DAIKOWT 1CrMo

GTAW
  • CREEP RESISTING STEELS
1CrMo

Description

Solid rod for creep resisting 1¼Cr- ½Mo steels
Wire rod for prolonged elevated temperature service up to about 550°C, especially in steam generation power plants. 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. The wire has low levels of tramp elements (Sn, As, Sb and P) providing a low Bruscato Factor (X< 12 ppm) for temper embrittlement resistant applications.
Specifications
ISO 21952-B
W 1 CM
AWS A5.28
ER80S-B2
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
6
A-No (QW442)
3
Chem. Comp. %
DEFAULT
C
0.08
Mn
0.6
Ni
0.04
Cr
1.3
P
0.008
S
0.01
Mo
0.5
Si
0.55
Cu
0.15
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
610
Yield strength Rp0.2 MPa
470
500
Elongation A (L0=5d0) %
19
22
Impact Charpy ISO-V
-
100J @ 20°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.6 mm
2.4 mm
Ampere
95A - 135A
145A - 205A
Voltage
-
-
Packaging
Ø 1,2÷3,2mm
Ø 1,2÷3,2mm
Packaging Type
5kg carton tube
5kg carton tube
Description

Application

Designed for prolonged elevated temperature service up to 550°C, these consumables have primary applications in steam-generating power plants. These consumables excel in various components like piping, turbine castings, steam chests, valve bodies, and boiler superheaters. They also provide corrosion resistance in refineries for sulfur-bearing crude oil (250-450°C) and resist hydrogen attack in chemical and petrochemical industries for hydrocrackers, coal liquefaction plants, and NH3 pressure vessels (up to 450°C). In the as-welded state, these consumables yield a weld deposit with a useful 300HV hardness, suitable for build-up or hard surfacing to combat metal-to-metal wear and heavy impact. A minimum preheat and interpass temperature of 200°C is recommended, extending up to 300°C for thicker sections. It is crucial to maintain these temperatures throughout the welding cycle and for some time after the completion of welding. With the exception of specific applications, post-weld heat treatment (PWHT) is invariably necessary, typically at a temperature of 690°C, the duration of which depends on the thickness of the section.

Alloy Type

1¼Cr-½Mo alloyed steel consumables for elevated temperature service.

Microstructure

After PWHT, the microstructure consists of tempered bainite.

Materials


EN W.Nr.: 13CrMo 4-5 (1.7355), 13CrMo 4-4 (1.7335), 16CrMo 4-4 (1.7337), 11CrMo 5-5 (1.7339), GS-25CrMo 4 (1.7128), GS-17CrMo 5-5 (1.7357).
ASTM: A387 Gr 11 & 12, A182 F11 & F12, A217 WC6 & WC11, A234 WP11 & WP12, A199 T11, A200 T11, A213 T11 & T12, A335 P11 & P12.

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