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ER70S-B2L

AWS A5.28 ER70S-B2L

70S-B2L is a low alloy filler designed to produce high strengths on 1 1/4 & Cr-1/2 Mo steels found in high temperature/high pressure piping and vessels. This alloy is identical to the ER80S-B2 except it has a lower carbon content maximum that may lower the strength & hardness and exhibits greater resistance to cracking and used more often when welds are left in the as-welded condition. It may also be used on carbon steels to Cr-Mo base metals. Controlled preheat, interpass and postheat treatment may be needed to avoid cracking. 

TYPICAL WIRE CHEMISTRY (%)

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ER70S-B2L

AWS Spec

C

0.042

0.05 max.

Mn

0.58

0.40-0.70

Si

0.45

0.40-0.70

P

0.01

0.025 max.

S

0.006

0.025 max.

Mo

0.45

0.40-0.65

Cr

1.28

1.20-1.50

Cu

0.21

0.35 max

Ni

0.05

0.20 max

Typical mechanical properties of weld metal (C02 shielding gas)

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ER70S-B2L

AWS Spec

Yield strength (psi)

58,000

58,000 min

Ultimate tensile strength (psi)

75,000

75,000 min

Elongation in 2" (%)

19

19 min

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


N/A