1. Common Grades & Executive Standards

- GB: Q355B/C/D/E, Q460B/C/D/E, Q550D, Q690D

- EN: S355JR, S460NL, S500MC, S690QL

- ASTM: A572 Gr.50/60/70, A618

2. Typical Mechanical Properties

Grade Yield Strength (MPa, min) Tensile Strength (MPa) Elongation (%, min) Charpy Impact Energy (J, min)

Q355 355 470–630 21 34 (-20°C)

Q460 460 570–720 17 34 (-20°C)

Q550 550 670–830 16 27 (-20°C)

Q690 690 770–940 14 27 (-40°C)

3. Dimension Range

- Thickness: 3 mm – 120 mm

- Width: 1500 mm – 4200 mm

- Length: 2000 mm – 12000 mm

- Custom cutting and sizing are acceptable

4. Delivery Status & Surface

- Delivery condition: Hot rolled, Normalized, Quenched & Tempered

- Surface treatment: Mill scale finish, shot blasting, anti-rust painting

- Inspection: Ultrasonic testing available, complete material certification provided