摘要: Fastmelt工艺是由Midrex开发的,是基于生产直接还原铁的Fastmet工艺。所有的原料都被磨成粉,制成球。在转底炉将球团干燥后,球团在15分钟内被金属化成[阅读全文]
摘要:高强度低合金铌-钒结构钢 (ASTM AS72/AS72M-1997)4个级别的高强度低合金结构钢型钢、厚板、板桩和棒材。级别290和345用于桥梁、建筑和其他结构的铆接、螺栓连接或焊接结构。级别415[阅读全文]
摘要:ASTM A325 is an ASTM International standard for heavy hex structural bolts, titled Standard Specifica[阅读全文]
摘要:ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from al[阅读全文]
摘要:ASTM A500 is a standard specification published by the ASTM for cold-formed welded and seamless carbo[阅读全文]
摘要:A514 is a particular type of high strength steel, which is quenched and tempered alloy steel, with ba[阅读全文]
摘要:ASTM A992 steel is a structural steel alloy often used in the USA for steel I-beams. Like other carbo[阅读全文]
摘要:A36 steel is a standard steel alloy which is a common structural steel used in the United States.[1]T[阅读全文]
摘要:ASTM International (ASTM), originally known as the American Society for Testing and Materials, is an[阅读全文]
摘要:ASTM A53 is a carbon steel alloy, used for structural steel pipe. The alloy specifications are set by[阅读全文]