Luke Steel in Houston is a top supplier of Alloy Steel F911 Bars. These high-strength materials are designed for high-temperature and pressure applications. They are recognized for their excellent creep resistance, oxidation resistance, and superior fatigue properties. These bars are ideal for industries like power generation, petrochemical, and aerospace. Manufactured to meet international standards, Alloy Steel F911 Bars from Luke Steel guarantee reliability and a long service life, even under harsh conditions.
Alloy Steel F911 Bars are formed from chromium, molybdenum, and vanadium, which provide strong high-temperature strength and oxidation resistance. The typical chemical makeup includes 9% chromium, 1% molybdenum, and 0.2% vanadium. Mechanical properties include yield strength around 450 MPa, tensile strength of 700–900 MPa, and elongation of 20–30%. This material can handle temperatures up to 600 °C with good resistance to thermal fatigue and creep deformation. Its microstructure supports long-term performance in demanding applications.
Diameter : 8mm-3000mm
Length : 3,000-10,000mm
Finish : Bright, Polish & Black
Condition : Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form : Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
| Grade Symbol | UNS Number | Alloy | Elements | Composition % |
|---|---|---|---|---|
| F911 | K91061 | 9% chromium, 1% molybdenum, 0.2% vanadium plus columbium and nitrogen | Carbon | 0.09 – 0.13 |
| Manganese | 0.30 – 0.60 | |||
| Phosphorus | 0.020 max | |||
| Sulfur | 0.010 max | |||
| Silicon | 0.10 – 0.50 | |||
| Nickel | 0.40 max | |||
| Chromium | 8.5 – 9.5 | |||
| Molybdenum | 0.90 – 1.10 | |||
| Columbium | 0.060 – 0.10 | |||
| Tungsten | 0.90 – 1.10 | |||
| Aluminium | 0.02 max | |||
| Nitrogen | 0.04 – 0.09 | |||
| Vanadium | 0.18–0.25 | |||
| Boron | 0.0003 – 0.006 | |||
| Titanium | 0.01 max | |||
| Zirconium | 0.01 max |
| Property | Value |
|---|---|
| Tensile Strength, min, ksi [MPa] | 90 [620] |
| Yield Strength, min, ksi [MPa] | 64 [440] |
| Elongation in 2 in. [50mm] or 4D, min, % | 18 |
| Reduction or Area, min, % | 40 |
| Brinell Hardness Number, HBW | 187-248 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Alloy Steel F911 Bars are crucial in making power plant valves, steam turbines, heat exchangers, and high-temperature piping systems. Their high creep rupture strength makes them suitable for essential components in fossil fuel power plants, where prolonged heat and pressure exposure is common. F911 is also widely used in petrochemical reactors and aerospace parts that need high-performance materials for durability under extreme thermal cycling and stress conditions. Luke Steel offers customized sizes and machining abilities to meet specific customer needs.
Luke Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Houstan, USA.
Copyright 2025 Luke Steel. All rights reserved
