🟧 Product Overview
420 stainless steel is a high‑hardness martensitic stainless steel widely used in cutting tools and wear‑resistant applications. It offers:
- Very high hardness after quenching
- Excellent wear resistance
- Good mechanical strength
- Moderate corrosion resistance
- Magnetic properties
- Suitable for precision machining and heat treatment
Because of its high carbon content, 420 is the standard material for knives, scissors, surgical tools, and industrial blades.
🟧 Key Features
- Can reach high hardness levels (HRC 48–52)
- Excellent wear resistance
- Good edge retention for cutting tools
- Heat‑treatable for enhanced performance
- Magnetic martensitic structure
- Cost‑effective compared to high‑end tool steels
🟧 Standards
- ASTM A240 / A480
- JIS G4304 / G4305 (SUS420J1 / SUS420J2)
- EN 10088‑2 (1.4021 / 1.4031 / 1.4034)
- GB/T 3280
🟧 Chemical Composition (Typical)
| Element | 420 (%) |
|---|
| C | 0.16–0.25 |
| Cr | 12.0–14.0 |
| Ni | ≤0.75 |
| Mn | ≤1.0 |
| Si | ≤1.0 |
| S | ≤0.03 |
| Fe | Balance |
Note: The higher carbon content is the key factor behind 420’s excellent hardness and wear resistance.
🟧 Mechanical Properties (Typical)
| Property | Value |
|---|
| Yield Strength | ≥275 MPa |
| Tensile Strength | ≥700 MPa |
| Hardness (HRC) | 48–52 (after heat treatment) |
🟧 Product Specifications
Thickness
Width
Surface Finishes
🟧 Applications
- Knives
- Scissors
- Industrial blades
- Cutting tools
- Surgical instruments
- Dental tools
- Precision mechanical parts
Wear‑Resistant Components
- Shafts
- Bearings (low‑load)
- Wear plates
🟧 Why Choose WelSteels
- Professional supply of 420 stainless steel coil
- High‑hardness, wear‑resistant martensitic grade
- Stable heat‑treatable performance
- SGS / BV inspection available
- Export‑grade seaworthy packaging
