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)
Specification for aircraft material. '20' carbon steel (suitable for welding) (25/35 tonf/sq in: maximum size 6 inches diameter or minor sectional dimension)
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Document Number
BS-5S-21
Revision Level
PD 6309
Status
Superseded
Publication Date
Jan. 1, 1968