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420 Stainless Steel Plate
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420 stainless steel plate is a martensitic stainless steel with higher carbon content, designed for high hardness, wear resistance, and cutting performance. It is widely used after heat treatment to achieve strong mechanical properties, especially in applications requiring sharp edges or abrasion resistance.
Compared with 410 stainless steel, 420 offers significantly higher hardness but slightly lower toughness and corrosion resistance.
Chemical Composition of 420 Stainless Steel
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 12.0 – 14.0 |
| Carbon (C) | 0.15 – 0.40 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
| Iron (Fe) | Balance |
Key Feature
The higher carbon content is the key factor that allows 420 stainless steel to achieve high hardness after heat treatment.
420 vs 410 Stainless Steel – Key Comparison
| Feature | 420 Stainless Steel | 410 Stainless Steel |
|---|---|---|
| Carbon Content | Higher (0.15–0.40%) | Lower (≤0.15%) |
| Hardness | Higher (after heat treatment) | Medium |
| Wear Resistance | Excellent | Moderate |
| Strength | Higher | Good |
| Toughness | Lower | Better |
| Corrosion Resistance | Slightly lower | Better |
| Machinability | More difficult | Easier |
Key Properties of 420 Stainless Steel Plate
1. High Hardness (Heat Treated Condition)
- Can reach high hardness after quenching and tempering
- Suitable for cutting tools and wear-resistant parts
2. Excellent Wear Resistance
- Strong resistance to abrasion and surface wear
- Ideal for friction and contact components
3. Moderate Corrosion Resistance
- Suitable for mild environments
- Less resistant than 410 due to higher carbon content
4. Good Strength Performance
- High mechanical strength after heat treatment
- Suitable for structural and functional parts
Key Properties of 410 Stainless Steel (Reference)
- Lower carbon content
- Better toughness and ductility
- Easier machining and forming
- More balanced corrosion resistance
- Used in general-purpose applications
Common Applications of 420 Stainless Steel Plate
1. Cutting and Tool Components
- Knives and blades
- Surgical instruments
- Cutting tools
2. Industrial Wear Parts
- Wear-resistant machine components
- Valve seats
- Pump parts
3. Mechanical Engineering
- Shafts
- Precision mechanical parts
- High-strength fittings
4. Mold and Die Industry
- Plastic molds
- Light-duty dies
- Forming tools
Advantages of 420 Stainless Steel Plate
- High hardness after heat treatment
- Excellent wear resistance
- Good strength performance
- Suitable for precision cutting applications
- Cost-effective for hardened stainless steel use
Limitations Compared to 410
- Lower toughness
- Reduced corrosion resistance
- More difficult to machine
- Not suitable for highly corrosive environments
Teda Ganghua – Supply Capability
Teda Ganghua supplies 420 stainless steel plates with stable quality and machining support:
- Multiple thickness and size options
- Heat-treatment ready materials
- Precision cutting and fabrication services
- Strict quality inspection system
- Export packaging and logistics support
With strong processing capability, Teda Ganghua provides reliable stainless steel solutions for wear-resistant and precision industrial applications.
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Tel: +86 22 86896631
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