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Product Overview
INTRODUCTION TO STAINLESS STEEL 420HC / UNS S42000 / AISI 420HC
MOKSH TUBES & FITTINGS LLP is a trusted supplier, exporter, importer, and stockist of a wide range of Stainless Steel 420HC products including Pipes & Tubes, Sheets & Plates, Coils, Bars, Wires, Pipe Fittings, Flanges, Fasteners, and Custom Fabricated Components.
Stainless Steel 420HC is a high-carbon martensitic stainless steel and a modified version of the standard 420 grade, designed with increased carbon content for enhanced hardness and wear resistance. The “HC” stands for High Carbon, giving the alloy the capability to reach hardness levels up to approximately 56 HRC after proper heat treatment—higher than conventional 420.
This grade is recognized for its excellent polishability, good corrosion resistance in mild environments, and superior edge retention. These properties make it a preferred choice in the manufacturing of cutlery, surgical instruments, valve components, precision tools, and mechanical parts that demand a balance of strength and cost-effectiveness.
420HC Stainless Steel can be readily hardened by heat treatment and responds well to quenching and tempering processes. It also offers good machinability in the annealed condition. While its corrosion resistance is somewhat lower than that of austenitic stainless steels like 304, it performs effectively in fresh water, air, and mild chemical environments, combining durability with affordability.
Chemical Composition of 420HC stainless steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.40 – 0.50 |
| Chromium (Cr) | 12.00 – 14.00 |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Nickel (Ni) | 1.00 (typical) |
| Iron (Fe) | Balance |
Technical Composition
Physical Properties of 420HC stainless steel
| Property | Value |
|---|---|
| Density | 7.70 g/cm³ |
| Melting Point | 1450 °C (2640 °F) |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 24.9 W/m·K at 100 °C |
| Specific Heat | 460 J/kg·K at 0–100 °C |
| Electrical Resistivity | 0.55 µΩ·m at 20 °C |
Mechanical Properties of 420HC stainless steel
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 700 – 850 MPa | 102,000 – 123,000 psi |
| Yield Strength (0.2% Offset) | 500 – 600 MPa | 72,500 – 87,000 psi |
| Elongation at Break (50 mm) | 15 – 20 % | 15 – 20 % |
| Hardness, Rockwell C | 52 – 56 HRC | 52 – 56 HRC |
| Impact Toughness | Moderate | Moderate |
Products in Stainless Steel 420HC
With our specialized manufacturing capabilities and extensive global sourcing network, MOKSH TUBES & FITTINGS LLP offers a comprehensive range of high-performance Stainless Steel 420HC products designed for diverse industrial and commercial applications. Known for its excellent hardness, polishability, and wear resistance, 420HC Stainless Steel serves as an ideal material for high-precision and durable components.
We offer Stainless Steel 420HC in a wide range of product forms, engineered for maximum strength, durability, and reliability.
