Q: What is the yield strength range of DX51D?
A: Yield strength Rp0.2 ≥ 140MPa, with some high-quality products reaching over 250MPa, meeting the strength requirements of general building components.
Q: What are the tensile strength and elongation parameters of DX51D?
A: Tensile strength Rm is 270-350MPa, elongation A80 ≥ 22%, possessing good plasticity and toughness, facilitating cold forming.
Q: What are the zinc plating thickness grades for DX51D?
A: Common grades include Z100-Z275, such as Z275, which indicates a total weight of ≥275g/㎡ for both sides of the zinc plating, corresponding to a thickness of approximately 39μm. Corrosion resistance increases with increasing plating thickness.
Q: How is the corrosion resistance of DX51D?
A: The zinc coating protects the substrate through sacrificial anodes, providing a corrosion protection life of 15-20 years or more in normal atmospheric environments. The Z275 grade offers an even longer lifespan in rural environments.
Q: How does the DX51D perform in high-salt-spray coastal environments?
A: Ordinary Z-grade coatings are prone to corrosion in high-salt-spray environments. It is recommended to use a zinc-aluminum-magnesium (ZAM) coating or increase the coating thickness, in conjunction with an anti-corrosion coating.