Er120s-1

AWS A5.28 Class ER120S-1

ER120S-1 is used for a variety of steels where high strength and ductility are critical. It is designed to give high notch toughness, yield strength and impact resistance. ER120S-1 can be welded at an interpass temperature as low as 300°F while also offering high ductility to -75°F. Typical application may be high yield steels such as T-1, HY-100 and other steels in the 100,000 psi YS class, pressure vessels. Mechanical properties from the weld deposit will vary depending on heat input used. Preheat and interpass of 300°F may be required.

TYPICAL WIRE CHEMISTRY (%)

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ER120S-1

AWS Spec

C

0.07

0.10 max.

Mn

1.55

1.40-1.80

Si

0.35

0.25-0.60

P

0.006

0.010 max.

S

0.008

0.010 max.

Ni

2.40

2.00-2.80

Mo

0.55

0.30-0.65

Cr

0.45

0.60 max.

Typical mechanical properties of weld metal (C02 shielding gas)

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ER120S-1

AWS Spec

Yield strength (psi)

110,000

105,000 min

Ultimate tensile strength (psi)

125,000

120,000 min

Elongation in 2" (%)

15

14 min

Charpy V-notch at -60 F (ft. lbs)

70

50 min

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