GFC 91-B3

SPECIFICATION : AWS/SFA 5.29: E91T1-B3C ASME – IIC/SFA-5.29-E 91T1-B3C

CHARACTERISTICS :

Tubular rutile flux-cored wire for single or multipass welding of 2.25Cr - 1.0Mo  heat resistant steels used for steam pipes of boilers of thermal power plant and similar types of steels, with CO2 shielding gas. The good weldability in all positions, excellent bead appearance, less spatter, a fast freezing and easy to remove slag. Deposited welds arc of radiographic quality.

TYPICAL APPLICATION :

Power Plant equipments, pipes and Cr-Mo steels having requirements of high creep resistance.

Alloyed Steel :  ASTM, A335 Grade P21, P22, F21 or equivalent.

WELD METAL ANALYSIS (RANGE) % :

C Mn Si S P Cr Mo
0.05-0.12 0.50-1.25 0.30-0.80 0.030 max 0.030 max 2.0 - 2.50 0.90 - 1.25

MECHANICAL PROPERTIES : After PWHT of 690 +  14°C/ 1 hour.

Tensile Strength MPa  Yield Stress MPa Elongation (%) (L=4D)
630 min 560 min 19 min

Shielding Gas : CO2

Flow Rate : 14-20 l/min

RECOMMENDED WELDING PARAMETERS  :

Size (mm) Amps  DC (+)

Weight of the spool (KG)

1.2 120-250 15
1.6 180-350 15