1. Main Grades & Standards

- API Spec 5L: Gr.B/L245, X42/L290, X46/L320, X52/L360, X56/L390, X60/L415, X65/L450, X70/L485, X80/L555, X90/L625, X100/L690 (PSL1/PSL2)

- GB/T 21237: L245, L290, L360, L415, L450, L485, L555

2. Typical Mechanical Properties (PSL2, ≥)

- Gr.B/L245: Yield ≥245MPa; Tensile 415–540MPa; Elongation ≥21%; Impact ≥27J at 0°C

- X52/L360: Yield ≥360MPa; Tensile 460–760MPa; Elongation ≥20%; Impact ≥34J at -20°C

- X70/L485: Yield ≥485MPa; Tensile 570–760MPa; Elongation ≥18%; Impact ≥40J at -40°C

- X80/L555: Yield ≥555MPa; Tensile 625–825MPa; Elongation ≥17%; Impact ≥40J at -40°C

3. Chemical Composition (Max, wt%)

C≤0.22; Si≤0.45; Mn≤1.60; P≤0.025; S≤0.015; Nb≤0.05; V≤0.08; Ti≤0.06; Cr≤0.30; Mo≤0.25; Cu≤0.30 . Low carbon equivalent (CE≤0.43) ensures good weldability.

4. Size Range

- Thickness: 6mm–100mm

- Width: 1500mm–4200mm

- Length: 3000mm–18000mm

- Custom lengths & widths available

5. Delivery Condition & Quality

- Delivery: TMCP, Normalized, Quenched & Tempered

- Surface: Mill finish, shot blasted, anti‑rust primed

- Testing: 100% UT, Charpy impact, hardness, tensile, chemical analysis

- Certificates: EN 10204 3.1/3.2, full mill test report, traceability