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API 5L B grade pipeline steel, low carbon structural steel, is the basic grade of pipeline steel.
X42 grade microalloyed pipeline steel has a yield strength of ≥290 MPa.
X52 grade pipeline steel is the most commonly used steel grade for oil and gas pipelines worldwide.
X56 grade high-strength pipeline steel, with a yield strength ≥386 MPa, is between X52 and X60.
X60 grade high-strength pipeline steel, with a yield strength ≥415 MPa.
X65 grade high-strength pipeline steel, with a yield strength ≥450 MPa.
X70 grade ultra-high strength pipeline steel, with a yield strength ≥485 MPa.
X80 grade ultra-high strength pipeline steel has a yield strength of ≥555 MPa.
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