J757Ni GBE7515-G AWS E11015-G low-alloy high strength steel welding rod

J757Ni

According with GB E7515-G
Corresponding with AWS E11015-G

Current：Mainly used for steel at corresponding strength grade, such as 14MnMoNbB, WEL-TEN80, etc.

Introduction: J757Ni is a kind of low-alloy high strength steel electrode with low-hydrogen natrium type coating. The deposited metal has excellent mechanical properties, and especially higher low temperature impact toughness and excellent crack-resistance.

Uses: Mainly used for steel at corresponding strength grade, such as 14MnMoNbB, WEL-TEN80, etc.

Chemical Composition of Deposited Metal (%)

Chemical Composition	C	Mn	Si	S	P	Ni	Mo	Cr
Guarantee Value	≤0.10	≥1.00	≤0.60	≤0.030	≤0.030	2.00~2.60	0.40~0.70	≤0.20

Mechanical Properties of Deposited Metal

Test Item	R_m(MPa)	R_eL或R_p0.2(Mpa)	A(%)	KV₂(J)
Guarantee Value	≥740	≥640	≥13	≥27(-40℃)
General Result	820	690	22	88

Diffusible Hydrogen Content in Deposited Metal: ≤4.0ml/100g(Glycerine Hydrogen Test)

X-ray Radiographic Inspection: ⅠDegree

Reference Current (DC+)

Electrode Diameter(mm)	φ2.5	φ3.2	φ4.0	φ5.0
Welding Current (A)	60~90	80~130	140~180	180~240

Instructions:
1.The electrodes must be baked under about 350-380℃ for an hour before welding, and used as soon as baking is completed.
2.The stains on the weldments, such as rust, oil stains, moisture, etc., must be cleared away before welding.
3.When welding, short arc must be used and stringer bead is suitable.