ER70S-3

AWS A5.18 ER70S-3
ASME SFA 5.18 ER70S-3

ER70S-3 is a silicon and manganese deoxidized wire used for mild and low alloy steel general purpose fabrication. A well balanced silicon and
manganese content permits its use with CO2, Argon-Oxygen mixtures, or mixtures of the two. This wire may be used for short-circuiting arc (dip-transfer), buried arc, as well as spray transfer arc processes. ER70S-3 produces quality welds with rimmed steels, better welds on semi-killed
steels and excellent welds on killed steels. It yields an almost slag-free deposit which does not require cleaning for many applications thereby
providing low plate preparation costs, good bead appearance and welder satisfaction.

Applications:

Automobile frames, earthmoving and farm equipment, sheet metal, ships and barges, railcars, trailers, ornamental iron, metal furniture, storage bins and general fabrications.

TYPICAL WIRE CHEMISTRY (%)

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ER70S-3

AWS Spec

C

0.100

0.06 - 0.15

Mn

1.000

0.90-1.40

Si

0.550

0.45-0.75

P

0.012

0.025 max

S

0.012

0.035 max

Typical mechanical properties of weld metal (C02 shielding gas)

-

AWS Spec

ER70S-3

Yield strength (psi)

60,000 min

62,400

Ultimate tensile strength (psi)

72,000 min

75,500

Elongation in 2" (%)

22 min

30.7

Charpy V-notch at 0 F (ft. lbs)

20 min

66

Reduction of area

-

59

Average Brinell Hardness

-

130

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