Submerged arc
FERVEO SAW CrMo2 SAW
submerged-arc wireCatalogue only
AWS class
EB 3
EN ISO class
S CrMo2
Classification
| AWS class | EB 3 |
|---|---|
| EN ISO class | S CrMo2 |
Purpose
- 2.5% Cr–1% Mo alloyed, bare solid wire for submerged-arc welding (SAW) (AWS EB 3, EN ISO S CrMo2) — the submerged-arc counterpart to the FERVEO CMO 2 electrode family, P22 grade.
Why it works
Doubling chromium and molybdenum versus FERVEO SAW CrMo1 steps up creep and hot-oxidation resistance once more — the P22 grade is the most widely used Cr-Mo steel in power-plant boilers, here in submerged-arc form.
Fields of application
- P22-grade Cr-Mo steel boilers and tanks, high-volume mechanized submerged-arc welding.
Chemical composition
| Element | Typical, % |
|---|---|
| C | 0.12 |
| Cr | 2.5 |
| Mn | 0.6 |
| Mo | 1 |
| Si | 0.17 |
Mechanical properties
Process
Supply programme
spools B280 / CC300 / K435 / K435/70
Cross-reference
| Replaces OE-CROMO S225 (Oerlikon) | Requires WPS validation |
| Replaces OE-S1 CrMo2 (Oerlikon) | Requires WPS validation |
Equivalence refers to the classification (AWS / EN ISO), not to product identity. In applications with a qualified procedure (WPS), validate the substitution before use.
Base metals
10CrMo9-1012CrMo9-10
Advantages
- One step of creep and hot-oxidation resistance above FERVEO SAW CrMo1 — the most widely used boiler-grade Cr-Mo steel (P22).
- Same base Cr-Mo grade as the FERVEO CMO 2 electrode family.
Limitations
- For higher temperature duty, see FERVEO SAW CrMo5 and CrMo91.