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0.5mm prepainted galvalume steel refers to a 0.5 mm thick cold-rolled steel substrate coated with a 55% aluminum-zinc alloy layer (AZ coating) and then finished with two coats of baked-on paint (top 25 µm PVDF, bottom 10 µm polyester). The result is a lightweight yet highly corrosion-resistant sheet that outperforms galvanized steel by up to 6× in salt-spray tests (ASTM B117). It is a “lightweight+budget” dual solution for roofs, walls, appliances, and furniture.

Mechanical & coating performance

Yield strength ≥345 MPa, tensile ≥420 MPa, elongation ≥18%. Reverse impact ≥9 J, T-bend 0–2T without cracking. Salt spray ≥1000 h for PVDF, UV resistance ΔE≤5 after 2000 h (QUV-A).

Roofing: 0.5 mm prepainted galvalume corrugated sheet allows 1.5 m purlin spacing in low-slope industrial roofs, cutting steel usage by 12%.

Cold-room panels: 0.5 mm ppgl outer skin meets fire rating EN13501-1 B-s1,d0 while keeping panel weight ≤10 kg/m².

Solar mounting: thin-gauge alu-zinc color coil forms lightweight rails that reduce freight cost per MW by 4%.

Q1: Can 0.5 mm prepainted galvalume steel be bent 180° without paint cracking?

A: Yes, with PVDF 25 µm and T-bend 0T, no cracking per ASTM D4145.

Q2: How many tons can fit in a 20’GP?

A: Approx. 25 tons of 0.5 mm coil, ID 508 mm, 8–10 coils.

Q3: Is AZ70 overkill for inland roofing?

A: For rural RH<60%, AZ50 gives 25-year life; AZ70 adds 10 years but increases cost USD 5% —ROI only positive within 5 km of coastline or chemical zones.

We are an integrated industrial and trade company that can produce steel independently and reduce costs.

From raw materials to finished products, we control quality throughout the process to ensure that the products meet customer requirements.

The combination of production and sales confidentiality can respond to orders quickly and shorten delivery time.

One-stop service, from consultation to production, and finally to after-sales service, provides all-round support.

We are self-produced, reducing dependence on external price fluctuations. In the face of sudden price increases, we can still deliver quickly and on time.

For inventory steel, we can provide preferential prices.

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