420 Stainless Steel
(UNS S42000 | EN 1.4021 / 1.4034) | AMS 5621 & AMS 5622
Overview:
The iconic knife steel — high carbon, high chromium, and capable of hardening to a fine edge. Offers excellent polishability and moderate corrosion resistance.
Industries:
Cutlery, surgical instruments, dies, gauges, and precision tooling.
Applications: Pump shafts, General bar stock, Knives, Surgical tools, Hardened wear parts, Economy / Higher Ductility
Available Forms: Coil, strip, sheet, plate, foil, and bar.
Standards: ASTM A240/A276; AMS 5506; ASTM F899
420 stainless steel from Source21 is a high carbon martensitic stainless steel grade recognized for its ability to achieve high hardness excellent edge retention and a refined polished finish. Often known as classic knife steel Type 420 stainless steel combines high chromium content with heat treatable strength offering moderate corrosion resistance alongside superior wear performance. It is widely used in cutlery surgical instruments dies gauges and precision tooling where sharpness durability and surface finish are essential. Source21 supplies 420 stainless steel in coil, strip, sheet, foil, and bar, all manufactured to meet ASTM A240, ASTM A276, AMS 5506, and ASTM F899 standards. Contact the Source21 team to place an order discuss material availability or receive expert guidance for precision and cutting applications backed by reliable supply and responsive service.