BS 5S 21
BS 5S 21 (Specification for aircraft material “20” Carbon steel (Suitable for welding) - (25/35 tonf/sq in: maximum size 6 inches diameter or minor sectional dimension))· B.S. (United Kingdom) · 1 materials
| Designation | Material group | |
|---|---|---|
| S 21 | Structural and constructional steels | chevron_right |