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ER90S-B9

AWS A5.28 ER90S-B9

ER90S-B9 is a 9% Cr & 1 Mo wire modified with niobium (CB) and vanadium designed to provide creep-rupture strength, toughness, fatigue life, oxidation and corrosion resistance at elevated service temperature and high pressures. This wire is suitable for 9% Chromium steels such as P91, T91, F91 and ASTM A-213, A-335, A-387. Applications include fabrication of turbines, header systems, steam piping, electric generation, and petrochemical equipment. Controlled preheat, interpass and postheat treatment may be needed to avoid cracking.

TYPICAL WIRE CHEMISTRY (%)

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ER90S-B9

AWS Spec

C

0.09

0.07-0.13

Mn

0.54

1.20 max.

Si

0.22

0.15-0.50

P

0.008

0.10 max.

S

0.002

0.10 max.

Mo

0.90

0.85-1.20

Cr

8.90

8.00-10.50

N

0.044

0.03-0.07

Nb

0.046

0.02-0.10

V

0.22

0.15-0.30

Ni

0.46

0.80 max.

Cu

0.13

0.20 max.

Al

0.016

0.04 max.

Typical mechanical properties of weld metal (C02 shielding gas)

-

ER90S-B9

AWS Spec

Yield strength (psi)

95,500

60,000 min

Ultimate tensile strength (psi)

110,500

90,000 min

Elongation in 2" (%)

17.3

16 min

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


N/A