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ER70S-7


Alloy Type:

ER70S7 is a general purpose MIG wire suitable for many carbon steel welding applications but with substantially greater manganese content than ER70S-3 welding alloy,  the higher manganese provides slightly better wetting and weld appearance with slightly higher tensile and yield strengths as well.  These combined properties permit increased speed when compared to S-3 product.  Under equivalent welding conditions, ER70S-7 produces as weld hardness lower than ER70S-6 but higher than ER70S-3.

Typical Applications:  high tensile strength steels for automobiles; rolling stock; electrical appliances; machinery; air conditioners, light gauge steels, pipes, steel frames

 

AWS Class: ER70S7 Certification:                  AWS A5.18/A5.18M:2005
Alloy:  ER70S7 ASME SFA A5.18

 

Welding Position:              F, V, OH, H Current:

MIG-DCEP

TIG-DCEN

 

Tensile Strength, kpsi: 82 100%Co2
Yield Strength, kpsi: 68 100%Co2
Elongation in 2”%: 27 100%Co2

 

Typical Wire Chemistry as per AWS A5.18 (single values are maximum)

C Mn Si P S Ni Cr Mo V Cu
0.07-0.15 1.50-2.00 0.50-0.80 0.025 0.035 0.15 0.15 0.15 0.03 0.50
Typical Welding Parameters
Diameter Process Volt Amps Shielding Gas
in (mm)
 .035  (0.9) GMAW  28-32 165-200 Spray Transfer 98% Argon+2% Oxygen or 75% Argon+25% CO2
 .045  (1.2) GMAW  30-34 180-220 Spray Transfer 98% Argon+2% Oxygen or 75% Argon+25% CO2
 1/16  (1.6) GMAW  30-34 230-260 Spray Transfer 98% Argon+2% Oxygen or 75% Argon+25% CO2
 .035  (0.9) GMAW  22-25 100-140  Short Circuiting Transfer 100% COor 75% Argon +25% CO2
 .045  (1.2) GMAW  23-26 120-150 Short Circuiting Transfer 100% COor 75% Argon +25% CO2
 1/16  (1.6) GMAW  23-26 160-200  Short Circuiting Transfer 100% COor 75% Argon +25% CO2
 1/16  (1.6) GTAW  12-15 100-125  100% Argon
 3/32  (2.4) GTAW  15-20 125-175 100% Argon
 1/8  (3.2) GTAW  15-20 175-250 100% Argon

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