420 F MOD, 1.4197, X 20 CrNiMoS 13-1 free cutting martensitic hardenable stainless steel, Hardenable alloyed free cutting stainless steel for high precision parts, with a better corrosion resistance than AISI 420 F, 1.4034+S DIN 1.4197 or X20CrNiMoS13-1, 1.4197 is categorized as stainless, temperable, martensitic chromium steel. It has a large chromium share that amounts to about 13% and the approximately 0.2% sulphur allows it to be easily machined. The molybdenum and nickel meanwhile, give the material a high resistance to corrosion. Primary uses are in the medical sector, where 1.4197 is used in the production of needles, scissors, mills, drill bits, screws and even blades. Resistance to corrosion Once hardened and tempered, the approx. 13% chromium gives good protection from corrosion. With high surface quality the resistance can be increased even more.
X20CrNiMoS13-1, 1.4197, 420 F MOD martensitic stainless steel Hardenable alloyed free cutting stainless steel for high precision parts.
| Grade | Chemical Component WT % | |||||||
|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Ni | Mo | |
| X20CrNiMoS13-1, 1.4197 | 0.20-0.30 | Max 1.00 | Max 2.00 | Max 0.04 | 0.15-0.27 | 12.5-14.00 | 0.75-1.50 | 1.10-1.50 |
| 420 F MOD | 0.20-0.30 | Max 1.00 | Max 2.00 | Max 0.04 | 0.15-0.27 | 12.5-14.00 | 0.75-1.50 | 1.10-1.50 |
Tensile strength Rm: 855 – 862 N/mm²
Yield strength Rp 0,2: 676 – 683 N/mm²
Elongation A100mm: 8-11 %
Hardening, 1.4197 is solution heat treated between 1000°C and 1100°C, and then quenched in oil. Annealing temperatures lie between 400°C and 600°C, after which the material is cooled in air.
As with all temperable chrome steels, welding should be avoided.
Good processing performance
420F, 1.4197, X 20 CrNiMoS 13-1
Steel grade
Special steel