This specification specifies the detailed requirements for rolled homogeneous armor plates of 28Cr2Mo (code-named GY4), 26SiMnMo (code-named GY5) and 22SiMn2TiB (code-named 616) for armored vehicles. This specification is applicable to GY4 steel plates with thicknesses of 10mm, 12mm, 15mm, 20mm, 25mm and 30mm for armored vehicles, GY5 steel plates with thicknesses of 5mm, 6mm, 8mm, 10mm, 12mm, 15mm and 20mm, and GY5 steel plates with thicknesses of 5mm, 6mm and 8mm , 10mm, 12mm, 15mm, 16mm, 18mm, 20mm and 22mm 616 steel plates.
GJB 1496B-2014 history
2014GJB 1496B-2014 Specification for 28Cr2Mo, 26SiMnMo and 22SiMn2TiB Steel Plates
2000GJB 1496A-2000 Specification for 28Cr2Mo, 26SiMnMo and 22SiMn2TiB steel plates for armor
1992GJB 1496-1992 Specification for 28Cr2Mo and 26SiMnMo steel plates for armor