PREN 2769-1988 Aerospace Series Steel FE-PL53S Hardened and Tempered 1030 Less Than or Equal to Rm Less Than or Equal to 1180 MPa Forgings De Less Than or Equal to 70 mm (Issue P 1)
2010PREN 2769-2010 Aerospace series Steel FE-PL53S Hardened and tempered 1030 ≤ Rm ≤ 1180 MPa Forging De ≤ 70 mm (Edition P2)
1988PREN 2769-1988 Aerospace Series Steel FE-PL53S Hardened and Tempered 1030 Less Than or Equal to Rm Less Than or Equal to 1180 MPa Forgings De Less Than or Equal to 70 mm (Issue P 1)