AECMA PREN 4642-2007
Aerospace series Steel FE-PM 3504 (X4CrNiMo16-5-1) Air melted Hardened and tempered Sheet and plate 0,6 mm less than or eqaul to a less than or equal to 50 mm 900 MPa less than or equal to Rm less than or equal to 1 050 MPa Edition P 1