Aerospace series - Steel FE-PL31 - Hardened and tempered - Hollow bars - 3,5 mm <kleiner => a <kleiner => 55 mm; German and English version EN 2221:2017— 18 стр.
Aerospace series - Steel and heat resisting alloys - Wrought products - Technical specification - Part 002: Bar and section; German and English version EN 4700-002:2016— 69 стр.
Aerospace series - Metallic materials - Rules for drafting and presentation of material standards - Part 005: Specific rules for steels; German and English version EN 4500-005:2012— 42 стр.
Aerospace series - Steel FE-PL31 - Hardened and tempered - Hollow bars - 3,5 mm <kleiner => a <kleiner => 55 mm; German and English version FprEN 2221:2017
