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Product Overview
Introduction to Stainless Steel 431 / Alloy 431 / UNS S43100
Stainless Steel 431 (UNS S43100) is a high-strength martensitic stainless steel known for its excellent corrosion resistance, toughness, and superior tensile strength. It is widely used in aerospace, marine, chemical, and automotive applications where both strength and corrosion resistance are key.
MOKSH TUBES & FITTINGS LLP supplies and stocks an extensive range of Stainless Steel 431 products, including pipes, tubes, sheets, plates, coils, flanges, fasteners, bars, rods, and precision-engineered components. It provides high resistance to mild acids, freshwater, and a variety of industrial chemicals. After heat treatment, this grade offers exceptional hardness and mechanical properties, making Stainless Steel 431 one of the most versatile grades in the 400-series category. The Stainless Steel 431 density is approximately 7.75 g/cm³, providing a balance between corrosion resistance, durability, and machinability.
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Chemical Composition of Stainless Steel 431
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 max |
| Chromium (Cr) | 15.0 – 17.0 |
| Nickel (Ni) | 1.25 – 2.50 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Iron (Fe) | Balance |
This chemical balance provides excellent corrosion resistance, while carbon enables high strength after heat treatment.
Mechanical Properties of Stainless Steel 431
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 850 – 1000 MPa | 123,000 – 145,000 psi |
| Yield Strength (0.2%) | 600 – 800 MPa | 87,000 – 116,000 psi |
| Elongation | 18 – 22% | 18 – 22% |
| Hardness (Brinell) | 230 – 300 HB | 230 – 300 HB |
Products in Stainless Steel 431
MOKSH TUBES & FITTINGS LLP, with extensive experience in high-strength martensitic stainless steels and a strong supply network, offers a complete range of STAINLESS STEEL 431 products. These materials are designed for demanding applications in aerospace, marine, chemical, and automotive industries, where superior mechanical performance and corrosion resistance are essential. Our SS 431 offerings meet international quality standards, ensuring reliability, durability, and precision for both critical and general-purpose projects.
All Stainless Steel 431 products conform to ASTM A276, A479, A484, and other internationally recognized specifications.
Uses and Advantages
High strength and hardness after heat treatment
Excellent resistance to freshwater, mild acids, and alkalis
Good corrosion resistance compared to other martensitic grades
Suitable for both quenched and heat-treated conditions
Excellent toughness and durability under mechanical stress
Applications of Stainless Steel 431
STAINLESS STEEL 431 is used across industries that demand high strength, hardness, and corrosion resistance in moderate environments:
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ’s – Stainless Steel 431
What is Stainless Steel 431 used for?
It is widely used in aerospace, marine, oil & gas, and automotive applications due to its strength and corrosion resistance.
Is Stainless Steel 431 magnetic?
Yes, it is a martensitic stainless steel, hence magnetic in nature.
Can Stainless Steel 431 be welded?
Welding is possible but requires pre-heating and post-weld heat treatment to avoid cracking.
How does Stainless Steel 431 compare to 304 or 316?
431 provides higher strength and hardness, but slightly lower corrosion resistance compared to 304/316.
What forms are available in Stainless Steel 431 at Moksh Tubes?
Pipes, tubes, sheets, plates, coils, flanges, fittings, fasteners, bars, rods, and custom-engineered products.
Contact Us
For any inquiries or to request a quote, reach out to Moksh Tubes & Fittings LLP – your trusted partner for stainless steel 431 products.
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