of profiles, and has excellent electrical conductivity, thermal conductivity and corrosion resistance, is widely used in industry, the use of the second steel. Aluminum is divided into two main categories: cast aluminum alloy, forged aluminum alloy casting, can withstand pressure processing. Being processed into various forms to make aluminum alloy material specifications. Mainly used in the manufacture of aviation equipment, building doors and windows. Aluminum alloy processing methods can be divided into deformed aluminum alloy and cast aluminum alloy. Deformed aluminum alloy is divided into non-heat strengthened aluminum alloy and enhanced heat treatable aluminum alloy. Non-thermal reinforcement does not improve mechanical properties through heat treatment, but only through cold deformation, mainly including high-purity aluminum, industrial high-purity aluminum, industrial aluminum and rust-resistant aluminum reinforcement. Heat-treatable reinforced aluminum alloys are heat-treated by quenching and aging to improve mechanical properties, and it can be divided into duralumin, forged aluminum, super duralumin and special aluminum alloys. Some of the aluminum alloys can also be heat treated to obtain good mechanical properties, physical properties and corrosion resistance. The chemical composition of cast aluminum alloys can be divided into Compounds can be divided into Al-Si alloys, aluminum - copper alloys, aluminum - magnesium alloys, aluminum - zinc alloys and aluminum rare earth alloys Al-Si alloys have simple aluminum - silicon alloys (not heat-treated to strengthen the mechanical properties of the lower, casting performance is good), special aluminum - silicon alloys (can be heat-treated to strengthen the mechanical properties of the high casting properties, good performance)

Torch

2008 Beijing Olympic torch "Xiangyun" for the aluminum.

Edit pure aluminum products

? Pure aluminum smelting products and pressure processing two categories. The former chemical composition of Al the latter in the pinyin LV (aluminum, industrial) said.

Aircraft

Various aerospace aluminum alloys as the main structural material. Aluminum alloys are made into the skin, beams, ribs, trusses, bulkheads and landing gear of aircraft. Depending on the purpose of the aircraft, the amount of aluminum is different. Focusing on civil aircraft aluminum alloy cheap widely used aluminum alloy, such as the Boeing 767 fuselage structure weight of about 81% of the economic benefits. Due to the military aircraft to good business performance relative to reduce the amount of aluminum, such as the maximum flight speed of Mach 2.5 F-15 high-performance fighter, only 35.5% of the aluminum alloy some very good low-temperature performance of aluminum alloy -183?-253 [ 2 ℃ is not cold embrittlement, liquid hydrogen and liquid oxygen environment, it can not afford the chemical reaction with concentrated nitric acid and meta-methyl hydrazine, weldability, so It is a good material for making liquid rockets. Launch "Apollo" spacecraft "Saturn" 5 launch vehicle stages of fuel tanks, oxidizer tanks, fuel tanks during class time, tail section and equipment compartments made of aluminum alloy. The crew cabin of the Space Shuttle, the forward fuselage, the middle fuselage, the aft fuselage, the vertical tail, the flaps, the ailerons and the horizontal tail are made of aluminum alloys. The main structural material of artificial Earth satellites and space probes is aluminum alloy

Edit Process of forging to repair damage

? Repairing damage to aluminum alloys is an important part of the forging process. Softer aluminum alloy at high temperatures, viscosity, poor fluidity, easy to stick to the mold to produce a variety of surface defects (folding, burrs, cracks, etc.) in the process, it must be polished, repair the damage, remove the surface defects cleanly, or in the subsequent process of defects will be further expanded, and even cause forging scrap. Repair damage tools, pneumatic grinding machine, pneumatic cutting machine, small electric cutting machine and flat shovel. Before repairing the damage to identify the defective part by corrosion, repair the wound is a smooth transition, its width should be 5 to 10 times the depth.

Edited section of pressure machining aluminum alloy

? Aluminum alloy pressure machining products are divided into rust (LF), hard (LY), forging (LD), super-hard (LC), cladding (LB), special (LT) and brazing (LQ) and other seven categories. Commonly used aluminum alloy materials in the state of annealed (M annealed), hardened (Y), hot rolled (R) 3.

Edit Aluminum

? Aluminum and aluminum alloy materials processed into certain shapes, collectively, aluminum, sheets, strips, foils, tubes, bars, wires, profiles.

Edit this paragraph Aluminum alloy plate

1 Aluminum composite plate

? Aluminum-plastic composite panels aluminum-manganese alloy surface with coated paint 3003, 5005 aluminum-magnesium alloy panels as a series of treatments after the surface of a new type of material made of composite materials with a polymer adhesive film of the core layer of PE plastic as a treatment. It retains the main characteristics of the original material of the composite (aluminum alloy plates of non-metallic polyethylene) of plastic, while also overcoming the lack of the original material of the composite, thus obtaining a large number of excellent material properties. Product features: colorful decoration, weather resistance, corrosion resistance, battering, fire, moisture, sound insulation, heat insulation, impact resistance, light weight, easy processing and molding, easy handling and installation features. Aluminum composite panel specifications: Thickness: 3mm, 4mm, 6mm, 8mm Width: 1220mm, 1500mm Length: 1000mm, 2440 for 3000mm, 6000mm Aluminum composite panel standard size: 1220*2440 Aluminum composite panel Usage: Can be used for curtain wall, internal and external decoration of the halls, hotels, stores, meeting rooms, etc., also can be used for remodeling of the old building As a counter, surface layer for furniture, vehicles, interior and exterior walls.

2 aluminum veneer

? Aluminum veneer processing high quality aluminum alloy with world famous companies, as well as surface coating PPG, or Akzo PVDF fluorocarbon coating fine aluminum veneer panels, reinforced skeleton, lugs, etc.. Aluminum veneer features: light weight, good rigidity, high strength, non-flammability and fire resistance, good workmanship, color options, excellent decorative effect, easy to recycle and environmental protection. Aluminum veneer applications: architectural curtain walls, columns and beams, balconies, partition cladding, interior decoration, advertising signs, vehicles, furniture, booths, instrument housings, subway marine tools.

3 Aluminum honeycomb panels

? The use of composite materials honeycomb structure, the selection of high-quality 3003H24 aluminum alloy, or 5052AH14 high manganese alloy aluminum aluminum honeycomb panels as the substrate, hot pressing and aluminum honeycomb core composite molding. Aluminum honeycomb panel panel materials, shapes, seams, mounting systems to colors, surface treatments for architects to provide a wealth of choices, showing people a wealth of roof performance, excellent design freedom. This is a new material that is easy to construct, the overall performance is satisfactory, and the heat preservation effect is remarkable, and its superior performance attracts people's attention. There are no standard size aluminum honeycomb panels, according to the design drawings, customized by the factory for all the worksheets, widely used in building facades (especially suitable for high-rise buildings) indoor ceilings, partitions, doors, thermal insulation compartments, billboards field. The product will be green, environmentally friendly, energy-saving building materials in the Chinese market's new momentum.

Aluminum honeycomb perforated acoustic ceiling panels

? Aluminum honeycomb perforated acoustic ceiling perforated aluminum panels with perforated backsplash construction of the structure, relying on high-quality adhesives and acoustic fabrics with aluminum honeycomb core directly bonded to the aluminum honeycomb sandwich structure, honeycomb core panels and backsplash paste the layers of aluminum honeycomb core. Due to the aluminum honeycomb, the honeycomb core is divided into a large number of closed chambers to prevent air flow, allowing acoustic obstruction, improved absorption coefficients (above 0.9), and at the same time increasing the strength of the sheet so that the size of the single piece of the sheet can be made larger, further increasing the degree of freedom of design. Indoor acoustic design, design different perforation rate, and control the sound absorption coefficient within a certain range of the complex structure, both to meet the design effect can be reasonable cost control. Control the perforation diameter, spacing, according to customer requirements perforation rate maximum perforation rate <30%, generally used aperture ∮2.0, #2.5, #3.0 specification requirements of the back panel perforated plate, sound absorbing cloth using quality sound absorbing materials, such as non-woven fabrics. More than the standard applies to the subway, theaters, radio, television, textile factories and noise of the plant and stadiums and other large public **** building sound-absorbing wall panels, ceiling panels.

Edit cast aluminum alloy

? Cast aluminum alloy (ZL) other than the elements aluminum, copper, magnesium, zinc, silicon composition is divided into four categories, the symbols coded 100, 200, 300, 400. in order to obtain high-quality precision castings cast aluminum alloy of various shapes and specifications generally have the following characteristics. (1) fill the slots in the slit part of the good mobility, (2) has a lower melting point than the general metal, but can meet the requirements of a large part of the (3) good thermal conductivity, the heat of molten aluminum can be quickly transferred to the mold short casting cycle (4) in the melt of hydrogen, and other harmful gases in the treatment (5) can be effectively controlled by the casting of aluminum alloys, there is no thermal brittle cracking Tendency to be torn (6) good chemical stability, resistance to erosion (7) is not prone to surface defects, has a good surface finish and gloss, and easy surface treatment (8) casting aluminum alloy processing performance, available difficult to change the mold, the original sand casting surface investment and dry sand casting gypsum casting casting production can also be used in vacuum casting, low-pressure and high-pressure casting, squeeze casting, semi-solid casting Centrifugal casting method of molding production for different purposes, different varieties and specifications, different properties of various castings. Cast aluminum alloy is widely used in automobiles, such as engine cylinder heads, intake manifolds, pistons, wheel hubs, power steering housing.

Edit high strength aluminum alloy

? High-strength aluminum alloy, its tensile strength greater than 480 MPa aluminum alloy pressure processing aluminum alloy rustproof aluminum alloy class, hard aluminum alloy class, super hard aluminum alloy class, forging aluminum alloy class, aluminum lithium alloy class.

Edit Aluminum alloy bug fix

? Aluminum alloy is prone to casting defects of shrinkage, trachoma, porosity and slag entrapment in the production process. How to repair aluminum alloy casting defects such as porosity? Welding, TIG welding equipment repair, due to the heat capacity, prone to side effects, such as thermal deformation is small, can not meet the requirements of the repair welding. Cold welding repair machine is the use of high-frequency spark spark, no heat stack welding principle to repair casting defects. Cold welding heat-affected zone, will not cause annealing deformation of the substrate, no cracks, no hard point hardening phenomenon. High fusion strength, the patch material and the substrate melted, then solidified, combined with a solid, grinding, milling, filing, processing, dense and not off. Cold welding repair machine is the ideal way to repair aluminum porosity, trachoma and other small defects.

Edit Different grades of aluminum alloys Typical use classification of aluminum alloys

? Aluminum alloys: 1000 series aluminum alloys, 1050, 1060, 1100 series represent a range of classifications. In all series 1000 series is a series of aluminum content. The purity can reach more than 99.00%. The production process, since they do not contain other technical elements, is relatively simple and relatively inexpensive, and is the series most commonly used in conventional industry. Most of the 1050 and 1060 series on the circulating market. 1000 series aluminum plate according to the last two Arabic numerals to determine the series, such as 1050 series, the minimum aluminum content in the last two Arabic numerals according to the international naming of the 50 grades, the aluminum content must be greater than 99.5% of the party for qualified products. Also clearly stipulated in China's aluminum alloy technical standards (gB/T3880-2006), is 1050 aluminum content of 99.5%, the same reason 1060 series aluminum plate aluminum content of 99.6%. Two product lines: 2000 series aluminum alloy represents 2024,2 A16 (LY16), 2A02 (LY6). 2000 series aluminum plate by high hardness is characterized by, which the highest copper content initially, probably around 3-5%. 2000 series aluminum bar belongs to the aviation aluminum, in the traditional industrial applications are rare. 3000 series aluminum alloy represented by three lines: 3003, 3A21 mainly. China's 3000 series aluminum production process is even better. Manganese as the main component of 3000 series aluminum bar. Between 1.0-1.5, with a better series content of anti-rust function. Four series: 4000 series aluminum bar represented as A 4A01 4000 series aluminum plate belongs to a series of high silicon content. Usually silicon content of 4.5-6.0%. The case of building materials, mechanical parts, forging materials, welding materials, five lines of low melting point, good corrosion resistance Product Description: heat-resistant, wear-resistant features: 5000 series aluminum alloy represented by 5052,5005,5083 5 A05 series. 5000 series aluminum bar is more commonly used aluminum alloy series, the main element is magnesium, magnesium content in the range of 3-5%. Also known as aluminum-magnesium alloy. Low density, high tensile strength, high elongation are the main characteristics. Low weight ratio of aluminum-magnesium alloys in the same region as other series. Traditional industrial applications are more widespread. In our 5000 series aluminum plates belong to one of the more mature aluminum plate series. Six Sectors: 6000 Series represents 6061 aluminum alloy containing both magnesium and silicon, which focuses on the 4000 Series and 5000 Series 6061 is a cold-treated aluminum forging product suitable for corrosion resistance and high oxidation advantages. Can be used for painting workability is good, easy. Seven rows: 7000 series aluminum alloys represent 7075 contain mainly zinc. Also belongs to the aerospace series, aluminum - magnesium alloy, zinc and copper, and is heat-treatable alloy, is a super-hard alloy, good wear resistance. Basically rely on imports, China's production process has to be improved. Eight lines: for 8011 belongs to other series, most applications for aluminum foil, aluminum rods in terms of less common 8000 series aluminum alloy. Nine series: 9000 series aluminum alloy alternate alloy. Typical uses of aluminum

1100 treatment of the typical use of the coil 1050 food, chemical, brewing and other industries use extrusion, various hoses, fireworks powder 1060 requires high corrosion resistance and forming occasions, but does not require the strength of chemical equipment need to have good formability and high corrosion resistance, but does not require high strength parts of the components, for example, chemicals, food industry devices and storage containers, sheet processing parts, deep-drawn or spun hollows, welded parts, heat exchangers, printing plates, signage, reflective devices 1145 Packaging and insulation foils, heat exchangers 1199 Electrolytic capacitor foils, optical reflective deposition films 1350 Wires, conductive chain buses, transformer strips 2011 Screws and applications that require good cutting and machining properties, processed products that require high strength and in 2014 hardness (including high temperatures) occasions. Aerospace weight, forgings, plates and extrusions, wheels with structural elements, multi-stage rockets first stage fuel tanks and spacecraft parts, frames and suspension parts 2017 is the first industrial application of 2XXX alloys in a narrow range of applications, major rivets, general purpose mechanical parts, structural and transportation structural parts, propellers and fittings 2024 aircraft structures, rivets, missile components, trucks Wheel hubs, propeller elements and other various structural parts 2036 Automobile body sheet metal 2048 2124 Aerospace structural parts Aerospace structural parts and weapons structural parts 2218 Aircraft engines and diesel engines piston aircraft engine cylinder heads, jet engine impellers and compressor rings 2219 Aerospace rockets welded oxidizers grooves, supersonic aircraft skin and structural parts for operating temperatures of -270? 270?300℃. Good weldability, high toughness, high resistance to stress corrosion cracking2319 weld pulling2219 alloy electrodes and filler solder2618 die forgings and free forgingsT8 condition. Piston aero-engine parts 2A01 structural rivets for operating temperatures less than or equal to 100°C 2A02 axial compressor blades for turbojet engines with operating temperatures of 200?300°C 2A06 aircraft structures with operating temperatures of 150?250°C and rivets for the strength of aircraft structures with operating temperatures of 125? 250°C 2A10 2A01 high alloys for the manufacture of rivets for the operating temperatures of Less than or equal to 100 ℃ rivets 2A11 medium strength structural members of aircraft, propeller blades, transportation means of aircraft structure and building structure members. 2A12 Aircraft skins for aircraft medium-strength bolts and rivets, spacer frames, wing ribs, wing beams, rivets, building and transportation structures 2A14 Complex shaped free forgings and drop-forged parts 2A16 Aircraft parts for aviation aircraft parts, welded containers hermetic compartments at room temperature and high temperatures 2A17 Aircraft parts for aircraft parts with operating temperatures of 225?250 ° C. 2A50 Complex shaped Parts of medium strength 2A60 aircraft engine compressor wheels, wind turbines, fans, impellers 2A70 aircraft skins, aircraft engine pistons wind turbines, roulette and other 2A80 aircraft engine compressor blades, impellers, pistons, piston rings and other high-temperature parts 2A90 aero-engine pistons 3003 for machining requires good forming properties, high resistance to weldability good part members These properties are needed for working with higher strength than 1XXX base alloys, handling and storage devices such as kitchen utensils, foodstuffs, chemical products, tanks and cans for transporting liquid products, 3004 aluminum cans and cans for sheet metal processing of all kinds of pressure vessels and piping, parts that require higher strength than 3003 alloys, equipment for the production and storage of chemical products, sheet metal processing of parts, architectural processing of parts, construction tools, and other lighting parts. Construction tools, a variety of lamps and lanterns parts 3105 room dividers, stalls, mobile home panels, gutters and downpipes, sheet metal forming 3A21 aircraft fuel tanks, machining parts, bottle caps, corks, petroleum pipelines, riveting line, construction materials, food and other industrial equipment, 5005 3003 alloy similar, with medium strength and good corrosion resistance. Used as conductors, cookware, instrument panels, shell structure decorative parts. Anodic oxide film than the coordination of 5050 sheet liner plate as coolers refrigerated trucks gas pipes, oil pipes and agricultural irrigation pipes on the oxide film of 3003 alloy and 6063 alloy tone brighter, but also can be processed slab 5052 this alloy tubes, rods, shaped material and line, molding performance, corrosion resistance, candles, fatigue strength and moderate static strength, used in the manufacture of aircraft fuel tanks, fuel lines, as well as transportation vehicles Ship 5056 sheet metal parts, instruments, street lamp brackets with rivets, hardware products, such as magnesium alloy cable sheath rivets, zippers, nails, etc.; clad aluminum wire is widely used in agricultural insect trap cover treatment, and need high corrosion resistance occasions 5083 applications, need high corrosion resistance, good weldability, and medium strength occasions, such as ships, automobiles, and aircraft sheet metal weldments that require strict fire prevention Pressure vessels, cooling devices, TV towers, drilling equipment, transportation equipment, missile parts, armor 5086 applications require high corrosion resistance, good weldability, and medium strength occasions, such as ships, automobiles, airplanes, cryogenic equipment, TV towers, drilling equipment, transportation equipment, 5154 Missile parts for decks welded structures, tanks, pressure vessels, ships and offshore structures, transportation Tanks 5182 table used for handling tank covers, automobile body panels, maneuvering panels, 5252 with reinforcing parts, brackets and other parts with high strength in the manufacture of decorative parts, such as automobiles and other decorative parts. Over 5356 Welding magnesium content of ? Hydrogen peroxide and other chemicals, containers greater than 3% Aluminum-Magnesium alloy rods and wires 5454 Welded structures, pressure vessels, piping for offshore installations 5456 Armor plate, anodized with a high gloss transparent oxide film for strength after anodizing 5254 Welded structures, storage tanks, pressure vessels, marine materials 5457 5652 Automotive and other equipment, polished and plated with decorative hydrogen peroxide and other chemicals Storage containers 5657 Polished and anodized decorative parts for automobiles and other equipment, provided that in any case it is ensured that the material has a fine grain structure 5A02 Aircraft fuel tanks and conduits, filaments, rivets, structural parts for ships 5A03 Medium-strength welded constructions, cold-stamped parts, welded containers, wires, which may be used in place of 5A02 Alloys 5A05-Welded Structural Parts, the Aircraft Skin Skeleton 5A06-Welded Structures, Cold Forged Parts, Parts for Containers Welded Tensile Aircraft Skin Skeleton Parts 5A12-Welded Structures, Bullet Proof Decks 6005-Extruded Profiles and Tubes, Used for Requirements of Strong, High Structural Components in 6063, such as Ladders, Television Antennas 6009-Body Plates 6010-Pieces: Automobile Bodies 6061 Requirements for a certain degree of strength, weldability, and corrosion resistance for a wide variety of industrial Structures, such as manufacturing trucks, tower construction, ship tubes, trams, fixtures, machine parts, precision machining 6063 construction profiles, rods, type, sheet metal, irrigation pipes, as well as vehicles, pedestals, furniture, fences extrusion materials 6066 forgings and welded structures 6070 heavy-duty welded extruded materials for the structure and the automotive industry's extruded materials and piping of the forging of the crankshaft parts, mechanical parts, production of rolled ring high-strength rod 6151 6101 Buses require both good plasticity properties, high strength, as well as conductive rods and wires 6205 6201 High-strength thick steel plates with good corrosion resistance and high impact resistance Extrusions 6262 Requirements for corrosion resistance than the 2011 and 2017 high-stress alloy extrusions 6351 Vehicle threads Structural parts, water, oil and other Pipelines6463 Construction with various pedals Appliance profiles, anodized, bright surface automotive decoration6A02 Aircraft engines7005 Extrusions, parts, complex shapes of forgings and drop-forged parts are manufactured with high strength but also high fracture toughness of welded structures, such as truss-rod containers for transportation vehicles; large sports equipment such as tennis racquets and baseball bats, cryogenic equipment and storage tanks, fire Pressure equipment, military equipment, armor in the manufacture, can also be used for heat exchangers, rather than components of the solution treatment after welding; 7039 reefer container plate, missile device 7049 has the same 7079-T6 alloy forging static strength and is required to have a high resistance to stress corrosion cracking of the parts of the battle, such as aircraft and missile parts - landing gear hydraulic cylinders and extruded parts. The fatigue properties of the parts are roughly equal to those of alloy 7075-T6, while the toughness is slightly higher than that of 7050 aircraft structural plates, extrusion molding, open-die forgings and drop-forged parts. Such requirements of the alloy manufacturing is: resistance to peeling corrosion, stress corrosion cracking, high fracture toughness and fatigue resistance, is 7072 air-conditioned aluminum foil with extra-thin strips; 2219,3003,3004,5?050,5052,5154, 6061 7075,7475,7178 alloy plate, tube cladding 7075 used in the manufacture of aircraft structures and futures require high strength, high fatigue properties. Corrosion resistance of high stress structural components, mold making 7175 for forging aircraft with high strength structure. T736 material has good overall performance, strength, resistance to spalling corrosion and stress corrosion cracking resistance, high fracture toughness, fatigue strength 7178 7475 with non-clad aluminum plate aluminum cladding used in the manufacture of aerospace compression produced by the high strength parts, wing skeleton, truss bar like. There are high strength and high toughness 7A04 aircraft skin parts, screws, as well as members, such as beam trusses, spacer frames, wing ribs, landing gear and so on.

Edit Aluminum and Aluminum Alloy Status Codes for Forging

1 Scope

This standard specifies the status codes for deformed aluminum alloys. This standard applies to aluminum and aluminum products.

2 basic principles

?2.1 base status, the code that begins with a capital letter. 2.2 subdivision status code base status code, then by one or more Arabic numerals. 2.3 basic status code basic status is divided into 5 kinds of code name description and application F free processing status applies to the product in the molding process, work hardening and heat treatment conditions, the mechanical properties of the unspecified countries have no special requirements. ? Annealed state of the lowest strength of the processed products get fully annealed. ? Hardened state suitable by the work hardening work hardening to improve the strength, the product can be additional heat treatment (or not), so that the strength is reduced. W solid solution heat treatable state of the processed state unstable state, suitable only for alloys after solid solution heat treatment, natural aging at room temperature, the state code indicates that the product is only in the natural aging stage. ? Heat treatable condition (from F, O, H states) applies to products that have been heat treated and stabilized by (or without) work hardening. The T-code must follow one or more Arabic numerals. The first number of the heat-treated is indicated by the T-base type (the details in the heat treatment are indicated by a change from 1 to 10), followed by the number on the back. For example, 6061-T 62 5083-H 343, T1 - stable state from molding temperature cooling and natural aging. T2-Annealed condition (for casting only). T3-Natural aging after solid solution treatment. T31-Natural aging after solid solution treatment cold working (1%). T36-Solid solution treatment cold worked (6%) with natural aging. T37-Natural aging of alloy 2219 after solid solution treatment cold working (7%). T4-Natural aging after solid solution treatment. T41-? Solution treatment quenched in boiling water. T411-solution treatment followed by air cooling to room temperature after hardening, low residual stresses between O and T6. T42- solution treatment followed by natural aging.