AWS E12015-G Low-alloy Steel Electrode

AWS E12015-G Low-alloy Steel Electrode

J857Cr
GB：E8515-G
AWS：E12015-G
Current：Used for welding pressure vessels made of low-alloy high strength steel with tensile strength of about 830MPa and some other structures, such as 14CrMnMoVB, 30CrMo, 35CrMo, etc.
According with GB E8515-G
Corresponding with AWS E12015-G


Introduction: J857Cr is a kind of low-alloy high strength steel electrode with low-hydrogen natrium type coating. DCRP (Direct Current Reversed Polarity). All-position welding.


Uses: Used for welding pressure vessels made of low-alloy high strength steel with tensile strength of about 830MPa and some other structures, such as 14CrMnMoVB, 30CrMo, 35CrMo, etc.


Chemical Composition of Deposited Metal (%)
Chemical Composition
C
Mn
Si
S
P
Mo
Cr
V
Guarantee Value
≤0.15
≥1.00
≤0.60
≤0.035
≤0.035
0.50~1.00
0.7~1.00
0.05~0.15
General Result
≤0.10
~1.60
≤0.40
≤0.020
≤0.020
~0.60
~0.80
~0.05

Mechanical Properties of Deposited Metal
Test Item
Rm(MPa)
ReL或Rp0.2(Mpa)
A(%)
KV2(J)
Guarantee Value
≥830
≥740
≥12
—(normal temperature)
General Result
860~950
≥750
12~18
≥27

Diffusible Hydrogen Content in Deposited Metal: ≤5.0ml/100g(Chromatography or Mercury Method)

X-ray Radiographic Inspection: ⅠDegree

Reference Current (DC+)
Electrode Diameter(mm)
φ2.5
φ3.2
φ4.0
φ5.0
Welding Current (A)
60~90
80~110
130~170
160~200

Instructions:
1.The electrodes must be baked under 350-400℃ for an hour before welding, put into a 100-150℃insulation can and taken as soon as they are needed.
2.The stains on the weldments like rust must be cleared away, and the weldments must be preheated to about 200℃.
3.Weldments can be tempered under 600-650℃ after welding so as to eliminate internal stress.

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