Hot Dip Aluminium-zinc Alloy Coating Steel S220GD+AZ

S220GD refers to hot-dip coated structural steel grade with specified minimum yield strength of 220MPa, dedicated for forming and structural use.+AZ represents classic galvalume coating with standardized composition: 55% Aluminum + 43.4% Zinc + 1.6% Silicon.Different from deep drawing series steel, S220GD+AZ focuses on high structural strength and comprehensive weather resistance, balancing mechanical property, coating protection and economic cost. The compact alloy coating forms dual barrier and sacrificial anti-corrosion protection, with better high temperature resistance, heat reflection and surface stability than traditional hot dipped galvanized steel.

S220GD+AZ Galvalume Steel Coil is a hot-dip 55% aluminum-zinc-silicon alloy coated structural steel coil, featured with stable yield strength, excellent structural rigidity, outstanding atmospheric corrosion resistance and good bending & forming performance. As a mainstream structural-grade galvalume steel material, it perfectly solving customers' worries about structural load-bearing, outdoor rusting, short service life and unstable processing quality. It is the preferred raw material for construction, engineering structures, transportation and general industrial manufacturing.

*According to EN 10346-2015.

*The following minimum elongation values apply for different thicknesses:

0.5mm < t ≤ 0.7mm: minimum elongation is reduced by 2% from the values in the table.

0.35mm < t ≤ 0.5mm: minimum elongation is reduced by 4% from the values in the table.

t ≤ 0.35mm: minimum elongation is reduced by 7% from the values in the table.

Construction industry: Metal roof, wall panel, purlin, warehouse enclosure, light steel structure accessories

General industry: Equipment shell, ventilation duct, storage shelf, factory profile

Transportation: Vehicle compartment board, logistics equipment structural parts

New energy: Solar support accessories, environmental protection equipment shell

Deep processing: Raw material for PPGL color coated steel, stamped and profiled parts

Q1: What does S220GD+AZ mean?

A1: S220GD is structural hot-dip coated steel grade with 220MPa minimum yield strength; +AZ refers to 55% aluminum-zinc-silicon galvalume protective coating.

Q2: What is the difference between S220GD+AZ and deep drawing grade DC series galvalume?

A2: S220GD focuses on structural strength and load-bearing performance, more suitable for building and engineering structural parts; DC series is for complex deep drawing and stamping processing.

Q3: How to choose among AZ150, AZ180 and AZ200?

A3: Inland dry areas choose AZ150 for cost saving; humid and urban industrial areas choose AZ180; coastal and heavily polluted industrial areas prioritize AZ200.

Q4: Can S220GD+AZ be used for outdoor long-term exposure?

A4: Yes, all three coating weights are applicable to outdoor use. Thick coating AZ200 is highly recommended for high corrosion areas.

Q5: What size specifications can be customized?

A5: Conventional thickness 0.2–2.0mm, width 600–1500mm, coil weight and inner diameter can be customized according to demand.

Q6: Is surface treatment available for options?

A6: Multiple treatments are optional: anti-fingerprint, chromated passivation, non-chromate treatment, oiled or dry surface.

Q7: Can you provide official test reports?

A7: Yes, factory factory test certificate is provided, and SGS, BV, TÜV third-party inspection can be supported.

Q8: Is galvalume coil environmentally friendly and recyclable?

A8: The whole material is recyclable, with low environmental impact, meeting global environmental protection and green building material standards.

Send your inquiry right now to get the latest quotation, detailed technical parameter sheet and free sample support. Our professional sales team will reply to you within 24 hours and customize the most cost-effective material solution for your project.

Hot Tags: hot dip aluminium-zinc alloy coating steel s220gd+az, China hot dip aluminium-zinc alloy coating steel s220gd+az manufacturers, suppliers, factory