Luke Steel, a trusted metal supplier in Houston, offers Alloy Steel 4140 Foil that is precision-engineered for industrial and commercial applications requiring strength, machinability, and resistance to fatigue. 4140 is a chromium-molybdenum steel that balances hardness and toughness, making it ideal for thin, high-performance foil materials used in aerospace, automotive, defense, and tool manufacturing. Made with tight dimensional tolerances, Luke Steel’s 4140 Foil comes in various widths and thicknesses. Its consistent quality, mechanical strength, and excellent surface finish make it perfect for forming, stamping, and CNC operations that need long-term structural and surface performance.
Alloy Steel 4140 has about 0.40% carbon, 1% chromium, and 0.2% molybdenum, providing high strength, hardenability, and wear resistance. The foil form offers a tensile strength of 850 to 1000 MPa and a yield strength of around 655 MPa. It retains toughness after heat treatment and has excellent resistance to fatigue and impacts. The foil maintains surface hardness while remaining formable and easy to machine. Its uniform microstructure ensures stability in thin-gauge applications. With good ductility and resistance to bending under load, 4140 foil is suited for precision-engineered parts and high-performance applications.
| Specifications | : | ASTM A387 / ASME SA387 |
| Thickness | : | 1mm-300mm |
| Width | : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, 4050mm etc |
| Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, 12000mm, 15000mm etc |
| Surface | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish | : | Hot rolled plate (HR), Cold rolled sheet (CR) |
| Form | : | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Strip etc. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| Alloy Steel 4140 | 0.15 max | 0.30-0.60 | 1.0 max | 0.030 max | 0.030 max | 8.0 – 10.0 | 0.90 – 1.10 | – | – |
| Tensile (MPa) | Yield (MPa) | Elongation (50mm) | Elongation (200mm) | Reduction of Area |
| 415 – 585 | 205 min | 18% min | – | 40% min |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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
