Galvanized coils are widely used in various industries, including construction, automotive, and electronics. However, the quality of galvanized coils can vary greatly depending on the manufacturing process and materials used. Therefore, it is essential to understand the standards that govern the production of galvanized coils.
China galvanized steel in coil
China is one of the largest producers of galvanized steel in coil, and its products are used in various applications worldwide.
The Chinese standard for galvanized steel in the coil is GB/T 12753-2008, which specifies the requirements for the surface quality, mechanical properties, and dimensional accuracy of galvanized steel coils.
Surface quality requirements
The surface quality of galvanized steel in the coil is critical, as it directly affects the durability and corrosion resistance of the final product.
The Chinese standard GB/T 12753-2008 specifies the following surface quality requirements for galvanized steel coils:
- The coating should be uniform and free from defects, such as pinholes, blisters, and scratches.
- The coating should have a minimum thickness of 10 microns.
- The coating should be free from cracks and fissures.
- The coating should have a smooth and even texture.
Mechanical properties requirements
In addition to surface quality, the mechanical properties of galvanized steel in the coil are also important. The Chinese standard GB/T 12753-2008 specifies the following mechanical properties requirements for galvanized steel coils:
- The yield strength should be at least 245 MPa.
- The tensile strength should be at least 450 MPa.
- The elongation at break should be at least 15%.
- The hardness should be within the range of 120-180 HRB.
Dimensional accuracy requirements
The dimensional accuracy of galvanized steel in the coil is also important, as it affects the performance and durability of the final product.
The Chinese standard GB/T 12753-2008 specifies the following dimensional accuracy requirements for galvanized steel coils:
- The width should be within the range of 600-1250 mm.
- The thickness should be within the range of 0.3-1.5 mm.
- The length should be within the range of 3000-6000 mm.
- The tolerance for width and thickness should be ±1%.
Conclusion
In conclusion, the standard for galvanized coils in China is governed by the GB/T 12753-2008 standard, which specifies the requirements for surface quality, mechanical properties, and dimensional accuracy.
By understanding these standards, manufacturers can ensure that their products meet the required specifications and provide the best possible performance and durability.
In addition to the GB/T 12753-2008 standard, other international standards govern the production of galvanized coils, such as ASTM A653/A653M and EN 10346.
By understanding these standards, manufacturers can ensure that their products meet the required specifications for various applications and industries.
Overall, the standard for galvanized coils is essential for ensuring the quality and durability of the final product.
By following these standards, manufacturers can provide high-quality products that meet the needs of their customers and comply with industry regulations.