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Product Overview
Introduction to Stainless Steel 420 / AISI 420 / UNS S42000
MOKSH TUBES & FITTINGS LLP is a trusted supplier, exporter, importer, and stockist of premium-grade Stainless Steel 420 products, including pipes & tubes, sheets & plates, coils, bars, pipe fittings, flanges, fasteners, wire mesh, and a variety of custom-engineered components.
Stainless Steel 420 is a high-carbon martensitic stainless steel that offers excellent hardenability, good strength, and moderate corrosion resistance. It contains 12–14% chromium, which forms a passive oxide film for protection in mildly corrosive environments.
Unlike austenitic stainless steels, SS 420 can be heat treated to achieve high hardness levels (up to ~50 HRC), making it suitable for cutting tools, surgical instruments, and wear-resistant parts. It is magnetic in all conditions and provides a good balance of strength, edge retention, and machinability.
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Chemical Composition of Stainless Steel 420
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 – 0.40 |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Chromium (Cr) | 12.0 – 14.0 |
| Nickel (Ni) | 0.75 max |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel 420
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength (Annealed) | 620 MPa | 90,000 psi |
| Yield Strength (0.2%) | 345 MPa | 50,000 psi |
| Elongation | 20% | 20% |
| Hardness (Annealed) | 180 HB | 180 HB |
| Hardness (Hardened) | 45 – 50 HRC | 45 – 50 HRC |
👉 SS 420 can reach high hardness after heat treatment, making it ideal for cutting tools and wear-resistant components.
Products in Stainless Steel 420
MOKSH TUBES & FITTINGS LLP, with extensive experience in high-carbon martensitic stainless steel grades and a well-established global supply network, offers an extensive range of STAINLESS STEEL 420 products. These are widely used in wear-resistant, cutting, and precision engineering applications across industries including Surgical Tools, Cutlery Manufacturing, Automotive, Aerospace, Oil & Gas, Industrial Equipment, and General Engineering. SS 420 is valued for its excellent hardenability, high strength, and dependable performance under mechanical stress.
All Stainless Steel 420 products conform to ASTM A276 / A580 / A484 / A473 and other relevant international standards.
Uses and Advantages
Excellent hardenability and strength after heat treatment
Good edge retention – ideal for cutting instruments
Magnetic in all conditions
Moderate corrosion resistance in mild environments
Machinable and polishable to a mirror finish
Good wear and abrasion resistance after hardening
Applications of Stainless Steel 420
STAINLESS STEEL 420 is used where high strength, hardness, and moderate corrosion resistance are required:
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ’s – 420 Stainless Steel
What is 420 Stainless Steel?
420 is a high-carbon martensitic stainless steel known for good hardness, corrosion resistance, and excellent polishability, often used for cutting tools and precision instruments.
What are its key properties?
High hardness after heat treatment, good wear resistance, good corrosion resistance, and good machinability.
Where is it used?
Cutlery, surgical instruments, bearings, valve parts, and precision tools.
Is it weldable?
Welding is possible but limited; preheating and post-weld heat treatment are recommended.
Why choose Mokshtubes?
Mokshtubes offers premium 420 stainless steel with guaranteed quality, precision manufacturing, and reliable global delivery.
Contact Us
For any inquiries or to request a quote, reach out to Moksh Tubes & Fittings LLP – your trusted partner for stainless steel 420 products.
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