Grade 420 Stainless Steel

Description

Grade 420 is a high-carbon martensitic stainless steel, offering higher strength, hardness, and wear resistance than Grade 410 due to its increased carbon content (0.15-0.30%). It contains 12.0-14.0% chromium, providing better corrosion resistance than 410, especially in mild to moderate corrosive environments. Like other martensitic grades, 420 is magnetic and can be heat-treated (quenched and tempered) to achieve excellent mechanical properties, including high hardness and toughness. It has moderate weldability, but post-weld heat treatment is necessary to maintain its corrosion resistance and reduce brittleness. 420 is widely used in applications where both wear resistance and corrosion resistance are required, such as cutting tools, medical instruments, and industrial components. Its ability to be polished to a high finish also makes it suitable for decorative and aesthetic applications.

Chemical Composition (wt%)

C: 0.15-0.30, Cr: 12.00-14.00, Mn ≤ 1.00, Si ≤ 1.00, P ≤ 0.045, S ≤ 0.030, Ni ≤ 0.75

Mechanical Properties

Tensile Strength ≥ 620 MPa, Yield Strength ≥ 450 MPa, Elongation ≥ 12%, Hardness ≤ 223 HB (annealed); Tensile Strength ≥ 1050 MPa, Yield Strength ≥ 750 MPa, Elongation ≥ 8%, Hardness ≥ 302 HB (heat-treated)

Advantages

Higher hardness and wear resistance than 410; better corrosion resistance than 410; heat-treatable for enhanced performance; magnetic; can be polished to a high finish; suitable for applications requiring both strength and corrosion resistance.

Applications

Knives, blades, surgical instruments, cutlery, mold parts, valves, pumps, gears, and components requiring high wear resistance and moderate corrosion resistance.

Equivalent Grades

AISI 420, UNS S42000, EN 1.4021, GB 20Cr13

 

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.