DS EN 4216:2007 Aerospace Series - Steel Fe-Cm3801 (Gx5crnicunb16-4) - Homogenized, Solution Treated And Precipitation Hardened, Investment Casting D[E] <= 50 Mm, R[M] >= 900 Mpa Defines the requirements relating to: Steel FE-CM3801 (GX5CrNiCuNb16-4) - Homogenized, solution treated and precipitation hardened, investment casting D[e] <= 50 mm, R[m] >= 900 MPa for aerospace appl