
Available Shapes






420 Stainless Steel
Alloy 420 / SS420 / 1.4021 is a hardenable, martensitic stainless steel that is a modification of Alloy 410. Similar to 410, it contains a minimum of 12% chromium, just sufficient enough to give corrosion resistant properties. Alloy 420 has higher carbon content than Alloy 410 which is designed to optimize strength and hardness characteristics. It has good ductility it the annealed condition but is capable of being hardened to a minimum Rockwell hardness of 50 HRC, the highest hardness of the 12% chromium grades. Due to its hardening properties, Alloy 420 is not often welded, although it is possible. Martensitic stainless steels are designed for high hardness and sometimes other properties are to some degree compromised. Corrosion resistance is lower than the common austenitic grades and their useful operating range is limited by their loss of ductility at sub-zero temperatures and loss of strength by over-tempering at elevated temperatures. Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.
Related Specifications
1.4021 1.4028 1.4034 1.2083 ASTM A276 S42000
BS EN 10088 AISI BS970 UNS X20Cr13 X30Cr13
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Flame cut profiles. can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision
ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.
Flame cut profiles. can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.
Flame cut profiles. can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.
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Flame cut profiles. can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision
ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.
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Flame cut profiles. can be supplied to your specific requirements. After flame cutting, steel blanks can be normalised or stress relieved to reduce any hardness on the flame cut edges. Steel profiles can be lumsden ground or precision
ground to size on thickness. Flame cut plates can be supplied in a wide variety of carbon steel specifications.
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