API 5L X65 steel plate specification

High-strength, weldable carbon steel plates manufactured to the API 5L X65 line-pipe specification (PSL1). These hot-rolled flat plates deliver the mechanical properties and toughness required for oil & gas pipeline fabrication, pressure-containing structures and other heavy-duty applications where high yield and reliable weldability are essential.

Key features

• Conforms to API 5L X65 (PSL1) mechanical requirements for line-pipe steel.
• High yield strength (minimum 360 MPa) with the toughness needed for low-temperature and high-stress pipeline service.
• Good weldability and suitability for large-diameter pipe fabrication and structural components.

Typical dimensional range (confirm exact lengths and availability with supplier)

• Thickness: 5 – 40 mm
• Width: 1500 – 3800 mm
• Length: from 3000 mm (length range to be confirmed with supplier)

Chemical and mechanical specification

• Chemical composition and mechanical properties meet API 5L X65 (PSL1) requirements. Composition limits cover carbon (C), manganese (Mn), phosphorus (P), sulfur (S), nickel (Ni), chromium (Cr), copper (Cu) and limits on microalloying elements (Nb, V, Ti) per the standard.
• Minimum yield strength: 360 MPa; tensile strength and full property ranges conform to API 5L X65 specification.

Applications

• Transmission and distribution line pipe (large-diameter pipelines)
• Pressure vessels and structural components in the oil & gas sector
• Any application requiring high-strength, tough, weldable flat steel plates

Quality & compliance

• Supplied to API 5L X65 (PSL1) material requirements. For commercial offers, request confirmation of mill test certificates, inspection records and available cutting/processing options.

Ordering

• Specify required thickness, width, length, surface finish and any heat-treatment or edge-processing needs when requesting an RFQ. Confirm delivery lead times, certifications and packing with the supplier.