AK-657Q

Standard: 

EN ISO 18275-A E 55 5 Mn1 NiMo B 4 2

AWS A5.5 E9015-D1,

GB/T 5118-1995 E6015-G

Description: AK657Q is an ultra-low hydrogen and high toughness electrode with low-hydrogen sodium type coating, which adopts DC reverse connection. All-position welding is possible, with good overall performance.

Application:  lt is used for bridge welding structures such as important low-alloy steel Q500qE.

Typical Chemical Composition(%): 

C:≤0.10    Si:≤0.6    Mn:1.0-2.0    S:≤0.015    P:≤0.020

Ni:0.8-1.7    Mo:0.1-0.4

Typical Mechanical Properties(%): 

Tensile strength (MPa) : ≥630

Yield Stress (MPa) :  ≥530

Elongation (%) :  ≥17J

Impact values (J)  :  ≥47J/-40℃

Recommended welding parameters: 

2.5mm:  F/H-70-110A     V/OH-50-80A

3.2mm:  F/H-90-130A     V/OH-80-110A

4.0mm:  F/H-140-180A   V/OH-130-170A

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