BS EN 4570:2020 pdf free.Aerospace series - Heat resisting alloy X12CrNiCoMoW21 -20 - Solution treated- Forgings- De ≤100 mm. BS EN 4570 1 Scope This document specifies the requirements relating to: Heat resisting alloy X12CrNiCoMoW21-20 Solution treated Forgings De≤100mm for aerospace applications. ASD-STAN Designation: FE-PA4901.2 Normative references The following documents are referred to in the text in such a way...