55% aluminum-zinc coated coils for wholesale forming and distribution
Our aluminum-zinc-coated coil range covers 0.15–1.5 mm thickness and 600–1,500 mm width. Choose the base steel, metallic coating designation and surface treatment for panel forming or subsequent painting; commercial, forming and structural grades are separate selections.
| Parameter | Range or option | Supply detail |
|---|---|---|
| Catalog thickness | 0.15–1.5 mm | 0.0059–0.0591 in.; rounded conversion |
| Strip width | 600–1500 mm | 23.62–59.06 in.; rounded conversion |
| Coating family | 55% aluminum-zinc-silicon | Traditional Al-Zn-Si metallic coating |
| Material specifications | ASTM A792/A792M; EN 10346; JIS G 3321 | Steel grade and coating class stated under the chosen standard |
| Surface conditions | Oil, passivation, skin-pass, matt or anti-fingerprint treatment | Treatment selected for the subsequent operation |
| Supply preparation | Full-width coils; slit or cut-length requests | Processing scope and edge requirements stated in the quote |
| Coating requirement | Designation under the selected ASTM, EN or JIS specification | Quoted with the steel grade and strip dimensions |
The catalog uses millimeter dimensions. Each Al-Zn quotation pairs the specified coating designation with the grade, thickness-width combination and surface treatment. The coil schedule also identifies the thickness measurement basis and tolerances.
An AZ designation identifies the aluminum-zinc coating mass. It does not set the steel’s yield strength or its forming properties. A panel order needs both the specified coating class and the steel grade suited to the designed profile.
AZ50, AZ55 and AZ60 use the ASTM inch-pound system; AZM150, AZM165 and AZM180 use its SI system. Retain the full designation on the purchase line. EN and JIS also use AZ names, so an AZ number without the governing standard leaves the coating requirement ambiguous.
Find an ASTM coating designation or unit system.
| Designation | Specification / unit system | Minimum total coating | Unit |
|---|---|---|---|
| AZ50 | ASTM A792 — inch-pound | 0.50 | oz/ft² |
| AZ55 | ASTM A792 — inch-pound | 0.55 | oz/ft² |
| AZ60 | ASTM A792 — inch-pound | 0.60 | oz/ft² |
| AZM150 | ASTM A792M — SI | 150 | g/m² |
| AZM165 | ASTM A792M — SI | 165 | g/m² |
| AZM180 | ASTM A792M — SI | 180 | g/m² |
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Keep the governing standard, full coating designation and unit system on each material line. The selected specification sets the applicable single-spot and sampling requirements.
| Designation | Specification | Material identity | Selection basis |
|---|---|---|---|
| CS Type A / B | ASTM A792/A792M | Commercial steel | General sheet fabrication under the specified type |
| FS | ASTM A792/A792M | Forming steel | Formed parts with the specified forming properties |
| SS Grades 33 / 40 / 50 (inch-pound) | ASTM A792 | Structural steel | Grade selected for the member’s design strength |
| DX51D+AZ | EN 10346 | Steel for bending and profiling | Profile and bend requirements define the delivery condition |
| DX52D+AZ | EN 10346 | Drawing-quality coated steel | Material choice follows part geometry and forming severity |
| S350GD+AZ | EN 10346 | Structural coated steel | Named structural grade with a separate AZ coating requirement |
| SGLCC | JIS G 3321 | Commercial-quality Al-Zn coated steel | JIS grade, coating and finish retained on the order |
| SGLCD | JIS G 3321 | Drawing-quality Al-Zn coated steel | Forming requirement specified under the JIS material identity |
A structural profile starts with its required strength and base-steel thickness. A tight bend or drawn shape also needs suitable ductility and coating adhesion. Full-hard material has restricted formability; it is not a substitute for a specified forming grade. We retain the chosen ASTM, EN or JIS identity and list any proposed alternative separately.
The aluminum-zinc coating gives the sheet a silver crystalline surface. Skin-pass and matt conditions refine the delivered finish. For visible trim or panels, the order’s surface criteria cover appearance as well as marks that would remain after forming.
Our GL catalog includes oil, passivation and anti-fingerprint treatment. Each is a defined surface condition, not a paint color or an automatic clear-acrylic coating. The selected treatment must suit the forming lubricant, adhesive or subsequent coating process.
A painting line needs a metallic substrate with compatible treatment and preparation. Oil removal and pretreatment belong to that process. Factory color-painted Al-Zn material is a separate PPGL requirement with its own paint system; a bare metallic coil order does not include it.
Base-metal thickness excludes the Al-Zn layer; total coated thickness includes it. The order states the decimal dimension, tolerance and measurement basis used by the tooling or panel design. Coating mass cannot be used to make up a shortfall in specified base-steel thickness.
Requested slit widths carry their own width, burr and camber limits. Cutting exposes the steel at the edge; adjacent zinc in the alloy contributes local protection, while the component’s thickness and exposure determine further edge treatment. Loose cutting debris is removed to protect the visible metallic face.
Coil inside diameter, maximum outside diameter and individual weight follow the uncoiler and handling limits. Winding direction and the visible-face orientation matter when feeding exposed panels. The accepted coil schedule carries these requirements through to packing and coil identification.
Roll-formed panels need the profile’s specified base-steel grade, thickness and AZ coating. Bend radii and tooling must preserve the coating through forming. We quote the input coil; panel span, connections and weather-tightness follow the finished building-product design.
The galvanized versus aluminum-zinc roofing guide compares the coating choice with the finished roof conditions.
Narrow slit material for flashing and trim needs clean edges and a consistent exposed face. Tight folds make the forming condition especially important. The part’s bend geometry sets the material and surface acceptance rather than a coating designation alone.
Drawn housings, pressed covers and folded components need material selected for their geometry. Bend severity and any stretched areas determine the forming properties and adhesion checks. Part acceptance includes the coating’s condition at those strained areas, rather than relying on a general commercial-grade description.
Receiving dimensions are checked on the stated base-metal or coated-thickness basis. Width, edge condition and any slit-width tolerance follow the accepted line item. Coil geometry is checked against the feed and handling requirements.
The coating record names the Al-Zn family, designation, unit system and measurement method. Applicable triple-spot and single-spot criteria control coating acceptance. A surface-gauge reading alone does not establish every requirement of the material standard.
Forming-sensitive orders retain the agreed bend or coating-adhesion checks alongside the steel properties. Surface acceptance addresses scratches, abrasion and coating defects that affect the intended exposed face or subsequent finish.
Individual coil numbers connect the steel, Al-Zn coating and inspection documents to the packing list. Required records are quoted with the selected material and surface condition.
Al-Zn coil prices identify the steel grade, coating designation, currency and net-weight unit. Surface treatment, slit preparation, packing and freight are itemized with the lot and dispatch terms.
Our packing quotation defines dry barrier protection, side and eye guards, strapping and the shipping cradle. Metallic surfaces destined to remain visible need protection against moisture and rubbing. The packing-list requirements include coil identities and individual net/gross weights.
Coils are stored under cover, clear of standing water and with condensation controlled. Wet wrapping is dealt with promptly on receipt. A protective treatment does not replace dry handling; trapped moisture can mark the tightly wound Al-Zn surfaces before the coil reaches the forming line.
No. AZM is used for the SI coating-mass designations in ASTM A792M. It does not identify magnesium content. This page covers traditional aluminum-zinc-silicon coating; a magnesium-modified coating is a separate material requirement.
Wet-concrete contact, strong alkaline exposure and livestock-confinement conditions are unsuitable applications for ordinary Al-Zn coated sheet. General agricultural roofing is a different exposure. Copper, lead and copper-treated timber, including runoff from incompatible materials, also affect material selection. Severe marine or chemical conditions require a protection system selected for that environment.
AZ55 defines the coating requirement for the coil. It does not specify a roof assembly, installation or warranty period. The finished panel system has its own product requirements and warranty terms; ordering a coating class does not establish them.
No. Dark marks can have different causes, including surface abrasion or wet-storage oxidation. Record the coil identity, packing condition and affected area when receiving the material. The agreed appearance and material acceptance criteria determine the disposition; color alone is not a complete diagnosis.
The coating families use different product specifications and designations. Al-Zn and zinc coating requirements remain separate on the order, even when the strip dimensions and silver appearance are similar.
Prepainted Al-Zn steel has its own substrate, metallic coating and paint-system specification. A PPGL request is reviewed separately from bare Al-Zn coil and from the galvanized-substrate PPGI range.
Send your aluminum-zinc coil schedule and destination. Our quote covers the steel grade, AZ coating, strip dimensions and coil quantity, with surface treatment and preparation itemized.