TIG welding rods for creep resisting steels

Classification DIN EN ISO

21952-A W ZCrMo2VNb

Material No.


Classification AWS

A5.28 R90S-B24


TÜV 11949, CE

Characteristics and application

TIG/GTAW rod for T24 creep resistant steel. The T24 alloy is a modified 2.25%Cr1%Mo alloy with additions of Nb and V to improve high temperature creep performance. The alloy finds use for waterwalls in ultra-super-critical (USC) boilers in the power generating industry.

Base materials

For matching alloy 24, 2.5%Cr1%Mo modified, creep resisting ferritic steels.
X7CrMoVTiB 10-10
ASTM: A213 T24

Typical analysis in %

C: 0,10
Si: 0,25
Mn: 0,90
Cr: 2,30
Mo: 1,00
V: 0,30
Nb: 0,02

Yield strength in Mpa

≥ 600

Tensile strength in Mpa

≥ 700

Elongation in %

4d/5d: ≥15

Charpy-V-Value (ISO-V) in J

RT ≥ 47

Typical heat treatment

Preheat temperature: Dependent on application either none or 150-200°C
Interpass temperature: max. 300°C
PWHT: Dependent on application either AW or 730°C - 760°C

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