... ,T/T mould steel round bar O1/1.2510 product Specifications:1.2510: Tool Steel, 1.2510 / O1 / SKS 3 / 9CrWMn, 1.2842 / O2, D2/1.2379, H13/1.2344, A2 ... , O1/1.2510, S7, L61.2510: 1. Tool Steel, 1.2510 / O1 / SKS 3 / 9CrWMn, 1.2842 / O2, D2/1.2379, H13/1.2344 ...