API 5L X52
Data verifiedAPI 5L X52 is one of the highest-volume pipeline grades in service, covering a large share of the world’s gas transmission network. Its balance of strength, toughness and field weldability made it the default trunk-line grade for decades.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.24 (PSL2) |
| Si | ≤0.45 |
| Mn | ≤1.40 (PSL2) |
| P | ≤0.025 |
| S | ≤0.015 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | ≥360 MPa (52,000 psi) |
| Tensile strength | 460–760 MPa (PSL2) |
| Density | 7.85 g/cm³ |
Heat treatment
TMCP or normalized; PSL2 toughness mandatory.
Equivalent grades
| Standard | Designation |
|---|---|
| din | L360 (near) |
| aisi | API 5L X52 (PSL2) |
| gb | L360 (GB/T 9711) |
Compare side by side: API 5L X52 vs API 5L X42 · API 5L X52 vs API 5L X60
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Gas transmission pipelines, oil trunk lines, compressor-station piping.
Processing: Field-weldable with standard cellulosic/low-hydrogen practice under API 1104 procedure qualification.
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Ask for a quotationVisit NasteelSource: API 5L published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.