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Product Overview
INTRODUCTION TO STAINLESS STEEL 440A / AISI 440A / UNS S44002
MOKSH TUBES & FITTINGS LLP is a leading supplier, exporter, importer, and stockist of a comprehensive range of Stainless Steel 440A products, including Pipes & Tubes, Pipe Fittings, Flanges, Fasteners, Sheets & Plates, Coils, Wires, Round Bars, Flat Bars, Angles, Channels, Wire Mesh, and other custom or hard-to-find 440A components.
Stainless Steel 440A is a high-carbon martensitic stainless steel that delivers an excellent balance between hardness, strength, and corrosion resistance. This alloy contains more chromium than Type 410, enhancing its corrosion resistance, while the higher carbon content provides increased wear resistance and edge retention. It is suitable for applications requiring strong mechanical performance combined with hardness and polishability.
440A stainless steel is magnetic in all conditions and can be hardened through conventional heat treatment processes. This property makes it ideal for the manufacture of cutting tools, blades, valve parts, and components that require both high surface hardness and dimensional stability. It also performs exceptionally well in environments with moderate corrosion exposure.
Among the 440 stainless steel series (440A, 440B, and 440C), 440A offers the best corrosion resistance while maintaining excellent machinability in the annealed condition. Its ability to combine hardness, strength, and cost-efficiency makes it one of the most reliable martensitic grades for industrial and commercial use.
Chemical Composition of 440A Stainless steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.60 – 0.75 |
| Manganese (Mn) | 1.00 |
| Silicon (Si) | 1.00 |
| Phosphorus (P) | 0.04 |
| Sulfur (S) | 0.03 |
| Chromium (Cr) | 16.0 – 18.0 |
| Molybdenum (Mo) | 0.75 |
| Iron (Fe) | Balance |
Technical Composition
Physical Properties of 440A stainless steel
| Property | Value |
|---|---|
| Density | 7.65 g/cm³ |
| Melting Point | 1480 – 1530 °C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 24 W/m·K (100 °C) |
| Electrical Resistivity | 0.60 µΩ·m |
| Magnetic Properties | Fully Magnetic (Martensitic) |
Mechanical Properties of 440A stainless steel
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 655 – 895 MPa | 95,000 – 130,000 psi |
| Yield Strength (0.2%) | 415 MPa | 60,000 psi |
| Elongation | 20% | 20% |
| Hardness (Brinell) | 223 HB | 223 HB |
| Hardness (Rockwell C) – Hardened & Tempered | 54 – 58 HRC | 54 – 58 HRC |
Products in Stainless Steel 440A
MOKSH TUBES & FITTINGS LLP, with decades of experience in high-carbon stainless steels, supplies Stainless Steel 440A in a comprehensive range of product forms. Known for its high strength, wear resistance, and precision heat-treating properties, 440A is ideal for diverse industrial, mechanical, and specialty applications.
All products are manufactured and supplied as per ASTM A276 / A314 / A580 and equivalent international standards to ensure superior performance, reliability, and precision.
