AISI 420 Stainless Steel Disk

AISI 420 Stainless Steel Disk is a martensitic stainless steel disk offering high hardness after heat treatment, good wear resistance, and moderate corrosion resistance in non-severe environments. Its high carbon and chromium content enables excellent edge retention and dimensional stability under load. In disk form, it is widely applied in cutting tool bases, bearing and valve seat interfaces, and precision wear components in mechanical systems. Specific uses include industrial shear blade disks, valve sealing surfaces, and rotating machinery wear plates. Research into AISI 420 focuses on enhancing its tribological performance via plasma carburizing, plasma nitriding, and atomic layer deposition (ALD) coatings, as well as improving toughness through cryogenic treatments. These advances aim to optimize surface hardness while maintaining or improving corrosion resistance. With its strong balance of hardness, machinability, and adaptability to surface engineering, AISI 420 disks remain a reliable choice in demanding industrial and scientific applications.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Disc

Thickness	>0.05mm	±10%
Thickness	<0.01mm	±25%
Thickness	0.01mm - 0.05mm	±15%

Material Properties for Alloys

Mechanical Properties

Element	Value
Elongation at break( % )	>12
Modulus of elasticity( GPa )	200
Tensile strength( MPa )	860

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	55
Temperature coefficient( K⁻¹ )	-

Thermal Properties

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