主要用于矿山隧道支护,特别是一些围岩变形量较大的巷道,也对矿用支护型钢的性能提出了特殊的要求。
Mainly used in mine tunnel supports, especially for some roadways with relatively large deformation of surrounding rock, and also used in structures with special requirements for the performance of the mine supporting steel.
产品牌号: 20MnVK、 Q275
Product grade: 20MnVK, Q275
实行标准: YB/T 5047-2000
实行标准: YB/T 5047-2000
9、 11、 12、 29U、 36U