BS EN 4573:2020 pdf free.Aerospace series一Heat resisting alloy X12CrNiCoMoW21-20 - Solution treated and precipitation treated. Bars and sections- De ≤ 100 mm. BS EN 4573 1 Scope This document specifies the requirements relating to:Heat resisting alloy X12CrNiCoMoW21-20 Solution treated and precipitation treated Bars and sections De≤100mm for aerospace applications. ASD-STAN Designation: FE-PA4901.2 Normative references The following documents are referred to...