ASTM A354 Standard Specification for Quenched and Tempered Alloy Steel Bolts,Studs,and Other Externally Threaded Fasteners淬火和回火合金钢螺栓、柱头螺栓与其它外螺纹紧固件的规格这是一份美国标准,不是材质具体牌号,材质只能说是合金钢。