Description
Alloy F11, also referred to as 1 1/4 Cr 1/2 Mo, is a chromium-molybdenum steel used in high-temperature service, including boiler, steam, petrochemical, and power-generation applications. It is covered under the ASTM A335 (seamless ferritic alloy-steel pipe for high-temperature service) and corresponding flange/fitting standards such as ASME/ASTM A182 F11 and ASTM A234 WP11.
F11 Certified Chemical Composition:
| Element | Composition |
| Al | 0.018% |
| Sb | 0.0017% |
| As | 0.0048% |
| B | 0.0004% |
| C | 0.114% |
| Cr | 1.349% |
| Co | 0.0062% |
| Cu | 0.123% |
| Mn | 0.530% |
| Mo | 0.614% |
| Ni | 0.069% |
| P | 0.0067% |
| Si | 0.679% |
| S | 0.0141% |
| Sn | 0.0084% |
| Ti | 0.0015% |
| V | 0.0038% |
Industry Chemical Range: F11 / 1.25Cr 0.5Mo
|
Grade |
UNS |
Chemical Composition % |
||||||
|
F11 or 1.25Cr 0.5Mo |
K11572 |
C |
Cr |
Mn | Mo | P | S | Si |
|
0.05-0.15% |
1.0-1.5% |
0.30-0.60% | 0.44-0.65% | 0.030-0.040% | 0.040% max | 0.50-1.00% | ||
Other names for F11:
P11, WP11, 1.25Cr0.5Mo, UNS K11572
Available material forms:
- XRF: 1/8" thick disc, 1.5" diameter
- OES: 0.75" thick disc, 1.5" diameter
- Chips: 100g of chips
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