A Galvalume Sheet from this line is flat steel sealed under an aluminum-zinc layer, not a painted or polymer-treated product. The alloy is part of the material. It solidifies onto the strip at 600℃ and behaves as one piece with the base metal, bending and rolling without peeling. That single fact explains most of what follows: the protection lives inside the layer itself, not in anything applied after production.

The coating chemistry.

The alloy composition is fixed: 55% aluminum, 43.4% zinc and 1.6% silicon, and each element has a job. Aluminum forms the barrier that keeps oxygen and moisture away from the steel. Zinc corrodes in preference to the base metal, so a scratch, a cut edge or a drilled hole stays protected even after the coating has been breached. Silicon is not filler: it checks the brittle alloy-steel reaction during solidification, which is why the finished coating bends instead of flaking, and it spreads the layer evenly, so the coating neither pools into thick patches nor wears thin. Out of this chemistry come repeatable numbers: corrosion resistance roughly three times that of pure galvanized sheet, coating performance two to six times better than hot dip galvanized steel in open air, a normal service life of about 25 years, and heat tolerance up to 315℃. The same alloy travels under two trade names, Galvalume in some catalogs and Aluzinc in others, and Aluzinc Sheet Suppliers quote the identical material under whichever label the local market uses.

How it behaves in the workshop.

Galvalume Sheet Metal punches, cuts, welds and roll-forms without special tooling, because the coating stays flexible under bending. The layer grips paint film well when a colored topcoat is required, and surface conductivity stays high, which matters for welding and earthing details. The paint-friendly face also widens design freedom. The finished surface is smooth, flat and silvery white, with zinc flowers even enough for exterior wall panels, and buyers choose between regular, small and big spangle so the look follows the project. Fabricators treat the sheet like ordinary steel, which is exactly what a coated flat product is supposed to feel like.

Specifications and grades.

Thickness runs from 0.16 mm to 2.5 mm, width is customized, and length follows the customer’s requirement. Grades cover G550, DX51d and related types, produced to the buyer’s request, against standards spanning AISI, ASTM, BS, DIN, GB and JIS, with JIS3321 and ASTM A792M as common reference points. The steel type tables line the equivalents across systems: G2+AZ and G3+AZ for cold forming and deep drawing match DX51D+AZ and DX52D+AZ, while structural grades from G250+AZ up to G550+AZ correspond to S250GD+AZ through S550GD+AZ under references such as AS1397, EN10215, JISG3312 and ISO9354. A product made to those standards behaves predictably across markets, so a buyer working to a local specification can order the same material without translation work. From thin forming gauges to heavier Galvalume Steel Plate, the alloy chemistry stays the same; only the section changes.

Surface treatment options.

Before the sheet leaves the line, ZZ Group offers five surface treatments, and the choice changes how the product arrives. Chemical treatment minimizes the dark gray humid-storage staining that forms when moisture sits between wraps, and keeps the bright metallic luster longer. Oil reduces the same risk while adding lubricity for stamping and roll forming. Chemical treatment plus oil covers both at once. Dry suits short, carefully controlled logistics, and it must be transported and stored with extra care to preserve low-humidity conditions. Anti-finger print keeps handling marks off panels that will be seen up close. Each option is applied at the line, and export buyers treat the decision as routine conversation because the right choice depends on the destination climate and the voyage length.

Where the product is used.

Around a building, Galvalume Sheets For Roofing face years of sun, salt fog and rain, and the same material forms walls, garages, soundproof walls, pipes and modular houses. Inside a vehicle it becomes mufflers, exhaust pipes, wiper accessories, fuel tanks and truck boxes, all of them hot, wet or both. In the household it shows up as refrigerator backboards, gas stove parts, air-conditioner cabinets, microwave housings, LCD frames, LED backlights and electrical cabinets. Farms take it for pig houses, chicken houses, granaries and greenhouse pipes, where the atmosphere is tougher than an ordinary wall sees. Heat insulation covers, heat exchangers, dryers and water heaters round out the list. Because the coating fights corrosion and heat at once, one coil feeds roll forming and stamping lines alike.

Quality and supply from ZZ Group.

Quality is carried by the whole chain, and the product record is what separates one source from the next. Galvalume Sheet Suppliers quote similar thickness ranges on paper; the delivered coil shows the difference, starting with compliance with the standards named in the order and paperwork that matches the coating that actually arrived. An Aluzinc Sheet Price Per Kg comparison across suppliers says little until grade, gauge and surface treatment line up. ZZ Group is built to answer that test. Founded in the early 1980s and headquartered in Shanghai’s Yangpu District, the group holds registered capital of 200 million RMB, runs more than 20 subsidiary companies and storage sites, operates six factories, employs over 1,500 people, sells more than 4.5 million tons of steel products a year and reports annual sales income above 2.7 billion USD. It acts as agent for mills including Baosteel, Anshan Steel, Shougang, Benxi Steel, Hebei Iron and Steel, Jiuquan Iron and Steel and Liuzhou Iron and Steel, and runs steel processing and distribution centers in Shanghai and Quanzhou. Its customer list includes Gree, Midea, Geely, Volkswagen and XCMG. For overseas buyers ZZ Group sells finished Galvalume Sheet Metal For Sale directly, can act for import customs clearance, and understands the Philippine market from long service there. Its standing includes the national steel trade and logistics “hundred good faith enterprise” title and a place among Shanghai’s top 100 private enterprises, with integrity, practicality, innovation and win-win as the operating principle.

Summary: AZ150 Galvalume Steel Sheet is a steel sheet bonded at 600℃ to an alloy of 55% aluminum, 43.4% zinc and 1.6% silicon, delivering about 25 years of normal service, tolerance to 315℃ heat, corrosion resistance near three times that of pure galvanized sheet, and formability, weldability and paintability like ordinary steel.