| Steel designation | Chemical composition, % by mass | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Steel Name | Steel Number | C | Si max. | Mn | P max. | S | Cr | Cu | Mo | Nb | Ni | Others | |
| X4CrNiMo16-5-1 | 1.4418 | ≤ 0,06 | 0,70 | ≤ 1,50 | 0,040 | ≤ 0,030b | 15,0 to 17,0 | - | 0,80 to 1,50 | - | 4,0 to 6,0 | N: ≥ 0,020 | |
| Steel designation | Thickness t or diameter a d | Heat treatment conditionb | Hardness | 0,2 %-proof strength | Tensile Strength | Elongation after fracture | Impact energy (ISO-V) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Steel Name | Steel Number | mm | HBc max. |
Rp0,2d MPa*) min. |
R m d MPa*) |
Ad % min. |
KV J min |
||||||||
| (long.) | (tr.) | (long.) | (tr.) | ||||||||||||
| Standard grades | |||||||||||||||
| X4CrNiMo16-5-1 | 1.4418 | - | +A | 320 | - | max. 1100 | - | - | - | - | |||||
| ≤ 160 | +QT760 | - | 550 | 760 to 960 | 16 | - | 90 | - | |||||||
| 160 < t ≤ 250 | 14 | 70 | |||||||||||||
| ≤ 160 | +QT900 | - | 700 | 900 to 1100 | 16 | - | 80 | - | |||||||
| 160 < t ≤ 250 | - | 14 | - | 60 | |||||||||||
| a Width across flats for hexagons. | |||||||||||||||
| b +A = annealed, +QT = quenched and tempered. | |||||||||||||||
| c Only for guidance. | |||||||||||||||
| d For rods, only the tensile strength values apply. | |||||||||||||||
| *) 1MPa = 1 N/mm². | |||||||||||||||