420 Stainless Steel
Introduction
420 is a martensitic stainless steel, characterised by a high hardness and high carbon content which provides both outstanding corrosion resistance and exceptional wear resistance.
420 stainless steel is a higher carbon version of 410; and like most non-stainless steels it can be hardened by heat treatment.
We supply 420 stainless steel sheet and 420 stainless steel coil.
Properties
It contains a minimum of 12 per cent chromium, just sufficient to give corrosion resistance properties. It has good ductility in the annealed condition but is capable of being hardened up to Rockwell Hardness 52HRC, the highest hardness of the 12 per cent chromium grades.
Its best corrosion resistance is achieved when the metal is hardened and surface ground or polished.
Typical applications include fine cutlery, machine knives, surgical instruments, wear plates, cutting tools and knives and blades for the food processing industries.
Specifications
Grade specifications for 420 grade stainless steel
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
420 | S42000 | 420S37 | 56C | 1.4021 | X20Cr13 | 2303 | SUS 420J1 |
| These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted. | |||||||
Composition
Grade 420S37 (1.4021)
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Grade 420S45
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Our stock
We stock 420 in a range of thicknesses from 0.10mm to 3.00mm thick, in sheet and in coil. Our stock is hardened and tempered, suitable for manufacturing flat springs and blades. We can also offer a cutting or profiling service.
The material we stock is usually hardened in the range of 48/52HRC.
420 hardened and tempered stainless | |||
| 360 | 0.50 | 1250 | 1.75 |
| 360 | 0.80 | 1250 | 2.80 |
| 360 | 1.00 | 1250 | 3.53 |
| 360 | 1.20 | 1250 | 4.25 |
| 380 | 1.50 | 2500 | 11.20 |
| 360 | 1.60 | 1250 | 5.65 |
| 380 | 1.80 | 2500 | 13.68 |
| 500 | 1.80 | 2500 | 17.60 |
| 360 | 2.00 | 1250 | 7.10 |
| 360 | 2.50 | 1250 | 8.85 |
| 360 | 3.00 | 1250 | 10.60 |
Most of the above sizes are available for next day delivery
We hold some stock in 420 annealed from 1.5 mm to 6.5mm thickness
Alternatively we stock 301 grade strip which is an austenitic grade. 301 is suitable for forming springs without the need for subsequent hardening.
If you need advice on which grade to use, call our expert advice line on 0114 244 0527 to speak to a member of our friendly team. Alternatively you can email bss@steelstrip.co.uk.
