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WIRES FOR WIRE WELDING

Classification

Guide to AWS A5.18-1993 Chemical composition of wire or rod

AWS Classifications

C

Mn

Si

P

S

Cu

ER 70 S-2 ER 70 S-3 ER 70 S-4 ER 70 S-5 ER 70 S-6 ER 70 S-7 ER 70 S-G

<0.07 0.06-0.15 0.07-0.15 0.07-0.19 0.07-0.15 0.07-0.15 -

0.90-1.40 0.90-1.40 1.00-1.50 0.90-1.40 1.40-1.85 1.50-2.00 -

0.40-0.70 0.45-0.70 0.65-0.85 0.30-0.60 0.80-1.15 0.50-0.80 -

<0.025 <0.025 <0.025 <0.025 <0.025 <0.025 <0.025

<0.035 <0.035 <0.035 <0.035 <0.035 <0.035 <0.035

<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50

Mechanical properties of weld metal AWS Tensile Classifications strength

min. MPa

ER 70 S-2 ER 70 S-3 ER 70 S-4 ER 70 S-5 ER 70 S-6 ER 70 S-7 ER 70 S-G

500 500 500 500 500 500 500

Yield Elongation strength min. % min. MPa (0.2% proof) 420 420 420 420 420 420 420

22 22 22 22 22 22 22

Impact Energy Charpy-V J/°C

Shielding gas

27/-29 27/-18 Not required Not required 27/-29 27/-29 Not required

CO2 or Ar/Co2 CO2 or Ar/Co2 CO2 or Ar/Co2 CO2 or Ar/Co2 CO2 or Ar/Co2 CO2 or Ar/Co2 CO2 or Ar/Co2

3.03

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