1. Material Standards & Grades

Primary Standards:

• ASTM A568 - Steel, Sheet, Carbon, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled

• JIS G3131 - Hot-rolled mild steel plates, sheets and strip

• GB/T 3273 - Hot-rolled carbon steel sheets and strips

• EN 10025-2 - Hot-rolled products of structural steels

Common Commercial Grades:

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Physical Properties

5. Product Specifications

6. Manufacturing Process

Production Steps:

• Slab reheating (1150-1250°C)

• Roughing mill

• Finishing mill

• Laminar cooling

• Coiling (550-650°C)

• Inspection and packaging

Key Process Parameters:

• Finishing temperature: 850-920°C

• Coiling temperature: 550-650°C

• Cooling rate: 10-25°C/s

7. Surface Finish Options

8. Testing & Inspection

Standard Tests:

• Tensile test

• Bend test

• Hardness test

• Chemical analysis

• Surface inspection

• Dimensional inspection

Optional Tests:

• Impact test

• Flattening test

• Microstructure examination

• Non-destructive testing

• Third-party inspection

9. Applications

Primary Applications:

• Automotive: Chassis components, structural parts

• Construction: Structural sections, building frames

• Pipe & Tube: Welded pipe manufacturing

• Industrial: Machinery frames, equipment bases

• Storage: Storage tanks, silos

• General Fabrication: Various metal products

Secondary Processing:

• Cold rolling base material

• Galvanizing substrate

• Pipe and tube making

• Stamping and forming

• Welding and fabrication

All hot-rolled carbon steel coils are manufactured according to international standards and can be customized to meet specific customer requirements and application needs.