Given the expected increase in Arctic oil and gas exploitation, there is a demand for high-strength line pipe steels able to cope with the Arctic climate. The state-of-the-art of the tensile properties of API 5L steels at low temperatures is reviewed and discussed. Well-known characteristics such as an increase in strength and Young’s modulus with decreasing temperatures are confirmed. The Y/T ratio is fairly unaffected by changes in temperature. Lüders elongation manifests itself at low temperatures where the Lüders plateau tends to increase. Conflicting statements about the relation between ductility and temperature were found. Altogether, quantifiable test results are scarce, especially for the high strength grades from API 5L X90 grade onwards. The urgent need for more tensile strength and ductility data of these steels at low temperatures is stated and defended.
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机译：考虑到北极油气开采的预期增加，因此需要能够应对北极气候的高强度管线钢。回顾和讨论了API 5L钢在低温下的最新抗拉性能。众所周知，随着温度的降低，强度和杨氏模量会增加。 Y / T比基本上不受温度变化的影响。吕德斯伸长率在低温下表现出来，而吕德斯高原趋于升高。发现关于延性和温度之间关系的矛盾说法。总体而言，可量化的测试结果很少，特别是对于从API 5L X90等级开始的高强度等级。提出并捍卫了在低温下对这些钢的更多拉伸强度和延展性数据的迫切需求。
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