Tempering
Hollow
Steel frames
Case-hardening steels
Launching facilities (aerospace)
Link: BS EN 2221:2017 Aerospace series. Steel FE-PL31. Hardened and tempered. Hollow bars. 3,5 mm L a L 55 mm
Source: BSI Standards
Tempering
Hollow
Steel frames
Case-hardening steels
Launching facilities (aerospace)
Link: BS EN 2221:2017 Aerospace series. Steel FE-PL31. Hardened and tempered. Hollow bars. 3,5 mm L a L 55 mm
Source: BSI Standards