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ER120S-1

Tag : ER120S-1

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 (%)

-	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)

-	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