Galvanized Coil

Galvanized steel coil and GI steel coil refer to the same product, which is cold rolled steel sheet coated with zinc. It is also known as galvanized iron or GI. Galvanized steel coil is produced by passing cold rolled steel sheet through a molten zinc bath.

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High-Performance Hot Dipped Galvanized Steel Coil (GI Coil)

Name: Hot Dipped Galvanized Steel Coil (GI Coil)
Brand: Ruixiang Steel
Availability: InStock
Rating: 4.8 (120 reviews)

Ruixiang Steel’s GI Steel Coils are engineered via a continuous hot-dipping process. This ensures a multi-layer protective coating of zinc-iron alloy for unmatched corrosion resistance. We provide custom solutions from Z40 to Z275 g/m² coating weights to meet global standards (ASTM A653, JIS G3302, EN10147).

Technical Specifications

Base Metal	Full Hard / Cold Rolled Base Steel
Thickness	0.12mm – 2.0mm (Precision Tolerance ±0.02mm)
Width	600mm – 1500mm (Slitting service available)
Zinc Coating	40g/m² – 275g/m² (Common: Z180, Z275)
Surface Finish	Regular Spangle, Minimum, or Zero Spangle

Galvanized steel coil manufacturer China

Factory-direct Prime GI Coils with Seaworthy Export Packing

Steel Grade & Application Guide

Category	Common Grades	Typical Use Case
Commercial Use	DX51D+Z, SGCC, CS Type A/B	Roofing sheets, general bending, ventilation ducts.
Deep Drawing	DX53D+Z, DX54D+Z, SGCD	Automotive parts, complex shaped appliance panels.
High Strength	S350GD, S550GD, G550	Structural purlins, high-load steel decking, framing.

GI Coil Technical FAQ

Q: What is the benefit of Z275 zinc coating?

A: Z275 indicates 275g/m² total zinc weight (both sides). In normal outdoor environments, this provides 20+ years of rust protection without painting. It is the gold standard for high-end construction and roofing projects.

Q: How should GI coils be stored to prevent white rust?

A: Coils should be stored in a dry, ventilated environment. We offer Chromated (passivated) and Oiled surface treatments to provide extra protection during sea transit and warehouse storage.

Galvanized Coil