DAIKOWM 2CrMo

GMAW
  • CREEP RESISTING STEELS
2Cr1Mo

Description

Solid wire for creep resisting 2¼Cr-1Mo steels
Rod wire designed for prolonged elevated temperature service up to about 600°C, especially in steam generation power plants (piping, valve bodies, turbine casting, boiler superheater). Suitable for corrosion resistance to sulphur bearing crude oil at 250-450° C. Used in chemical and petro-chemical industries for resistance to hydrogen attack in fabrication of hydrocrackers, coal liquefaction plant and NH3 pressure vessel operating at up to 450° C.
Specifications
ISO 21952-A
G CrMo 2 Si
AWS A5.28
ER90S-B3
Shielding
M20, M21
Positions
PA, PB, PC, PD, PE, PF
Current
DC+
Packaging Type
Drums, B300, D200 and D100 spools.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
4
Chem. Comp. %
DEFAULT
C
0.08
Mn
0.6
Ni
0.08
Cr
2.4
P
0.01
S
0.01
Mo
0.8
Si
0.5
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
620
640
Yield strength Rp0.2 MPa
400
540
Elongation A (L0=5d0) %
15
21
Impact Charpy ISO-V
47J @ 20°C
150J @ 20°C
Impact Charpy ISO-V
-
-
Welding Parameters
1 mm
1.2 mm
Ampere
180A - 240A
190A - 250A
Voltage
22V - 29V
26V - 30V
Packaging
Ø 0,8÷1,6mm
Ø 0,8÷1,6mm
Packaging Type
Drums, B300, D200 and D100 spools.
Drums, B300, D200 and D100 spools.
Description

Application

Engineered for extended high-temperature use, reaching up to 600°C, these consumables find primary applications in steam-generating power plants. They excel in various components, such as piping, turbine castings, steam chests, valve bodies, and boiler superheaters. Some also serve in refineries, ensuring corrosion resistance to sulfur-bearing crude oil within the range of 250-450°C. In the chemical and petrochemical industries, they resist hydrogen attack during the fabrication of hydrocrackers, coal liquefaction plants, and NH3 pressure vessels (up to 450°C). In their as-welded state, these consumables yield a valuable 300HV hardness weld deposit suitable for build-up or hard surfacing, effectively countering metal-to-metal wear, heavy impact, and aiding in the repair of P20 mold steel. Maintaining a minimum preheat and interpass temperature of 250°C, rising to 300°C for thick sections, is crucial throughout the welding cycle and post-welding. Unless specified for unique applications, post-weld heat treatment (PWHT) is always necessary, typically at 690°C, with the duration contingent on section thickness.

Alloy Type

2¼Cr-1Mo alloyed steel consumables for elevated temperature service.

Microstructure

After PWHT, the microstructure consists of tempered bainite.

Materials


EN W.Nr.: 11 CrMo 9-10 (1.7383), 10 CrMo 9-10 (1.7380), GS-18CrMo 9 10 (1.7379), GS-12CrMo 9 10 (1.7380), 6CrMo 9 10 (1.7385), 12CrMo 9 10 (1.7375).
ASTM: A387 Gr 21&22, A182 F22, A217 WC9, A234 WP22, A199 T21,T22, A200 T21,T22, A335 P22, A234 WP22.

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