As a trusted manufacturer and supplier based in the heart of Naypyidaw, Naing Steel takes pride in producing high-quality Alloy Steel AISI 4140 bars that meet the rigorous demands of modern industry. We understand that the backbone of any great project is reliable materials, which is why our 4140 bars are crafted with precision and consistency, offering the superior strength and durability that professionals across Myanmar have come to depend on for their most critical applications.
The composition of AISI 4140 is a key to its performance, blending chromium and molybdenum to create a remarkable balance of strength, toughness, and wear resistance. This alloy responds exceptionally well to heat treatment, allowing its mechanical properties to be tailored. In its hardened and tempered condition, it typically achieves a high tensile strength and good ductility, making it a versatile choice where both power and a degree of flexibility are required.
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 |
You’ll find AISI 4140 bars hard at work in some of the most demanding roles. They are commonly machined into vital components like heavy-duty axles, shafts, and gears for the automotive and transportation sectors. The oil and gas industry relies on them for drill collars, while general manufacturing uses them for fixtures, molds, and tooling. Their excellent strength-to-weight ratio also makes them ideal for structural parts in machinery and equipment, proving indispensable wherever resilience under stress is non-negotiable.
Naing 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 Naypyidaw, Myanmar.
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