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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.
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Chemical Composition of SS 440A
| 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 |
👉 The balanced chromium and carbon content provides corrosion resistance, edge retention, and wear resistance.
Mechanical Properties of SS 440A
| 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 (Annealed) | 223 HB | 223 HB |
| Hardness (Hardened) | 54 – 58 HRC | |
👉 440A responds well to quenching and tempering, making it ideal for cutting tools and wear-resistant parts.
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.
Uses and Advantages of 440A stainless steel
High Surface Hardness
Achieves superior surface hardness after heat treatment for excellent durability and longevity.
Good Corrosion Resistance
Performs reliably in mild atmospheric, freshwater, and industrial environments.
Magnetic Properties
Exhibits magnetism in both annealed and hardened conditions, ideal for applications requiring magnetic response.
Excellent Wear Resistance
Provides high edge retention and resistance to abrasion, making it suitable for cutting and tooling purposes.
Heat-Treatable Alloy
Can be heat treated for improved strength, toughness, and performance under demanding mechanical conditions.
Easy to Machine and Polish
Suitable for machining, grinding, and polishing, ensuring precise finish and dimensional control.
Applications of Stainless Steel 440A
Stainless Steel 440A is widely used in industries and applications where exceptional hardness, sharp edge retention, wear resistance, and moderate corrosion protection are required.
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ’s – 440A Stainless Steel
What is 440A Stainless Steel?
440A is a high-carbon martensitic stainless steel known for excellent hardness, edge retention, and corrosion resistance.
What are its key properties?
High strength, good polishability, wear resistance, and moderate corrosion resistance after hardening.
Where is it used?
Commonly used in knives, surgical instruments, bearings, and cutting tools.
Is it weldable?
Weldable with care, though preheating and post-weld heat treatment are recommended to avoid cracking.
Why choose Mokshtubes?
Mokshtubes offers premium 440A stainless steel with consistent quality and precision for industrial and engineering use.
Contact Us
For any inquiries or to request a quote, reach out to Moksh Tubes & Fittings LLP – your trusted partner for Stainless Steel 440A products.
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