GM 90SB3

CLASSIFICATION : AWS/SFA 5.28: ER 90S-B3

CHARACTERISTICS :

Copper coated 2.4% Cr / 1.0 % Mo alloyed solid wire for MIG welding creep resisting steels of similar composition, used in steam generation plant operating at temperature upto 600°C. Suitable for use in the chemical and petrochemical industries where resistance to hydrogen attack, corrosion from sulphur bearing crude oil and stress corrosion cracking in sour environments is required.

COMPOSITION OF THE WIRE (RANGE) %

C Mn Si Cr Cu
0.07-0.12 0.40-0.70 0.40-0.70 2.30-2.70 0.35 max
Ni Mo S P
0.20 max 0.9-1.20 0.025 max 0.025 max

MECHANICAL PROPERTIES OF THE WELD METAL (RANGE) PWHT (690oC/1 hr)

Tensile Strength N/mm2 Yield Stress N/mm2 Elongation%(L=4D)
630-720 550-630 18-25

APPLICATIONS:

APPLICATIONS ASTM A 387 grade, Cast A 217 WC7 A199, A200, A213, Grades T22, T36, T4 A335 grade P22.

SHIELDING GAS : Argon + 3 to 5%CO2

WELDING CURRENT : DC ( - )

PREHEAT AND INERPASS TEMP : 150 – 250°c

PACKING SPECIFICATION

SIZE (MM) Wt per spool per Kg
0.8 12.5/15
1.2 12.5/15
1.6 12.5/15