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AISI 420 Stainless Steel Disk
Available Configurations
Properties common to all products in this list
Key Features
AISI 420 Stainless Steel Disk (UNS S42000) is a martensitic stainless steel disk with 12-14% chromium and a carbon content of 0.15-0.40 wt%, offering high hardness after heat treatment, good wear resistance, and moderate corrosion resistance in non-severe environments:
Excellent Edge Retention & Dimensional Stability Under Load
High carbon and chromium content enables excellent edge retention and dimensional stability under compressive and sliding loads, making AISI 420 Disk well suited to cutting tool bases and wear components.
High Hardness After Heat Treatment
High hardness after heat treatment, combined with good wear resistance, suits AISI 420 Disk to bearing and valve seat interfaces subjected to sustained mechanical contact and sliding loads.
Moderate Corrosion Resistance in Non-Severe Environments
Moderate corrosion resistance in non-severe environments supports reliable performance of AISI 420 Disk in cutting tool bases and wear components where environmental exposure is limited.
Suited to Cutting Tool Bases & Wear Components
AISI 420 Disk is well suited to cutting tool bases, bearing and valve seat interfaces, and precision wear components, owing to its combination of hardness, wear resistance, and dimensional stability.
Predictable Performance Under Compressive & Sliding Loads
Dimensional stability under compressive and sliding loads ensures predictable, reliable performance in shear blade disks and rotating machinery wear plates subjected to sustained mechanical stress.
Industrial Applications
AISI 420 Stainless Steel Disk is used across cutting tool, bearing, and rotating machinery sectors where edge retention and wear resistance under sustained mechanical load are required:
- ✦ Shear Blade Disks
- Used as shear blade disks, where excellent edge retention and high hardness after heat treatment deliver durable cutting performance under repeated shearing operations.
- ✦ Valve Sealing Surfaces
- Applied as valve sealing surfaces, where dimensional stability under compressive and sliding loads combined with good wear resistance ensures reliable, long-term sealing performance.
- ✦ Rotating Machinery Wear Plates
- Formed into rotating machinery wear plates, where high hardness after heat treatment and excellent edge retention provide durable performance under sustained sliding and compressive loads.
- ✦ Cutting Tool Bases & Bearing Interfaces
- Used in cutting tool bases and bearing and valve seat interfaces, where the combination of hardness, wear resistance, and dimensional stability under load delivers reliable mechanical performance.
- ✦ Tribological Performance & Heat Treatment Optimization Research
- Researched for tribological performance enhancement through plasma carburizing, plasma nitriding, and surface coating processes, and for toughness improvement through heat treatment optimization, including cryogenic post-quench treatments.
Material Properties
| Element | Value |
|---|---|
| Elongation at break( % ) | >12 |
| Modulus of elasticity( GPa ) | 200 |
| Tensile strength( MPa ) | 860 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 55 |
| Temperature coefficient( K⁻¹ ) | - |
| Element | Value |
|---|---|
| Melting point( C ) | 1450 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 460@23°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 24.9@100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 10.3@0-100°C |
| Element | Value |
|---|---|
| Density( gcm⁻³ ) | 7.8 |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Diameter | ±0.5mm |