AK-ER90S-B9
Standard:
EN ISO 21952-A:G CrMo91
AWS A5.28 ER90S-B9
GB/T 8110 ER62-B9
Description: AK-ER90S-B9 is a heat-resistant steel gas shielded welding wire contain-ing Cr9%-Mo1%- Ni0 .7%-VNb. The weld metal has good mechanical properties and good all-position welding performance. Usually, during welding, the weldment needs to be preheated and maintained at a temperature of 200-300°C between passes, and then tempered at 735-765°C after welding.
Application: Used for welding improved 9Cr1Mo type (such as T/P91, F9, etc.) heat-resistant steel with a working temperature of 600-650 ℃, such as steam pipes of high temperature and high pressure boilers, superheater pipes, furnace pipes of petroleum cracking units, etc. Manual tungsten Extreme argon arc welding primer and full argon welding.
Typical Chemical Composition(%):
C:0.07-0.13 Mn:1.2 P:0.010 S:0.010 Si:0.15-0.50 Cr:8.0-10.5 Mo:0.85-1.2 Ni:0.80 V: 0.15-0.30
Typical Mechanical Properties(%):
Test Item Tensile strength (MPa) Yield Stress (MPa) Elongation (%) Impact values (J)
Standard ≥620 ≥410 ≥16 ——
Typical Value 720 510 18 ——