For manufacturers and engineers across Hamilton and beyond, Latham Steel is a trusted local source for high-quality metal solutions. We understand that robust materials are the foundation of any successful project, which is why we take pride in supplying Alloy Steel AISI 4140 bars. Known for its exceptional strength and durability, this versatile steel is a cornerstone in demanding industrial applications, and we are committed to providing our clients with a reliable supply backed by deep technical knowledge and a commitment to local industry.
The composition of AISI 4140 steel is a key to its performance, blending chromium and molybdenum to create a material that excels under stress. After proper heat treatment, these bars develop impressive mechanical properties, including high tensile strength and remarkable toughness. They also offer good wear resistance, making them less susceptible to damage in harsh operating conditions. This balance of strength and durability is what makes 4140 a preferred choice for components that simply cannot afford to fail.
Diameter :Â 8mm-3000mm
Length :Â 3,000-10,000mm
Finish :Â Bright, Polish & Black
Condition :Â Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form :Â Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
| Grade | C | Cr | Si | S | Mn | P | Mo | |
| AISI 4140 | min. | 0.38 | 0.8 | 0.15 | – | 0.75 | – | 0.15 |
| max. | 0.43 | 1.10 | 0.35 | 0.04 | 1.00 | 0.04 | 0.25 | |
| Grade | Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min | Hardness |
| AISI 4140 | 855 | 20 | 621 | 197 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| STANDARD | UNS | WERKSTOFF NR. |
| AISI 4140 | G41400 | 1.7225 |
Because of its reliable strength, AISI 4140 bars are found in some of the most demanding roles across various sectors. They are commonly machined into critical parts like heavy-duty axles, high-strength bolts, and durable gears for industrial machinery. The oil and gas industry relies on them for tools and drill collars, while the automotive sector uses them for high-performance crankshafts and suspension components. Essentially, wherever you need a material that can handle high stress, repeated impact, or significant pressure, 4140 steel is often the go-to solution for long-lasting performance.
Latham 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 Hamilton, New Zealand.
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