BDS 9634
BDS 9634 (High alloyed steels for internal combustion engine valves. Designations and technical requirements)· BDS (Bulgaria) · 7 materials
| Designation | Material group | |
|---|---|---|
| 4 Ch 10 S 2 M | Structural and constructional steels | chevron_right |
| 4 Ch 14 N 14 W 2 M | Cast steels | chevron_right |
| 4 Ch 18 N 9 S 2 WG | Cast steels | chevron_right |
| 4 Ch 9 S 3 | Cast steels | chevron_right |
| 5 Ch 20 N 2 S 2 | Cast steels | chevron_right |
| 5 Ch 20 N 4 AG 9 | Cast steels | chevron_right |
| 8 Ch 20 N 2 S 2 | Cast steels | chevron_right |