Case-hardening steels have a relatively low carbon content mostly ranging between 0.10 and 0.30%.
Case-hardening steel is used in automotive engineering as well as in mechanical and plant engineering for parts such as cardan shafts, coupling parts, gears and bolts.
| Material No. | DIN NORM | SAE AISI | CHEMICAL COMPOSITION ( % ) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si max. | Mn | P max. | S max. | Cr | Mo | Ni | |||
| 1,6523 | 21NiCrMo2 | 8620 | 0,17 – 0,23 | 0,40 | 0,65 – 0,95 | 0,025 | 0,035 | 0,35 – 0,70 | 0,15 – 0,25 | 0,40 – 0,70 |
| 1,7131 | 16MnCr5 | 5115 | 0,14 – 0,19 | 0,40 | 1,00 – 1,30 | 0,025 | 0,035 | 0,80 – 1,10 | – | – |
| 1,7147 | 20MnCr5 | 5120 | 0,17 – 0,22 | 0,40 | 1,10 – 1,40 | 0,025 | 0,035 | 1,00 – 1,30 | – | – |
