U 50 CrMo (G VI)
Gas welding rods for mild and low alloyed steel

Classification DIN EN

20378 - VI

Material No.

1.7305

Classification AWS

A5.2 ~R65

Approvals

-

Characteristics and application

Rod for gas welding of high temperature creep resistant 2.25%Cr-1%Mo ferritic steel, i.e. P21/P22. These steels are used for creep resisting applications up to ~600°C. Typical applications in power generation plant include steam piping, turbines and boilers; the alloy also finds applications in the chemical and petro-chemical industries.

Base materials

For matching 2.5%Cr-1%Mo creep resisting ferritic steels.
10CrMo 9-10, 12CrMo 9-10, G-17CrMo 9 10
ASTM: A182 grade F22, A199/A200 grades T21/T22, A213 grade grade T22, A217 grade WC9, A234 grade WP22, A335 grade P22, A387 grades 21/22

Typical analysis in %

C: 0,08
Si: 0,15
Mn: 0,55
Cr: 2,10
Mo: 1,00

Yield strength in Mpa

≥ 340

Tensile strength in Mpa

≥ 520

Elongation in %

4d/5d: ≥18

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

RT ≥ 60

Typical heat treatment

Preheat temperature: 200°C
Interpass temperature: max. 300°C
PWHT: 690°C

Other products

SAW: UP-99 CrMo 2 or UP-100 CrMo 2
MIG/GMAW: ED-SG CrMo 2 or ED-ER90S-B3
TIG/GTAW: WSG CrMo 2 or WSG ER90S-B3