“Low alloy” refers to steel with an alloy composition of 1 to 1 1/2% chromium and molybdenum. The small amount of chromium and molybdenum differentiates the alloy from carbon steel. Alloy elements strengthen the product for use in temperatures and pressures that would cripple carbon steel. Typical temperatures applications range from -20° to 1050° F.
Availability – P11
Seamless Pipe: 1/2” – 24”
Butt-Weld Fittings: 1/2” – 24” Cl. 1
Flanges: 1/2” – 24” Pressure
Fittings: 1/8” – 4”
Specifications – P11
| ASTM/ASME | A335, A182, A234 |
Chemical Composition -P11
| C | Cr | Mn | Mo | P | S | Si |
|---|---|---|---|---|---|---|
| Max | Max | Max | Max | Max | ||
| .05% – .15% | 1.00% – 1.50% | .30% – .60% | .44% – .60% | 0.030% | 0.030% | .50% – 1.00% |
Typical Applications – P11
- Extraction steam lines
- Crude distillation units
Tensile Requirements -P11
Tensile Strength (KSI): 60
Yield Strength (KSI): 30
KSI can be converted to MPA (Megapascals) by multiplying by 6.895.