ASTM A213-T91 is a high-strength alloy steel tube used primarily for high-temperature service in power generation and petrochemical industries. Hebei K-Steel Pipe Industry is in the supplier list of PETROCHINA It is a chromium-molybdenum (Cr-Mo) ferritic steel, known for excellent creep strength, oxidation resistance, and thermal stability.
Element | Content (%) |
|---|
Carbon (C) | 0.08–0.12 |
Manganese (Mn) | 0.30–0.60 |
Phosphorus (P) | ≤0.020 |
Sulfur (S) | ≤0.010 |
Silicon (Si) | 0.20–0.50 |
Chromium (Cr) | 8.00–9.50 |
Molybdenum (Mo) | 0.85–1.05 |
Nickel (Ni) | 0.40 max |
Vanadium (V) | 0.18–0.25 |
Nitrogen (N) | 0.06–0.12 |
Property | Typical Value |
|---|
Tensile Strength | 585–690 MPa |
Yield Strength | 415–450 MPa |
Elongation | ≥20% |
Hardness (HRB) | 197–217 |
Applications
Boiler tubes in power plants
Superheater and reheater tubes
High-temperature piping in refineries and chemical plants
Heat exchangers subjected to creep and oxidation
Key Features
High resistance to creep deformation at elevated temperatures (up to ~600 °C).
Good oxidation and corrosion resistance in high-temperature steam environments.
Excellent weldability when proper procedures are followed.
Compatible with ferritic heat treatments to improve strength.
