55% aluminum-zinc alloy-coated steel coil for roofing, wall cladding, roll forming and prepainted steel production. Specify the substrate grade, coating mass, gauge, width and coil weight for a precise bulk quotation.
Send the required ASTM, EN, GB, JIS or AS standard; steel grade; thickness basis; coating class; finish; dimensions; tonnage and delivery destination. We will review the supply arrangement and quotation details.
Check AZ coating classes ↓Select full-width coil for profiling or narrower slit coil for roll forming. The nominal coating composition is approximately 55% aluminum, 1.6% silicon and the balance zinc by mass.
Aluminum-zinc coated flat steel supplied in coil form. Used as input for corrugated roofing, wall cladding, panel production and other roll-formed components. Check the forming grade, bend requirement, coating mass and surface treatment together.
View procurement specifications ↗Slit strip can be arranged for narrower production lines or component widths. Specify the finished slit width, edge burr tolerance, coil ID, winding direction and protection requirements in addition to the base metal specification.
Estimate coil length ↗Bare 55% Al-Zn coated coil may be used as a substrate for prepainted Galvalume (PPGL). When you need a factory-applied paint system, specify primer, topcoat, backcoat, color and coating performance under the relevant prepainted-sheet standard.
A complete coil inquiry identifies both the substrate and the metallic coating. Request tolerances, surface treatment and coil packing under one consistent order standard.
| Product form | Full-width coil, slit coil, cut-to-length upon inquiry |
| Metallic coating | 55% Al-Zn-Si alloy; ASTM A792 Type 1 / EN +AZ as ordered |
| Substrate grade | DX51D+AZ, S250GD+AZ, S350GD+AZ, ASTM CS / SS, JIS SGLCC, or grade to specification |
| Thickness | State nominal gauge and whether it includes metallic coating |
| Width | Coil width and tolerance; slit width where required |
| Coating mass | EN AZ100 / AZ150 / AZ185 or specified ASTM AZ / AZM designation |
| Finish / treatment | Metallic surface appearance, passivated, chromate-free or anti-fingerprint treatment as agreed |
| Coil dimensions | Coil ID, maximum OD, coil weight range and winding condition |
| Inspection | Coating mass, base metal properties, dimensions, bend/adhesion and MTC as ordered |
All dimensions, grade combinations, coating finishes and minimum order quantities are subject to supply confirmation.
Use this short sequence to reduce back-and-forth on price and delivery.
ASTM, EN, GB, JIS and AS label and test requirements differ. Match the purchase order, material certificate and coating designation to the same specification.
55% aluminum-zinc alloy-coated steel sheet in coil and cut-length form. Specify Type 1 Al-Zn-Si where conventional Galvalume is required.
General tolerances and test requirements for hot-dip metallic-coated sheet; applicable subject to the ordered product standard.
Continuous hot-dip coated steel flat products including AZ coating. Confirm the national adoption and edition named in the purchase order.
Continuous hot-dip zinc and zinc-alloy coated sheet and strip; includes the former GB/T 14978 product family.
Dimensions, shape, mass and permissible deviations for continuous hot-dip coated sheet and strip.
Hot-dip 55% Al-Zn products under JIS; metallic-coated sheet and strip under AS requirements.
In China, GB/T 14978-2008 is withdrawn and was superseded by GB/T 2518-2019. For EN orders previously using EN 10346:2015, verify the edition applicable to your procurement contract.
The coating designation is a central buying decision. Specify the required minimum total coating mass on both faces, test method and contract standard. Galvalume uses an Al-Zn-Si coating, while conventional hot-dip galvanized steel uses predominantly zinc coating.
| Designation | Min. triple-spot, both faces | Typical purpose |
|---|---|---|
| AZ100 | 100 g/m² | Selected formed components |
| AZ150 | 150 g/m² | Roof / wall profiles by design |
| AZ185 | 185 g/m² | Higher coating-mass requirement |
Reference EN 10346 AZ mass classes. Surface exposure, substrate strength, forming severity and project specification determine the suitable coating class.
| Inch-pound designation | SI designation | ASTM basis |
|---|---|---|
| AZ50 | AZM150 | 0.50 oz/ft² or 150 g/m² |
| AZ55 | AZM165 | 0.55 oz/ft² or 165 g/m² |
| AZ60 | AZM180 | 0.60 oz/ft² or 180 g/m² |
ASTM inch-pound and SI designations represent separate unit systems. Their coating-test rules must be taken from the ordered ASTM edition; they are not blanket equivalents to EN grades.
Common quote combinations illustrate how nominal base-metal gauge, width and total coating mass affect linear weight. Confirm your requested coil dimensions and tolerances with the supply team.
| Steel base thickness | Coil width | Reference coating | Theoretical kg/m strip | Estimate |
|---|---|---|---|---|
| 0.30 mm | 1,000 mm | AZ100 | 2.455 kg/m | |
| 0.35 mm | 1,200 mm | AZ150 | 3.477 kg/m | |
| 0.40 mm | 1,219 mm | AZ150 | 4.011 kg/m | |
| 0.45 mm | 1,250 mm | AZ150 | 4.603 kg/m | |
| 0.50 mm | 1,000 mm | AZ150 | 4.075 kg/m | |
| 0.50 mm | 1,200 mm | AZ185 | 4.932 kg/m | |
| 0.60 mm | 1,250 mm | AZ150 | 6.075 kg/m | |
| 0.70 mm | 1,200 mm | AZ185 | 6.816 kg/m | |
| 0.80 mm | 1,250 mm | AZ185 | 8.081 kg/m | |
| 1.00 mm | 1,250 mm | AZ150 | 10.000 kg/m |
Reference combinations, not a stock list. kg/m estimates use steel density 7,850 kg/m³ and total two-sided coating mass; actual thickness, coating and manufacturing tolerances affect delivered weight.
Estimate how many metres of coated strip are in a coil using the nominal steel-base thickness, width, two-sided AZ coating mass and coil mass. Use confirmed coil data for production yield planning.
Treat thickness here as the steel substrate alone. Coating mass is added separately. Actual paid mass, coating tests and tolerance definitions follow the selected purchase standard.
Calculate lineal metres from coil mass before setting up roofing or sheet-forming runs. The estimate supports cutting plans and preliminary freight calculations; certified delivery weight comes from shipment and inspection records.
Formula: nominal kg/m = width (m) × [steel-base thickness (mm) × steel density (g/cm³) + coating mass (kg/m²)]. Estimated length (m) = coil mass (kg) ÷ nominal kg/m. Edge trim, winding, coatings and production tolerances can change actual yield.
Galvalume coil is widely used as metallic-coated feedstock for profiled building sheet and selected formed components. Match coating protection, grade and bend radius to the finished design and service conditions.
Roll-formed roof sheets, wall cladding, ridge flashing and related components. Confirm surface treatment, profile tooling, bending requirements, roof specification and expected exposure.
Metallic-coated coil can feed profiled cladding, composite panel lines and sheet fabricators. Check substrate grade, flatness, coating class and any further paint-system requirements.
Roofing, flashings, channels and folded sections where forming properties and coating adhesion are important.
Al-Zn metallic-coated substrate for a specified organic paint system, subject to surface treatment and paint-line requirements.
Selected appliance and fabricated panels requiring an agreed combination of metal coating, appearance and forming performance.
Use company manufacturing scale and a defined coil specification to plan repeat purchases. Overall corporate figures describe the wider steel operation, while Galvalume grade and coil availability are checked for each request.
Large-scale steel production and factory infrastructure support industrial supply planning across the product portfolio.
Compare ASTM, EN, GB, JIS and AS requests by the actual product designation, coating class and forming use.
Specify material certificates, coating-mass inspection, dimensions and test documentation before production or shipment.
Agree coil ID, package mass, moisture protection, edge guards and transport details for your unloading equipment.
The typical route uses prepared cold-rolled strip, a continuously controlled hot-dip Al-Zn-Si bath, cooling and surface treatment before coiling. Ordering requirements govern the base steel grade, coating mass, surface and mechanical properties.
Cold-rolled substrate and required mechanical grade are selected for the final product geometry.
Steel strip is coated and coating mass controlled for the ordered Type 1 or +AZ specification.
Surface treatment, slitting if agreed, winding and packing details are confirmed before dispatch.
For repeat roofing or panel orders, the grade, coating designation and finished width should stay consistent between production lots. BAOSTEEL METAL reviews requested quantities, suitable coils and delivery timing against current arrangements.
Acceptance criteria are defined by the product standard, grade and order options. Request relevant mill testing and inspection documentation for the material and metallic coating.
Package selection follows the coating surface, coil weight, lifting equipment and destination climate. Agree wrapping and identification before loading, particularly for longer sea-freight routes.
Keep preparation requirements concise and measurable. Any requested services are checked against grade, coating, finished width and order quantity.
Compare coated substrate, painted coil and finished building sheet options. Each product form has its own purchase specification.
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It is steel strip coated by a continuous hot-dip process with a nominal 55% aluminum, 1.6% silicon and balance zinc alloy. This metallic coating is commonly specified for roofing, cladding and steel sheet products.
Conventional galvanized coil uses a zinc-rich coating. Galvalume uses an aluminum-zinc-silicon alloy coating. Selection depends on exposure, edge conditions, forming process, coating mass and the project standard.
Common EN +AZ coating mass references include AZ100, AZ150 and AZ185. ASTM A792 uses its own AZ50, AZ55 or corresponding AZM designation system. State the required standard and minimum coating mass rather than comparing label names alone.
Under the applicable EN coating-mass convention, AZ150 refers to 150 g/m² as the minimum triple-spot coating mass total over both faces. Additional single-spot requirements are defined by the chosen product standard.
DX51D is a common forming-steel designation in EN-based metallic-coated flat products. Check the exact standard edition, nominal gauge, bend radius, surface and coating adhesion for the intended profile before production.
Yes, appropriately prepared Al-Zn coated strip can serve as prepainted Galvalume substrate. The paint system, surface treatment, prepainted product standard and forming requirements must be specified separately.
Estimate length from coil mass divided by strip mass per metre. Include substrate steel thickness, width, density and the two-sided metallic coating mass. The calculator above provides a nominal estimate.
Typical requests include coating mass, thickness and width tolerance, base-metal chemistry or mechanical properties, surface appearance, bending or coating adhesion and a mill test certificate to the chosen order standard.
Send the applicable standard, grade, Al-Zn coating designation, steel thickness basis, width, required finish, coil ID, individual coil weight, total tonnage, destination and inspection requirements.
Send your AZ class, base grade, thickness, width, surface treatment, coil weight and required tonnage. Our sales team will review the material specification, supply arrangement and export packing for your request.
Send your required grade, dimensions, quantity and destination. Our team will review the inquiry.
