X42 is a pipeline steel grade classified as medium-strength carbon steel. The "X" in its designation denotes pipeline steel, while "42" indicates a specified minimum yield strength of 42,000 psi (approximately 290 MPa). Also designated as L290, it conforms to the API 5L standard. X42 line pipes can be manufactured as either seamless or welded steel pipes, depending on application requirements. The production process includes hot rolling, cold forming, and welding techniques to ensure consistent mechanical properties and chemical composition.
API 5L X42 Chemical Composition
| Grade | Chemical Composition | |||||||
|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | V | Nb | Ti | |
| API 5L X42 | 0.16 | 0.45 | 1.65 | 0.020 | 0.010 | 0.07 | 0.05 | 0.04 |
API 5L X42 Mechanical Properties
| Grade | Permissible yield point ratio | Yield Strength MPa(min) | Tensile Strength MPa | Elongation % (min) |
|---|---|---|---|---|
| API 5L X42 | ≤ 0.85 | 290 | 420 - 540 | 23 |
API 5l x42 Seamless Pipe Suppliers Size Chart
API 5L X42 Line Pipe applications
X42 is widely applied in the following sectors:
Oil & Gas Industry
Used in hydrocarbon transmission pipelines, including both onshore and submarine lines, due to its balanced strength and weldability.
Chemical Processing
Employed in reactors, storage tanks, and process equipment where superior corrosion resistance is critical for handling aggressive media.
Construction & Structural Engineering
Ideal for bridges and building frameworks owing to high strength-to-weight ratio and excellent field weldability.
Shipbuilding
Specified for hull structures and marine piping systems where saltwater corrosion resistance and structural integrity are paramount.
API 5L X42 seamless and welded pipe factory
