AISI 420 Stainless Steel Coil

AISI 420 Stainless Steel Coil is a martensitic stainless steel coil known for its high hardness after heat treatment, moderate corrosion resistance, and excellent wear resistance. The alloy’s high carbon and chromium content enables it to achieve exceptional strength and edge retention, making it suitable for applications where durability is paramount. In coil form, it is widely used in cutting tools manufacturing, industrial blades production, and surgical instrument fabrication. Specific applications include knife blade strips, shear blade stock, and precision-formed coil springs for mechanical systems. In research, AISI 420 is studied for optimization of machining parameters, the effects of quenching and tempering on corrosion rate, and advanced wire electrical discharge machining (WEDM) for complex geometries. Its combination of high mechanical performance, process adaptability, and wear resistance ensures it remains a core material for precision engineering and high-demand industrial environments.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Coil

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

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