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在联邦高速公路管理机构、美国钢铁研究所、以及海军实验(FHWA)的共同合作下,研制了一种高性能桥梁钢。据说,在1998年田纳西州建造的桥梁重量降低了24％,整个费用节约了6.5％。 设计的HPS-70W钢与常规钢相比,碳含量是其一半,硫含量是其十分之一,低的碳含量意味着要求低的预热,甚至不再要求预热,而且减少了建造时间和费用。据报导,HPS-700W比普通钢的强韧性都好,目前HPS-70生产工板的长度限制在约18m(60英尺)。要求特殊的低含氮量焊剂以避
A high-performance bridge steel was developed with the joint efforts of the Federal Highway Administration, the U.S. Steel Institute, and the Naval Experiment (FHWA). Allegedly, the weight of bridges built in Tennessee in 1998 was reduced by 24%, saving the entire cost by 6.5%. The designed HPS-70W steel has half the carbon content and one tenth the sulfur content of conventional steels, and the low carbon content means that low preheating is required, no preheating is even required, and the construction is reduced Time and costs. It has been reported that the toughness of HPS-700W is much better than that of ordinary steel, and the length of HPS-70 production board is currently limited to about 18m (60ft). Requires special low nitrogen flux to avoid it