NF A 49-312
NF A 49-312 (Steel tubes. Seamless steel tubes with improved machinability for mechanical machined parts)· AFNOR NF (France) · 3 materials
| Designation | Material group | |
|---|---|---|
| S 450 MG2 | Structural and constructional steels | chevron_right |
| S 470 M | Structural and constructional steels | chevron_right |
| S 650 MG2 | Structural and constructional steels | chevron_right |