NBR NM 181
NBR NM 181 (Seamless carbon steel circular tubes subject to special requirements)· NBR (Brazil) · 3 materials
| Designation | Material group | |
|---|---|---|
| St 37.0 | Structural and constructional steels | chevron_right |
| St 44.0 | Structural and constructional steels | chevron_right |
| St 52.0 | Structural and constructional steels | chevron_right |