DAIKOFCW 1CrMoV

FCAW
  • CREEP RESISTING STEELS
CrMoV

Description

Rutile all position flux cored wire for 1¼Cr-1Mo-¼V creep resisting alloy for elevated temperature service
1¼Cr-1Mo-¼V rutile flux cored wire used for welding high temperature steels of similar composition. These alloys provide good creep rupture properties up to about 580°C. Widely used in valve casings and steam turbines, boilers, pressure vessels and in the power generation and petrochemical industries. The easy handling and the high deposition rate result in high productivity, excellent welding performance and very low spatter formation.
Specifications
AWS A5.36
E91T1-C1(M21)PZ-G
Shielding
M21, C1
Positions
PA, PB, PC, PD, PE, PF
Current
DC+
Packaging Type
BS300 spool
Asme qualifications
F-No (QW432)
6
A-No (QW442)
-
Chem. Comp. %
DEFAULT
C
0.13
Mn
0.8
Ni
0.1
Cr
1.3
V
0.25
P
0.1
S
0.1
Mo
1.1
Si
0.3
Cu
0.1
Mechanical Properties
min
variant
Tensile strength Rm MPa
620
640
Yield strength Rp0.2 MPa
540
540
Elongation A (L0=5d0) %
18
18
Impact Charpy ISO-V
-
-
Impact Charpy ISO-V
-
-
Welding Parameters
1.2 mm
1.6 mm
Ampere
100A - 300A
160A - 420A
Voltage
16V - 28V
31V - 35V
Packaging
Ø 1,2÷1,6mm
Ø 1,2÷1,6mm
Packaging Type
BS300 spool
BS300 spool
Description

Application

CrMoV base materials exhibit noteworthy creep rupture properties up to approximately 580°C, coupled with a reasonable level of corrosion resistance in superheated steam environments. These materials find common applications in various sectors, including valve casings and steam turbines, as well as general use in boilers and pressure vessels within the power generation and petrochemical industries. The presence of vanadium in these materials enhances the tempering stability of quenched steel, introducing a secondary hardening effect. Additionally, vanadium contributes to grain refinement, increases strength, improves the yield ratio, enhances low-temperature toughness after normalizing, and betters the welding performance of standard low-alloy steel. Adherence to specifications for preheating and post-weld heat treatment is crucial, aligning with the requirements of the base materials.

Alloy Type

1¼%Cr-½%Mo alloyed steel consumables for elevated temperature service with addition of vanadium.

Microstructure

After PWHT, the microstructure consists of tempered bainite.

Materials


EN W.Nr.: G17CrMoV5-10 (1.7706), 21 CrMoV 5 11 (1.8070), 15 CrMoV 5 10 (1.7745), GS-17CrMo 5 11 (1.7706) (cast).
ASTM: A389 gr. C24 (cast), A356 gr. 9 (cast).

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