DAIKOWS 2CrMo

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  • CREEP RESISTING STEELS
2Cr1Mo

Description

Solid wire for creep resisting 2¼Cr-1Mo steels
Submerged arc welding 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
EN ISO 24598-A
S CrMo2 FB
AWS A5.23
EB3
Shielding
DAIKOFLUX 982
Positions
PA, PB, PC
Current
DC/AC
Packaging Type
K415 spool and drums.
Asme qualifications
F-No (QW432)
6
A-No (QW442)
4
Chem. Comp. %
DEFAULT
C
0.06
Mn
0.7
Cr
2.2
P
0.01
S
0.01
Mo
1
Si
0.2
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
500
550
Yield strength Rp0.2 MPa
400
380
Elongation A (L0=5d0) %
18
24
Impact Charpy ISO-V
47J @ 20°C
90J @ 20°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.4 mm
3.2 mm
4.0 mm
Ampere
350A - 450A
430A - 530A
480A - 580A
Voltage
27V - 31V
27V - 31V
27V - 31V
Packaging
Ø 2,0÷4,0mm
Ø 2,0÷4,0mm
Ø 2,0÷4,0mm
Packaging Type
K415 spool and drums.
K415 spool and drums.
K415 spool and drums.
Description

Application

The 2Cr1Mo consumables are designed to ensure durability and performance at high temperatures, up to 600 °C. These materials are widely used in steam power plants, essential for the construction of pipework, turbine casings, steam chambers, valve bodies, and boiler superheaters. Additionally, they are used in refineries for their resistance to corrosion caused by sulfur-containing crude oil, effectively operating at temperatures between 250 and 450 °C. In the chemical and petrochemical industry, these materials are crucial for resisting hydrogen attack. They are employed in the manufacture of hydrocrackers, coal liquefaction plants, and NH₃ pressure vessels operating up to 450 °C. Under welding conditions, the materials offer deposits with a hardness of 300 HV, ideal for build-up or hardfacing, metal-to-metal wear resistance, heavy impact, and repairs of P20 tool steel. A minimum preheat and interpass temperature of 250 °C is recommended, increased up to 300 °C for sections of considerable thickness, maintaining the temperature throughout the welding cycle and subsequently. Unless otherwise specified, it is imperative to perform post-weld heat treatment (PWHT), generally carried out at 690 °C, with duration varying based on the 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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