Brake Shoe Key To Irs Drg. No. W/Bg-6150, Alt.-2. Material And Specification Confirming To Is 3885 (Part-1) : 1992 (Re-Affirmed-2022) Read With All Amendments, Latest Amendment No. 2 Of Jul. 2024, Gr. 4 Or Is 3195 : 1992 (Re-Affirmed-2022), Read With All Amendments, Latest Amendment No. 2 Of Sept. 2000, Gr. 55 Si7, Oil Hardening Quality, Heat Treated (310-370 Bhn).