API 5L X60 pipeline steel

API American Petroleum Institute standard, X stands for pipe, that is, X60 pipeline steel, which requires a minimum yield strength of about 415MPa or more.

Overview of X60 line pipe:
standard:
API SPEC 5L - American Petroleum Institute Standard
GB/T9711 - Chinese National Standard

API SPEC 5L - Mechanical Properties:

standard	Grade	tensile strength（MPa）	Yield Strength（MPa）	yield strength ratio	Elongation（%）	0℃ Impact energy Akv（J）
API SPEC 5L GB/T9711.2	B	≥415	245～440	≤0.80	22	≥40
X42		≥415	290～440	≤0.80	21	≥40
X52		≥460	360～510	≤0.85	20	≥40
X60		≥520	415～565	≤0.85	18	≥40
X65		≥535	450～570	≤0.90	18	≥40
X70		≥570	485～605	≤0.90	18	≥40

X60 line pipe is used for oxygen, water and oil delivery pipes in the oil and gas industry.

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