AWS A5.9 ER312 1.2MM MIG Stainless Steel Welding Wire

Applications and Features :

• Weld metal is austenite structure with 30%Cr-9%Ni.

• It has superior crack resistance and high strength due to its high ferrite content.

• It provides good corrosion resistance at high temperature due to its high Cr content.

• It is suitable for welding dissimilar metals, clad steel, stainless steel sheet linings, alloy steel with high hardenability; and, it is used as the buffer layer before hardfacing.

 

Welding Instruction

(1) Weld metal becomes brittle at high service temperature or interpass temperature (2) Use Ar blend with 1~2%O2 for high current, spray transfer welding. (3) Use Ar blend with 1~2%CO2 for low current, short-circuit transfer welding.

Typical Chemical Composition of Weld Metal (wt. %) (Shielding Gas : Ar+2%O2)

C

Si

Mn

P

S

Cr

Ni

0.12

1.62

0.49

0.012

0.011

28.98

10.09

Typical Mechanical Properties of Weld Metal (Shielding Gas : Ar+2%O2)

Tensile Strength N/mm2(kgf/mm2)

Yield Strength N/mm2(kgf/mm2)

Elongation %

740(75.5)

600(61.2)

25

Size and Suggested Operating Range (DC+)

Diameter         (mm)   Operating range

0.8

0.9

1.0

1.2

1.4

1.6

Ar+1~2%CO2

Amp

40~120

60~140

80~160

100~210

—

—

Volt

15~20

15~21

16~22

17~22

—

—

Ar+1~2%O2

Amp

160~210

170~260

180~280

200~300

210~320

220~330

Volt

24~28

24~30

24~30

24~30

24~32

24~32