API 5L Pipe Grades

Chemical Composition Requirements:

C: ≤0.28 (seamless) ≤0.26 (welded)

Mn: ≤1.20

P: ≤0.030

S: ≤0.030

Cu:≤0.50

Ni: ≤0.50

Cr: ≤0.50

Mo: ≤0.15

Unless otherwise agreed, V+Nb: ≤0.06

V+Nb+Ti: ≤0.15

For every 0.01% reduction in carbon content, the manganese content can be increased by 0.05%, up to 1.65%

Mechanical property requirements:

Yield strength: ≥245Mpa

Tensile strength: ≥415Mpa

Weld tensile strength of welded steel pipe: ≥415Mpa

Elongation: ≥1940* AXC0.2/4150.9 where AXC is the cross-sectional area of the tensile sample

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