NF A 49-343
NF A 49-343 (Steel tubes. Longitudinally welded D inferior or equal to 168, 3 mm for engineering use. Dimensions. Technical delivery conditions)· AFNOR NF (France) · 4 materials
| Designation | Material group | |
|---|---|---|
| TS 18 M 5 | Structural and constructional steels | chevron_right |
| TS 18 MAD 5 | Structural and constructional steels | chevron_right |
| TS 18 MDV 5 | Structural and constructional steels | chevron_right |
| TS 37 b | Structural and constructional steels | chevron_right |