What is DX51D+Z80 coil?

What is DX51D+Z80 coil?
DX51D+Z80 is a hot-dip galvanized coil, where "DX51D" indicates the steel grade, and "Z80" means the zinc coating weighs 80 grams per square meter.
What does DX51D mean?
In DX51D, "D" stands for coated steel, "X" stands for zinc, and "51" represents the steel grade serial number. 51D designates general structural steel.
What does an 80-gram zinc coating weight mean?
A zinc coating weight of 80 grams means the zinc coating weighs 80 grams per square meter of the steel surface. This zinc coating provides corrosion protection, and an 80-gram zinc coating is moderately thick, meeting corrosion protection requirements in general environments to a certain extent.
What are the main chemical components of DX51D+Z80 coil?
The main chemical composition includes carbon (C) ≤ 0.07%, silicon (Si) ≤ 0.03%, manganese (Mn) ≤ 0.50%, phosphorus (P) ≤ 0.025%, sulfur (S) ≤ 0.025%, and aluminum (Alt) ≥ 0.020%.
How does carbon content affect the properties of DX51D+Z80 coils?
Excessively high carbon content reduces the steel's plasticity and toughness, while increasing its hardness and strength, potentially impairing its processing properties in stamping and bending.