GI galvanized steel coil, galvanized sheet coil is mainly divided into two types: galvanized galvanized and non-galvanized according to the size of the zinc flowers on the appearance. It is a necessary steel for medium-sized and above building steel structures.
Galvanized steel is one of many steel varieties. It is mainly used in the construction industry, automobile, and home appliance industry. It is a steel variety in the middle and lower reaches of the steel industry. In recent years, its financial attributes have continued to increase with the influence of raw material hot-rolled coils.
Gi galvanized steel coils is produced by cold rolls in different specifications with zinc coating on the surface ,to prevent the steel surface from corrosion ,and to lengthen service time.The surface has high decoratively bright gray color and regular spangle.
GI coil product grades and Mechanical Property
| Purpose | Grades | Yield strength/Re/MPa | Tensile strength/ Rm/MPa | Elongation/A80/%(2) |
| Commercial | DC(X)51D+Z | - | 270~500 | ≥ 22 |
| Drawing | DC(X)52D+Z | 140~300 | 270~420 | ≥ 26 |
| Deep drawing | DC(X)53D+Z | 140~260 | 270~380 | ≥ 30 |
| Structure | S220GD+Z | ≥ 220 | ≥ 300 | ≥ 20 |
| S250GD+Z | ≥ 250 | ≥ 330 | ≥ 19 | |
| S280GD+Z | ≥ 280 | ≥ 360 | ≥ 18 | |
| S320GD+Z | ≥ 320 | ≥ 390 | ≥ 17 | |
| S350GD+Z | ≥ 350 | ≥ 420 | ≥ 16 | |
| S390GD+Z | ≥ 390 | 460-620 | ≥ 15 | |
| S450GD+Z | ≥ 450 | 500-700 | ≥ 14 |
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