NF A 49-281
NF A 49-281 (Steel tubes, tubular accessories, bends, tee, reduction for welding made from seamless tube with quality specifications. Dimensions. Technical delivery conditions)· AFNOR NF (France) · 3 materials
| Designation | Material group | |
|---|---|---|
| A E 220 | Structural and constructional steels | chevron_right |
| A E 250 | Structural and constructional steels | chevron_right |
| A E 275 | Structural and constructional steels | chevron_right |