SteelGalvanized steel coil (GI coil)
Galvanized steel coil (GI coil), hot-dip zinc coated, 50 to 600 g/m² (0.16 to 1.97 oz/ft²). 0.20 to 4.00 mm (0.008 to 0.157 in) thick, 600 to 1650 mm (23.62 to 64.96 in) wide, full-width or slit. Standards: EN 10346, ASTM A653/A653M. Origin: Türkiye, other qualified mills on request.
Last updated
Specifications
| Property | Value |
|---|---|
| Thickness | 0.20–4.00 mm (0.008–0.157 in) |
| Width | 600–1650 mm (23.62–64.96 in) |
| Slit coil width | 20–1500 mm (0.787–59.06 in) |
| Coil inner diameter | 508–610 mm (20.00–24.02 in) |
| Coil weight | Up to 30 t (about 66,100 lb) |
| Coating mass | 50–600 g/m² (0.16–1.97 oz/ft²) (both sides together) |
| Coating designation | Z |
| Steel grades | DX51D+Z to DX57D+Z, S220GD+Z to S550GD+Z |
| Standards | EN 10346, ASTM A653/A653M |
Uses
- Building products made by roll forming
- Household appliances
- Automotive parts
- Ducting, ventilation and general fabrication
Galvanized steel coil: what it is
Galvanized coil is steel strip with a zinc coating. In continuous hot-dip galvanizing the strip runs through a molten zinc bath on a coating line, which gives a uniform layer on both sides. The zinc protects the steel from corrosion, which is why galvanized coil is chosen for parts that meet air and moisture. The coil offered here is 0.20 to 4.00 mm (0.008 to 0.157 in) thick and 600 to 1650 mm (23.62 to 64.96 in) wide, with a coating mass from 50 to 600 g/m² (0.16 to 1.97 oz/ft²).
Coating mass explained
Coating mass is the mass of zinc per square metre, counted on both sides of the strip together and stated in g/m². The standards set the coating by this figure, and a lighter coating gives clearly less corrosion protection than a heavier one. US specifications state the coating in ounces per square foot: the ASTM A653 designation G90, for example, is 0.90 oz/ft² of zinc on both sides together. Choose the coating mass for the environment and the service life you need, and state it when you ask for a quotation.
Full-width coil and slit coil
Full-width coil is supplied in widths from 600 to 1650 mm (23.62 to 64.96 in) on an inner diameter of 508 to 610 mm (20.00 to 24.02 in). Slit coil is full-width coil cut lengthwise into narrower coils, with widths from 20 to 1500 mm (0.787 to 59.06 in), for production lines that need a fixed, narrower strip. Slit width, tolerance and the number of strips per coil are agreed at quotation, and you can request a quote for either form.
Standards, grades and the rest of the range
EN 10346 covers continuously hot-dip coated products for cold forming, including zinc coating (Z), and ASTM A653/A653M covers steel coated with zinc by the hot-dip process. Typical grades run from DX51D+Z to DX57D+Z for forming and from S220GD+Z to S550GD+Z for structural use. Cold rolled coil is the usual base: see cold rolled coil. To compare with an aluminium-zinc coating, see Aluzinc coil, and for coated and painted strip, prepainted steel coil. The whole range is on the steel coil page. Reinwent is a trading and sourcing company, and this coil is sourced from manufacturers in Türkiye.
Questions buyers ask
What is galvanized steel coil?
It is steel strip coated with zinc, wound into a coil. The zinc layer protects the steel from corrosion, and in continuous hot-dip galvanizing the strip runs through a molten zinc bath on a coating line. It is also called GI coil.
What does coating mass in g/m² mean?
Coating mass is the mass of zinc per square metre of surface, counted on both sides together. Corrosion protection depends on the coating, so a heavier coating generally lasts longer than a lighter one. The range offered is 50 to 600 g/m² (0.16 to 1.97 oz/ft²).
What does the G90 coating designation mean?
G90 is an ASTM A653 coating designation: 0.90 oz/ft² of zinc, counted on both sides together. US specifications state the coating in ounces per square foot and metric ones in grams per square metre, and one ounce per square foot equals 305 grams per square metre.
What thickness and width does galvanized coil come in?
Thickness runs from 0.20 to 4.00 mm (0.008 to 0.157 in) and width from 600 to 1650 mm (23.62 to 64.96 in). The coil inner diameter is 508 to 610 mm (20.00 to 24.02 in) and coils weigh up to 30 tonnes (about 66,100 lb). The exact limits depend on the mill, the grade and the coating mass, so they are confirmed at quotation.
Which standards apply to galvanized coil?
EN 10346 covers continuously hot-dip coated products for cold forming, and ASTM A653/A653M covers zinc-coated (galvanized) steel by the hot-dip process. Typical grades are DX51D+Z to DX57D+Z and S220GD+Z to S550GD+Z, and availability depends on the mill.
What do the grade names in EN 10346 mean?
The letters and numbers name the steel type and the coating: in DX51D+Z the +Z shows a zinc coating. DX grades are for forming, and S grades such as S250GD+Z are structural grades named by yield strength in megapascals.
What is the difference between galvanized and Aluzinc coil?
Galvanized coil is coated with zinc only, while Aluzinc coil is coated with an aluminium-zinc alloy of about 55% aluminium. The two are covered by the same EN 10346 standard under different coating letters, Z and AZ. Our Aluzinc coil page describes the other coating.
What is slit coil, and can galvanized coil be slit?
Slit coil is full-width coil cut lengthwise into narrower coils. Slit widths run from 20 to 1500 mm (0.787 to 59.06 in) within the thickness range of the coil. Slit width, tolerance and coil weight are confirmed at quotation.
What is galvanized coil used for?
Buyers use it for building products made by roll forming, household appliances, automotive parts, and ducting and general fabrication. The zinc coating is what lets the steel hold up against corrosion in service.
How do I request a quotation for galvanized coil?
Send the thickness and width in millimetres, the coating mass in g/m², the grade or standard, full-width or slit coil, the coil weight, the quantity and the destination through the quote form on this site. Reinwent sends the quotation within 12 hours at the latest.
Related products
Cold rolled steel coilCold rolled steel coil, Full Hard or annealed. 0.20 to 3.00 mm (0.008 to 0.118 in) thick, 600 to 1600 mm (23.62 to 62.99 in) wide, full-width or slit. Standard: EN 10130. Origin: Türkiye, other qualified mills on request.
Prepainted steel coil (PPGI)Prepainted steel coil (PPGI, color coated): painted galvanized strip. 0.20 to 1.50 mm (0.008 to 0.059 in) thick, 600 to 1500 mm (23.62 to 59.06 in) wide, full-width or slit. Standards: EN 10169, EN 10346. Origin: Türkiye, other qualified mills on request.
Aluzinc coil (55% Al-Zn coated)Aluzinc coil: steel strip with a hot-dip aluminium-zinc coating of about 55% aluminium, 100 to 185 g/m² (0.33 to 0.61 oz/ft²). 0.25 to 2.00 mm (0.010 to 0.079 in) thick, 600 to 1250 mm (23.62 to 49.21 in) wide. Standards: EN 10346, ASTM A792. Origin: Türkiye, other qualified mills on request.