All series of stainless steel electrodes are described as follows:
Grade National Standard Model
(GB) American Standard Model (AWS) Flux type Welding current Main purpose
G202 E410-16 E410-16 titanium calcium-type AC/DC Welding 0Cr13, 1Cr13, and abrasion-resistant, corrosion-resistant Surface Overlay Welding.
G207 E410-15 E410-15 low hydrogen type DC welding 0Cr13, 1Cr13 and wear-resistant, corrosion-resistant surface cladding.
G217 E410-15 E410-15 low hydrogen DC welding 0Cr13, 1Cr13 and wear-resistant, corrosion-resistant surface cladding.
G302 E430-16 E430-16 calcium titanium type AC/DC welding Cr17 stainless steel.
G307 E430-15 E430-15 low hydrogen type DC welding Cr17 stainless steel.
A002 E 308L -16 E 308L -16 Calcium Titanium type AC/DC Welding Ultra Low Carbon Cr19Ni11 Stainless Steel 0Cr19Ni10 Stainless Steel Structures, such as synthetic fibers, fertilizers, petroleum and other equipment.
A012Si Calcium Titanium Type AC/DC For welding ultra-low carbon C2 steel (OOCr17Ni15Si4Nb) resistant to concentrated nitric acid.
A022 E 316L -16 E 316L -16 Calcium Titanium Type AC/DC For welding urea and synthetic fiber equipment.
A002N E 316L -16 E 316L -16 Calcium Titanium Type AC/DC Mainly used for welding 316LN stainless steel structures.
A022Si A Calcium Titanium AC/DC Used for welding 3RE60 liners or tubes in manufacturing smelting equipment.
A022MO E317L-16 E317L-16 Calcium Titanium Type AC/DC It is used for ultra-low carbon 00Cr18Ni12Mo3 stainless steel, and can also be used for chromium stainless steel and composite steel and dissimilarity steel welding that can not be heat treated after welding.
A032 E317MoCuL-16 E317L-16 Calcium Titanium Type AC/DC Welding of synthetic fibers and other equipment, in dilute, medium concentration media working in the same type of ultra-low carbon stainless steel structure.
A042 E309MoL-16 E309MOL-16 Calcium Titanium AC/DC Welding of urea synthesis tower lining plate and surfacing and welding of the same type of ultra-low carbon stainless steel structure.
A052 A 1 Calcium Titanium Type AC/DC Welding of reactors and separators in resistant, acetic acid and phosphoric acid.
A052Cu A Calcium titanium type AC/DC is used for welding resistant, acetic acid, phosphoric acid in the reactor, separator and so on.
A062 E 309L -16 E 309L -16 calcium titanium type AC/DC For welding synthetic fibers, petrochemical equipment with the same type of stainless steel structure, composite steel and dissimilar steel structure.
A072 A 1 Calcium titanium type AC/DC For welding of 00Cr25Ni20Nb steel, such as nuclear fuel equipment.
A082 A 1 Calcium Titanate type AC/DC is used for welding and repair welding of 00Cr17Ni15Si4Nb, 00Cr14Ni17Si4 and other concentrated nitric acid corrosion resistant steels.
A102 E308-16 E308-16 calcium titanium type AC/DC for welding corrosion-resistant 0Cr19Ni9, 0Cr19Ni11Ti stainless steel structure with working temperature below 300 ℃.
A102H E308H-16 E308H-16 Calcium Titanate AC/DC Welding of corrosion resistant 0Cr19Ni9 stainless steel structures with working temperature below 300 °C
A107 E308-15 E308-15 Low Hydrogen DC Welding of corrosion resistant 0Cr18Ni8 stainless steel structures with working temperature below 300 °C
A107 E308-15 E308-15 Low Hydrogen DC Welding of corrosion resistant 0Cr18Ni8 stainless steel structures.
A132 E347-16 E347-16 Calcium Titanium AC/DC Welding of titanium-stabilized 0Cr19Ni11Ti stainless steel structures of critical importance.
A137 E347-15 E347-15 Low hydrogen type DC welding of important titanium stabilized 0Cr19Ni11Ti stainless steel.
A157Mn A Low Hydrogen DC is used for welding of high strength steels and dissimilar steels. For example, H617 steel.
A146 A 1 Low hydrogen DC Welding of important 0Cr20Ni10Mn6 stainless steel structures.
A202 E316-16 E316-16 Calcium titanium type AC/DC Welding of 0Cr17Ni12Mo2 stainless steel structures working in organic and inorganic acid media.
A207 E316-15 E316-15 Low hydrogen type DC Welding of 0Cr17Ni12Mo2 stainless steel structures working in organic and inorganic acids.
A212 E318-16 E318-16 Calcium Titanium AC/DC Welding of important 0Cr17Ni12Mo2 stainless steel equipment, such as urea, synthetic fibers and other equipment.
A222 E317MuCu-16 1 Calcium Titanium AC/DC Welding of the same type of copper-containing stainless steel structures, such as 0Cr18Ni12Mo2Cu2.
A232 E318V-16 1 Calcium Titanium AC/DC Welding of the general heat and corrosion resistant 0Cr19Ni9 and 0Cr17Ni12Mo2 stainless steel structures.
A237 E318V-15 1 Low hydrogen type DC welding of 0Cr19Ni9 and 0Cr17Ni12Mo2 stainless steel structures for general heat and corrosion resistance.
A242 E317-16 E317-16 Calcium Titanium AC/DC Welding of stainless steel structures of the same type.
A302 E309-16 E309-16 Calcium Titanium AC/DC Welding of the same type of stainless steel, stainless steel lining, dissimilar steels (Cr19Ni9 and low carbon steel), as well as high-chromium and high-manganese steels.
A307 E309-15 E309-15 Low Hydrogen DC Welding of the same type of stainless steel, dissimilar steels, high chromium steel, high manganese steel, etc..
A312 E309Mo-16 E309Mo-16 Calcium titanium type AC and DC Used for welding the same type of stainless steel container with medium corrosion resistance, also can be used for stainless steel lining, composite steel plate, dissimilar steel welding.
A312SL E309Mo-16 E309Mo-16 Calcium Titanium Type AC/DC Used for welding Q235,20g and Cr5Mo and other steel surface aluminum parts, can also be used for dissimilar steel welding
A316 A 1 Calcium Titanium Type AC/DC Used for medium corrosion-resistant stainless steel of the same type, composite steel plate, dissimilar steel welding.
A317 E309Mo-15 E309Mo-15 low hydrogen type DC used for medium corrosion resistance of the same type of stainless steel, composite steel plate, dissimilar steel welding.
A402 E310-16 E310-16 calcium titanium type AC and DC Used for the same type of heat-resistant stainless steel welded at high temperatures, but also can be used for hardening of chromium steel and dissimilar steel welding.
A407 E310-15 E310-15 low hydrogen type DC Used for the same type of heat-resistant stainless steel, stainless steel lining, can also be used for hardening chromium steel and dissimilar steel welding.
A412 E310Mo-16 E310Mo-16 calcium titanium type AC/DC Used for welding heat-resistant stainless steel, stainless steel lining, dissimilar steels working at high temperatures, and excellent toughness in the welding of high hardenability carbon steel, low alloy steel.
A422 A 1 Calcium titanium type AC/DC Used for welding Cr25Ni20Si2 austenitic heat-resistant steel coil on the furnace coil rail machine.
A432 E310H-16 E310H-16 Calcium Titanium Type AC/DC Specialized for welding HK40 heat resistant steel.
A462 A 1 Calcium Titanate AC/DC Used for welding furnace tubes (e.g. HK-40, HP-40, RC-1, RS-1, IN-80) working under high temperature conditions.
A502 E16-25MoN-16 1 Calcium Titanium AC/DC is used to weld quenched low-alloy and medium-alloy steel dissimilar steels and steel structure and the corresponding heat-strengthened steel, such as quenched state of 30 chromium-manganese-silicon, as well as stainless steel, carbon steel, chromium steel and dissimilar steels welded.
A507 E16-25MoN-15 1 low-hydrogen type DC is used to weld the quenched state of low-alloy and medium-alloy steel exotic steel and steel structure and the corresponding heat-strengthened steel, etc., such as the quenched state of the 30 chromium-manganese silicon, as well as stainless steel, carbon steel, the welding.
A512 E 16-8-2 -16 1 Calcium titanium type AC/DC Mainly used for high temperature and high pressure stainless steel pipeline welding.
A517 A low-hydrogen DC electrode used for the composition of equivalent corrosion-resistant steel.
A607 E330MoMnWNb-15 1 low hydrogen DC is used for welding of stainless steel materials of the same type working at high temperatures of 850 ℃ -900 ℃, as well as the hydrogen conversion furnace in the collection of tubes and expansion tubes (eg, Cr20Ni32 and Cr20Ni37 materials) welding.
A707 A 1 Low-hydrogen DC is used for the welding of acetic acid, vinylon, urea and other equipment.
A717 A 1 Low-hydrogen DC For welding of 2Cr15Mn15Ni2N low-magnetic stainless steel electro-physical devices or 1Cr18Ni11Ti dissimilar steels.
A802 A 1 Calcium titanium type AC/DC Welding concentration of 50% and a certain working temperature and atmospheric pressure of the manufacture of synthetic rubber pipes, and Cr18Ni18Mo2Cu2Ti.
A902 E320-16 E320-16 Calcium titanium type AC/DC Used for, nitric, phosphoric and oxidizing acid corrosive media in Carpenter20Cb. Nickel alloy welding, etc.
Grade AWS molten metal chemical composition (%) Mechanical properties of molten metal Usage
C Mn Si S S P Cr Ni Mo Cu Other R m
(MPa) A
(%)
Stainless steel electrode instructions are as follows:
Execution of the GB/T983-1995 standard
Chromium-nickel austenitic stainless steel welding rod has good corrosion resistance and oxidation resistance, widely used in the chemical industry, petroleum, fertilizer, food machinery, medical equipment and other equipment manufacturing. Chromium-nickel stainless steel in the welding, subject to repeated heating will precipitate carbide, which will reduce corrosion resistance and mechanical properties, so should be based on the working conditions of the equipment (operating temperature and type of media, etc.) Selection of welding rod.
General selection of electrodes should be the same or similar to the composition of the base material, mainly according to the medium and working temperature to choose the electrode.
1, the working temperature above 300 ℃, there is a strong corrosive medium, need to use Ti or Nb stability elements or ultra-low carbon stainless steel electrodes; containing dilute or medium, often use stainless steel electrodes containing Mo and Cu.
2, working at room temperature, and weak corrosion, can be used without Ti or Nb stainless steel electrodes.
3, the carbon content of the molten metal on the corrosion resistance of stainless steel has a great impact on the general use of stainless steel electrodes with a carbon content not higher than the base material or the use of ultra-low carbon stainless steel electrodes.
Stainless steel welding precautions chromium stainless steel weldability is poor, martensitic chromium stainless steel welding has a tendency to brittle hard, ferritic chromium stainless steel in the welding of high-temperature effect of the grain is easy to grow up, which make the weld has a high degree of brittleness. Although the weldability of chromium-nickel stainless steel is better, but the welding current is large prone to intergranular corrosion of welded joints, weld thermal cracking, weld stress and deformation increase.
1, stainless steel electrodes usually have titanium calcium type and low hydrogen type two. Welding current as far as possible using DC power supply, is conducive to overcoming the redness of the electrode and shallow melting depth. Titanium calcium flux skin electrode is not suitable for all-position welding, only suitable for flat welding and fillet welding; low hydrogen flux skin electrode can do all-position welding.
2, stainless steel electrodes should be kept dry when in use. In order to prevent cracks, craters, pores and other defects, titanium calcium flux skin before welding by 150-250 ℃ drying 1h, low hydrogen flux skin before welding by 200-300 ℃ drying 1h. can not be repeated drying, otherwise the flux skin is easy to fall off.
3, the weld port clean, while preventing the electrode on the oil and other dirt, so as not to increase the carbon content of the weld and affect the welding quality.
4, in order to prevent heating and intergranular corrosion, the welding current should not be too large, generally should be lower than the carbon steel electrode 20% or so, the arc should not be too long, the interlayer fast cooling, to narrow welding is appropriate.
5, citing the arc of attention, not in the non-welding parts of the arc, it is best to use the same material as the weldment arc plate to lead the arc.
6, should try to use a short arc welding, arc length is generally 2-3mm, the arc is too long and easy to produce hot cracks.
7, transport bar: should be used short arc fast welding, generally do not allow lateral swing, the purpose is to reduce the heat and heat-affected zone width, improve the weld resistance to intergranular corrosion and reduce the tendency to thermal cracking.
8, dissimilar steel welding should be carefully selected welding rod to prevent improper selection of welding rod thermal cracking or high temperature heat treatment caused by σ-phase precipitation, so that the metal embrittlement. Refer to the stainless steel and dissimilar steel welding rod selection criteria for selection, and take appropriate welding process.
References:
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