Aluminum Alloy Grades
And Condition Tensile Strength (25°C MPa) Yield Strength (25°C MPa) Hardness 500kg force 10mm ball Elongation 1.6mm (1/16in) thickness
5052-H112 175 195 60 12
5083-H112 180 211 65 14
6061-T651 310 276 95 12
7050-T7451 510 455 135 10
7075-T651 572 503 150 11
2024-T351 470 325 120 20
Typical Physical Properties of Aluminum Alloys
Aluminum Alloys Grades and States Coefficient of Thermal Expansion
(20-100°C)
μm/m?6?1k Melting Point Range
(°C) Conductivity 20°C(68°F)
(%IACS) Resistivity 20°C(68°F)
Ωmm2/m Density(20°C)(g/cm3)
2024-T351 23.2 500-635 30 0.058 2.82
5052-H112 23.8 607- 650 35 0.050 2.72
5083-H112 23.4 570-640 29 0.059 2.72
6061-T651 23.6 580-650 43 0.040 2.73
7050-T7451 23.5 490-630 41 0.0415 2.82
7075-T651 23.6 475-635 33 0.0515 2.82
Chemical Composition Limit Of Aluminum )
Alloy
Grade Silicon Si Iron Fe Copper Cu Manganese Mn Magnesium Mg Chromium Cr Zinc Zn Titanium Ti Other Aluminum
Each Total Minimum
2024 23.2 0.5 3.8-4.9 0.3-0.9 1.2-1.8 0.1 0.25 0.15 0.05 0.15 Balance
5052 25 0.4 0.1 0.1 0.1 2.2-2.8 0.15-0.35 0.1 -- 0.05 0.15 Balance
5083 23.8 0.4 0.1 0.3-1.0 4.0-4.9 0.05-0.25 0.25 0.15 0.05 0.15 Balance
6061 23.6 0.7 0.15-0.4 0.15 0.8-1.2 0.04-0.35 0.25 0.15 0.05 0.15 Balance
7050 23.5 0.15 20.-2.6 0.1 1.9-2.6 0.04 5.7-6.7 0.06 0.05 0.15 balance
7075 23.6 0.5 1.2-2.0 0.3 2.1-2.9 0.18-0.28 5.1-6.1 0.2 0.05 0.15 balance
- ● -- --
Construction -- ● -- ● -- --
Motor vehicles ● -- -- ● -- --
Construction products -- ● -- ● -- --
Chemical equipment -- ● -- --
Containers -- ● -- --
Cooking utensils -- - --
Cylinders or pistons ● -- -- ● -- --
Pumps -- -- ● -- --
Electronics -- -- ● -- --
Electrical -- ● -- ● -- --
Fasteners ● ● -- ● ● ●
Shielded wires -- -- ● -- --
Blades -- -- ● -- --
Furniture -- -- ● -- --
Cartridge containers -- -- -- --
Hardware fixtures ● -- -- ● ● ●
Medical equipment ● -- -- ● -- --
Kitchen equipment -- ● ● --
Lamp holders -- -- -- --
Water Uses -- ● -- ● -- --
Machinery Accessories -- ● -- ● ● ● ●
Name Signs -- ● -- -- --
Armament Supplies ● -- ● ● ● ●
Pipes -- ● -- ● --
Carcasses -- ● ● ● -- --<
Recreational Facilities ● -- -- ● ● ● ●
Storage Containers -- ● -- ● -- --
Architecture -- -- ● -- --
Trucks & Trailers -- ● -- ● -- --
Zippers -- -- ● -- -- --
Off-the-shelf
Model Sheets Round Bars Flat/Square Strips
6061 T6 ● ● ● ●
6061 T651 ● ----
6061 T6511 -- ● ----
7075 T651 ● ----
7075 T6 ● ● ● ----
5052 H112 Precision Plate ● ----
5052 H32 Stamping Plate ● -- --
5083 H112 ● -- --
Alumould ● -- --
Mic-6 ● -- --
2024 ● -- --
K-100 ● -- --
Product Parameters
Commonly Used Aluminum Alloys in China and the U.S. Comparison Table
China CHINA USA THE UNITED STATES
L1-L6, L5-1 1070, 1060, 1050, 1030, 1100
LY11, LY12, LY1 2017, 2024, 2117
LD10, LD5 2014, 2214
LD7 2618
LD9, LD8 2018, 2218
LY16, LY17 2219, 2021
LF21 3003
LF2, LF3, LF4 5052, 5154, 5083
LF5, LF11, LF6, LF5-1 5456, 5056
LD2, LD2-1, LD2-2, LD30, LD31 6165, 6061, 6055, 6063
LC6, LC4, LC9 7001, 7178, 7075
LC5, LC10 7076, 7175, 7079
LD11 4032
China's new and old alloy brand comparison table (GB/T 3190-1996)
New brand old brand new brand old brand new brand old brand new brand old brand old brand
1A99 the original LG5 2B12 the original LY9 3003 -
1A97 the original LG4 2A13 Formerly LY13 3103 -
1A95 - 2A14 Formerly LD10 3004 -
1A93 Formerly LG3 2A16 Formerly LY16 3005 -
1A90 Formerly LG2 2B16 Used to be LG2 2B16 Previously Ly16-1 3105 -
1A85 Previously LG1 2A17 Previously LY17 4A01 Previously LT1
1080 - 2A20 Previously LY20 4A11 Previously LD11
1080A - 2A21 Previously 214 4A13 Formerly LT13
1070 - 2A25 Previously 225 4A17 Formerly LT17
1070A Replaced L1 2A49 Previously 149 4004 -
1370 - 2A50 Former LD5 4032 -
1060 Represents L2 2B50 Former LD6 4043 -
1050 - 2A70 Former LD7 4043A -
1050A for L3 2B70 used LD7-1 4047 -1A50 former LB2 2A80 former LD8 4047A -
1350 - 2A90 former LD9 5A01 Used 2101, LF15
1145 - 2004 - 5A02 Former LF2
1035 Generation L4 2011 - 5A03 Former LF3
1A30 Former L4-1 2014 - 5A05 Former LF5
1100 Generation LF5-1 2014A - 5B05 Former LF10
1200 Generation L5 2214 - 5A06 Former LF6
2A01 Former LY1 2017A - 5A12 Former LF12
2A02 Former LY2 2117 - 5A13 Former LF13
2A04 Former LY4 2218 - 5A30 Formerly 2103, LF16
2A06 Former LY6 2618 - 5A33 Formerly LF33
2A10 Formerly LY10 2219 Formerly LY19, 147 5A41 Formerly LT41
2A11 Former LY11 2024 - 5A43 Former LF43
2B11 Former LY8 2124 - 5A66 Former LT66
2A12 Former LY12 3A21 Former LF21 5005 -
5019 - 6B02 Former LD2-1 7A09 Former LC9
505050 - 6A51 Used 651 7A10 Former LC10
5251 - 6101 - 7A15 Used LC15, 157
5052 - 6101A - 7A19 Used 919, LC19
5154 - 6005 - 7A31 Used 183-1
5154A - 6005A - 7A33 Used LB733
5454 - 6351 - 7A52 Used LC52, 5210
5554 - 6060 - 7003 Former LC12
5754 - 6061 Former LD30 7005 -
5056 Former LF5-1 6063 Former LD31 7020 -
5356 - 6063A - 7022 -5456 - 6070 Former LD2-2 7050 -
5082 - 6181 - 7075 -
5182 - 6082 - 7475 -
5083 Former LF4 7A01 Former LB1 8A06 Former L6
5183 - 7A03 Former LC3 8011 Used LT98
5086 - 7A04 Former LC4 8090 -
6A02 Former LD2 7A05 Used 705 -
Note:
(1) "Original" refers to the chemical composition is equivalent to the new grade, and are in line with the GB3190-82 provisions of the old grade.
(2) "Generation" refers to the chemical composition with the new grade is similar, and are in line with the GB3190-82 provisions of the old grade.
(3) "was used" refers to have been identified, industrial production has been used in the grade, but not included in GB3190-82.
Alloy system ALLOY SYSTEM STATE TEMPER
L -- Aluminum R -- hot working state
LF -- Rust-proof aluminum alloy (Ai - Mg, Ai - Mn) M -- Annealed state
LY -- Hard aluminum alloy (Ai - Cu - Mg) Y -- Work hardening state
LC -- Super-hard aluminum alloy (Ai - Cu - Mg) Y -- Work hardening state
LC -- Super-hard aluminum alloy (Ai - Cu - Mg) LC -- Superhard Aluminum Alloys (Ai - Cu - Mg - Zn) C -- Hardened condition
LD -- Forged Aluminum Alloys (Ai - Mg - Si & Cu - Mg - Si) CZ -- Hardened, natural ageing condition
LT -- Specialty Aluminum Alloys CZY -- Hardened, natural ageing, cold-worked condition
- CS -- Hardened, artificial ageing condition
- CSY -- Hardened, artificially aged, cold-worked state
- Y2 -- Semi-hard state
- RCS (T5) -- Air-cooled, artificially aged state
(GB/T16475-1996) Basic state code, name, description and application
Code Name Description and Application Application
F Free processing state applies to the products in the molding process, there is no special requirement for work hardening and heat treatment conditions, the mechanical properties of the products in this state are not stipulated
O Annealed state applies to the processed products which have been completely annealed to obtain the minimum strength
H Work hardening state applies to the products which have been work hardened to improve the strength, the products can be (or can not be) processed after work hardening, the products can be (or can not be) processed after work hardening. H code must be followed by two or three Arabic numerals
W solution heat-treated state An unstable state, applicable only to alloys that are naturally aged at room temperature after solid solution heat treatment, and the code only indicates that the product is in the natural aging stage
T heat-treated state
(different from F, O, O, O) >T (different from F, O, H) Applies to the products which reach the stable state after heat treatment and after (or without) work-hardening The T code must be followed by one or more arabic numerals
Chinese new and old original state code comparison table (GB/T16475-1996)
Old Code New Code Old Code New Code New Code
M O CYS TX51, TX52
R H112 or F CZY T0
Y HX8 CSY T9
Y1 HX6 MCS T62
Y2 HX4 MCZ T42
Y4 HX2 CGS1 T73
T HX9 CGS2 T76
< p>CZ T4 CGS3 T74CS T6 RCS T5
Note: For products delivered in R state and provided with the performance of CZ and CS specimens, their states can correspond to the new designations T62 and T42, respectively.
HXY Subdivided state code and processing hardening degree
Subdivided state code Processing hardening degree
HX1 The limit of tensile strength of HX1 is 0.5mm. HX6 Tensile strength limit is midway between HX4 and HX8 states
HX7 Tensile strength limit is midway between HX6 and HX8 states
HX8 Hard state
HX9 Ultra-hard state, minimum tensile strength limit exceeds that of HX8 by at least 10 MPa
Note: When the HX1 to HX8 tensile strength limits determined in accordance with the above table are used, they must be at least 10 MPa. above table, the tensile strength extremes determined for states HX1 through HX9, not ending in 0 or 5, shall be revised to the greater of the adjacent values ending in 0 or 5.
TX breakdown state code description and application
State code description and application
T0 solid solution heat treatment, after natural aging and then through the state of cold working, applicable to the cold working to improve the strength of the product
T1 by the high temperature molding process cooled, and then naturally aging to the state of the basic stability of the state, applicable from the high temperature molding process cooling, no longer cold working (can be corrected). No longer cold working (can be straightened, leveled, but does not affect the mechanical properties of the limit) of the product
T2 by the high temperature molding process cooling, cold working and then natural aging to a basically stable state, applicable to the high temperature molding process cooling, cold working, or straightening, leveling to improve the strength of the product
T3 solid solution heat treatment and then cold working, and then natural aging to a basically stable state, applicable to the high temperature molding process cooling, cold working, or straightening, leveling to increase strength
T3 solution heat treatment and then natural aging to Basic stabilized state, suitable for after solution heat treatment, cold working, or straightening. Leveling to improve the strength of the product
T4 solid solution heat treatment after natural aging to a basically stable state applies to the solid solution heat treatment, no longer cold working (can be straightened, leveled, but does not affect the mechanical properties of the limit) of the product
T5 by the high-temperature molding process cooled, and then artificially aging state applies to the high-temperature molding process cooled, without cold working ( Can be straightened, leveled, but does not affect the mechanical properties of the limit), to be artificially aging products
T6 solid solution heat treatment after artificial aging state applies to the solid solution heat treatment, no longer cold working (can be straightened, leveled, but does not affect the mechanical properties of the limit) of the product
T7 solid solution heat treatment after the state of aging applies to the solid solution heat treatment in order to Acquisition of certain important properties, in the artificial aging, the strength of the aging curve in the highest peak point of the product
T8 solid solution heat treatment after cold working, and then artificially aging state
applicable to the cold working, or straightening, flattening to improve the strength of the product
T9 solid solution heat treatment, and then artificially aging, and then cold working state, for the cold processing to improve the strength of the product
T9 solid solution heat treatment after artificial aging, and then cold working state, for the cold working to increase the strength of the product
T10 from the high temperature molding process after cooling, cold working, and then artificially aging state, applicable to the cold working, or straightening, leveling to improve the strength of the product
Note: some 6XXX series of alloys, whether the furnace solid solution heat treatment, or from the high temperature molding process of the cold process in order to retain the soluble components in the solid solution, can achieve the same solid solution heat treatment effect. The same solid solution heat treatment effect, these alloys of T3, T4, T6, T7, T8 and T9 state can be used in either of the two heat treatment methods mentioned above.
TXX and TXXX breakdown State code description and application
State code description and application
T42 is applicable to products that have been solid solution heat treated from O or F state and naturally aged to a fully stabilized state, and is also applicable to products that have been heat treated by the demand side to any state of processed products and have reached the mechanical properties of T42 state
T62 is applicable to products that have been heat treated from O or F state to a fully stabilized state. Applies to the O or F state of solid solution heat treatment, after artificial aging of the product, also applies to the demand side of any state of the processed product heat treatment, the mechanical properties of the product has reached the T62 state
T73 Applies to the solid solution heat treatment, after aging in order to achieve the specified mechanical properties and resistance to stress corrosion properties of the product
T74 and the definition of the state of the same as the T73. The tensile strength of this state is greater than that of the T73 state, but less than that of the T76 state
T76 is the same as the definition of the T73 state. The state of the tensile strength are higher than the T73, T74 state, respectively, the resistance to stress corrosion fracture performance are lower than the T73, T74 state, respectively, but its resistance to peeling corrosion performance is still better
T72 applies to the O or F state from the solid solution heat treatment, artificial aging treatment, mechanical properties and corrosion resistance to reach the state of the T7X products
T81 applies to the solid solution After heat treatment, by about 1% of cold working deformation to improve the strength, and then artificially aging products
T87 For solid solution heat treatment, by about 1% of cold working deformation to improve the strength, and then artificially aging products
Machining of aluminum alloy screw holes by extrusion taps
________________________________________
(2006-03-07 16:10:19 )
In the process of machining threaded holes in different materials, it can be found that, for the threaded holes in materials with dense material and high strength (e.g., steel parts), due to their roughness, rigidity and strength is high, the bolt used can be screwed in and out many times, and the screw hole is not easy to be damaged; while for the threaded holes on aluminum alloy parts, its roughness and strength are low, and after the bolt is screwed in and out again and again, the screw holes are easy to be damaged, thus affecting the use of the workpiece. The use of extrusion taps to process aluminum alloy workpiece screw holes can be better to prevent damage to the screw holes.
Because of the aluminum alloy die casting surface 1mm or less easy to appear air holes, so the use of drilling, tapping and other conventional processing technology is easy to produce a broken buckle, and the extrusion molding process out of the threaded holes of higher strength. Extrusion molding is a kind of non-cutting processing, theoretically, the amount of material reserved for the surface of the bore and the formation of the thread in the unit length of the volume is equal, according to which can be calculated as follows:
Thread specifications - the diameter of the bottom hole
M3-2.71mm
M4 -3.74mm
M5-4.64mm
M6-5.55mm
(upper deviation +0.05mm, lower deviation -0.08mm)
M8- 7.45mm
M10-9.35mm
M12-11.25mm
(Upper deviation +0.06mm, lower deviation -0.12mm)
In view of the special characteristics of thread extrusion molding, its cutting parameters are also different from the ordinary tap
M5 taps: speed of 400r/min, feed amount of 320mm/min
M6 taps: speed 400r/min, feed amount of 400mm/min
In addition, it is recommended to use the appropriate bottom hole drill to smooth the bottom hole before tapping to eliminate bottom hole defects and prevent the extrusion tap from breaking.