G-TECH 2CrMo

SMAW
  • CREEP RESISTING STEELS
2Cr1Mo

Description

Basic coated electrode for creep resisting 2¼Cr-1Mo steels
Designed for prolonged elevated temperature service up to about 600°C, especially in steam generation power plants (piping, valve bodies, turbine casting, boiler superheaters…). 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. Its basic coating ensures excellent positional welding characteristics with good gap bridging ability.
Specifications
EN ISO 3580-A
E Cr Mo 2 B 32 H5
AWS A5.5
E9018-B3
Shielding
-
Positions
PA, PB, PC, PD, PE, PF
Current
DC+, AC
Packaging Type
Carton box
Asme qualifications
F-No (QW432)
4
A-No (QW442)
4
Chem. Comp. %
0
C
0.07
Mn
0.8
Ni
0.05
Cr
2.25
P
0.015
S
0.01
Mo
1
Si
0.6
Cu
0.05
Mechanical Properties
min
variant
Tensile strength Rm MPa
620
700
Yield strength Rp0.2 MPa
530
520
Elongation A (L0=5d0) %
17
18
Impact Charpy ISO-V
47J
80J @ 20°C
Impact Charpy ISO-V
-
-
Welding Parameters
2.5 mm
3.2 mm
4.0 mm
5.0 mm
Ampere
65A - 90A
90A - 130A
140A - 180A
190A - 230A
Voltage
-
-
-
-
Packaging
45 pcs/kg
21 pcs/kg
14 pcs/kg
10 pcs/kg
Packaging Type
Carton box
Carton box
Carton box
Carton box
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

DO YOU NEED HELP?

Go to our dedicated section or contact us
DAIKO supporting the environment
Questo sito si avvale di cookie necessari al suo funzionamento ed utili alle finalità illustrate nella cookie policy.

Carrello

Il carrello è vuoto