SAE4100系列的多种高强度低合金钢,由于有极好的屈服强度,故在生产油气井用的无缝套管和油管中获得广泛应用。近年来,由于油气井深度的增加,应用这些低合金钢管件曾出现了硫化物应力开裂问题,这是由于在深井中存在的可观数量的硫化氢与提高了的管件的拉伸应力联合作用的结果。 The wide range of high-strength low-alloy steels of the SAE4100 series are used in the production of seamless casing and tubing for oil and gas wells because of their excellent yield strength. In recent years, problems with sulfide stress cracking have been encountered with the use of these low alloy steel pipe fittings due to the increased depth of the well, due to the combined effect of the considerable amount of hydrogen sulphide present in the deep well and the increased tensile stress of the pipe result.