Hot Dip Galvanized Steel Sheet Supplier
We supply hot dip galvanized sheet and coil from our own continuous zinc line in Wuxi: flat sheet from 0.25 mm, coil from 0.09 mm, up to 6.0 mm (4–6 mm on hot-rolled base, made to order). Base steel is cold-rolled for thin gauges and hot-rolled for heavy gauges.
Zinc from Z40 to Z275, up to Z600, checked on every order
Widths 1000, 1219, 1250 and 1500 mm (max. 1500 mm); cut to length on our own line, 1000–6000 mm
Regular, minimized or zero spangle, passivated or oiled
Galvannealed sheet available for paint and weld lines
Why Buy Hot Dipped Galvanized Sheet Metal From Us
01
Coat Weight Set by the Line, Not Guessed
Air knives control the zinc as the strip leaves the bath. We set your coat class on our own line and check coating weight on every order.
02
The Right Base for Your Gauge
Thin sheet runs on cold-rolled base for a smooth surface. Thick sheet runs on hot-rolled base to save cost. We pick the base that fits your use.
03
Adhesion You Can Bend
A good hot-dip coat bonds through a thin iron-zinc layer. Each lot passes a bend test without flaking .
04
Our Own Continuous Line
MTS is a steel group in Wuxi, Jiangsu. Our continuous hot-dip galvanizing line coats 20,000 tons a month. Every coil tag shows the coil number, size and coat.
05
8–12 Working Days Lead Time
Typical lead time is 8–12 working days, and shorter for sizes in stock. Galvanneal lead time 3–7 working days for stock items; 15–25 working days if out of stock.
How Continuous Hot-Dip Galvanizing Protects Your Steel
On a continuous line, steel strip is cleaned and annealed in a furnace. It then runs through molten zinc at about 460 °C. As it leaves the bath, air knives wipe off the extra zinc. The strip cools, and the zinc sets as a bright, even coat.
The result bonds to the steel itself, not just sits on top. It bends with the sheet in roll forming and folding. It also carries far more zinc than electroplating. That is why hot dip galvanized steel sheet is the standard for anything facing weather.
Hot-Dip Sheet Range
Cold-Rolled Base HDG Sheet
Smooth surface for roofing, ducting, appliance and painted parts. Flat sheet from 0.25 mm, coil from 0.09 mm.
Hot Rolled Galvanized Steel
Pickled hot-rolled base, then galvanized. Lower cost for structural and heavier parts, up to 6.0 mm on our line.
HDG Steel Plate
Heavy gauges for brackets and structures. Thicker plate dipped after cutting is in our Galvanized Steel Plate range.
Pre Galvanized Sheet
Sheet coated before it is cut, bent or welded into parts. In practice this is continuous hot-dip sheet. See the article below.
Galvannealed Steel Sheet (A60)
Hot-dip sheet heated after coating to form a zinc-iron alloy. Matte grey, paints and welds well.
Specifications
| Item | Range |
|---|---|
| Process | Continuous hot-dip galvanizing |
| Base | Cold-rolled (CRGI) |
| Thickness | Sheet 0.25–3.0 mm, coil 0.09–3.0 mm; 4.0–6.0 mm on hot-rolled base, made to order |
| Width | 1000, 1219, 1250, 1500 mm (max. 1500 mm) |
| Coating | Z40–Z275 g/m² (G30–G90), up to Z600; galvannealed also supplied |
| Grades | DX51D, DX52D, DX53D, DX54D +Z; S250GD–S550GD +Z; SGCC; ASTM A653 CS Type B |
| Standards | EN 10346, ASTM A653, JIS G3302, GB/T 2518-2019, AS 1397 |
| Spangle | Regular, minimized, zero |
| Treatment | Chromated, chrome-free, oiled, anti-fingerprint |
| Form | Coil, slit coil from 15 mm, recoiled coil 4–5 t or 8–10 t (up to 12 t), sheet cut to 2000–6000 mm |
| Line capacity | 20,000 tons a month |
Hot-Dip, Pre-Galvanized, Galvannealed: Clearing Up the Names
Galvanized sheet comes with many labels. Some describe the same product. Others describe something quite different. Knowing which is which saves you a wrong shipment.
Continuous Hot-Dip vs Batch Hot-Dip
Both use molten zinc. The difference is when the zinc goes on.
Continuous hot-dip coats the strip before you make anything from it. The coat is thin and even, from about 4 to 20 µm per side. This is what most buyers mean by hot dip galvanized sheet.
Batch hot-dip coats finished parts after cutting and welding. The coat is much thicker, often 50 to 100 µm or more. It is used for structures, plate and fabricated parts.
If you ask for “hot dip galvanized” on a thin sheet, you get continuous coating. If your spec means batch dipping after fabrication, say so clearly.
What Pre Galvanized Sheet Means
Pre galvanised steel sheet is coated before it is formed into a product. “Pre galv sheet” is the same thing. In practice it is continuous hot-dip sheet, viewed from the fabricator’s side. The term is common in pipe, tube and duct making.
The word “pre” matters for edges. Cut edges and punched holes are bare steel. On thin sheet, the nearby zinc protects them. On thick sheet in harsh outdoor air, it may not. For those parts, batch dipping after fabrication is safer.
Cold-Rolled Base vs Hot-Rolled Base
Cold-rolled base gives a smooth, tight-gauge sheet. It is the norm up to about 2 mm. Hot-rolled base is pickled, then galvanized. It costs less per ton at heavier gauges. Its surface is rougher, so it suits structural parts over show surfaces.
Galvannealed Sheet: A Different Product
Galvanneal sheet metal starts as hot-dip sheet. Right after the bath, it is heated again. The zinc and iron mix into an alloy coat. The surface turns matte grey with no spangle.
This alloy coat takes paint very well and welds more cleanly than pure zinc. That is why car bodies and appliance shells often use it. The trade-off is corrosion: it has less pure zinc, so bare outdoor life is shorter.
Galvannealed coats are named A40 or A60 under ASTM A653, or ZF under EN 10346. An “ASTM A653 A60” order means 0.60 oz/ft² of alloy coat, both sides. Order galvanneal only if you will paint the part or weld it in volume.
Choosing Your Coat
For coastal or humid sites, go to Z180 or above, up to Z275. For indoor framing, Z60 to Z80 is usually enough, and Z80 to Z120 for ducts and cabinets. For painted panels, zero spangle at Z80 to Z140 is common. For heavy welding and painting, consider galvannealed.
Frequently Asked Questions
Is hot dip galvanized sheet better than electro galvanized?
For outdoor use, yes. Hot-dip gives a much thicker zinc coat. Electro galvanized sheet has a thinner, smoother coat that suits painted indoor parts. Choose by where the part lives and how it is finished.
What is HDG sheet?
HDG means hot-dip galvanized. HDG sheet is steel sheet coated in molten zinc on a continuous line. It is the most common galvanized sheet for building, ducts and outdoor parts.
Is pre galvanized the same as hot dip galvanized?
Pre-galvanized sheet is made by continuous hot-dipping, so the coat is the same type. The difference is with batch hot-dip galvanizing, where parts are dipped after fabrication. Batch-dipped parts get a thicker coat that also covers edges.
What is A60 galvanneal?
A60 is an ASTM A653 coating class for galvannealed steel. It means 0.60 oz/ft² of zinc-iron alloy coat, both sides combined. It is popular for parts that will be painted or spot welded.
Are you galvannealed steel sheet suppliers?
Yes, we supply galvannealed sheet. It runs on fewer lines than standard hot-dip, so lead times are longer. Send your grade and coat to check availability.
What affects galvanneal sheet price?
Galvanneal costs more than standard hot-dip sheet of the same coat. It needs an extra heating step and fewer mills make it. Thickness, coat class and quantity also matter. Send your list, and we will quote.
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