A36 is an ASTM standard carbon steel grade. "Painted Zinc Coated" indicates a colored coating (such as PE, PVDF, etc.) applied to the zinc coating, providing both corrosion protection and decorative properties.

Zinc coating range: 30-275g/m² (common Z30-Z275)
Coating types: PE (polyester), PVDF (fluorocarbon), HDP (high-weather resistant), etc.

Thickness: 0.18-3.5mm (0.4-1.2mm is common in construction)
Width: 600-1500mm (customizable)
Coating hardness: 2H-3H (pencil hardness)
Weather resistance: 10-25 years (maximum for PVDF coating)

Applications
Construction: Metal roofs, siding (requires PVDF coating)
Industrial equipment: Containers, ventilation ducts (high-zinc coating Z275)
Home appliance manufacturing: Refrigerator panels, air conditioner casings (matte PPGI)

PPGI (Pre-Painted Galvanized Steel) is a pre-coated galvanized steel sheet. It achieves both corrosion protection and decorative properties by applying a colored coating (such as PE or PVDF) to a galvanized substrate.

Zinc coating range: 40-275g/m² (commonly Z40-Z275)
Coating types: PE (polyester), PVDF (fluorocarbon), HDP (high-performance thermal conductivity), etc.

Thickness: 0.12-5.0mm (0.4-1.2mm is common in construction)
Width: 600-1500mm (customizable)
Coating hardness: 2H-3H (pencil hardness)
Weather resistance: 10-25 years (maximum for PVDF coating)

Applications
Construction: Metal roofs and wall panels (requires PVDF coating)
Home appliance manufacturing: Refrigerator panels and air conditioner casings (matte PPGI)
Industrial equipment: Containers and ventilation ducts (high-zinc coating Z275)

Z275 indicates a zinc coating weight of 275g/m² (both sides combined). This high-zinc coating is suitable for highly corrosive environments or long-term outdoor use.
Substrate Types: DX51D/SGCC/S350GD
Primarily mild steel, S350GD is high-strength steel.
Thickness: 0.12-6.0mm
Commonly used in construction: 0.3-2.0mm
Coating Process: Hot-Dip Galvanizing (HDG)
Zero-sparkle finish available

Applications:
Construction: Metal roofs and siding (requires pre-painting)
Industrial Equipment: Chemical containers and cooling tower supports (high zinc coating for corrosion protection)
Home Appliance Manufacturing: Outdoor appliance housings (requires a zero-sparkle finish)

Galvanized Coil 304 typically refers to hot-dip galvanized steel coil on a 304 stainless steel base. It combines the corrosion resistance of stainless steel with the protective properties of a galvanized coating, making it suitable for use in highly corrosive environments. However, please note:

Standard differences: 304 stainless steel itself does not require galvanizing (its corrosion resistance is sufficient). In practice, it is often a composite process of 304 stainless steel + galvanizing, or a mislabeling of the galvanized base material.

Dx51D is a European standard (EN 10346) hot-dip galvanized steel coil. Its base material is low-carbon steel, resulting in a uniform zinc coating. It's suitable for applications in construction, home appliances, and automotive applications.

Zinc coating weight: 40-275g/m² (Z40-Z275). Z80-Z180 is commonly used in construction.
Thickness: 0.12-6.0mm, primarily cold-rolled.
Width: 600-1500mm, customizable.

Applications:
Building structures: Roofs and wall panels (Z120-Z180).
Home appliance manufacturing: Refrigerator and washing machine panels (zero-sparkle cold-rolled steel).
Automotive components: Chassis components (high-zinc hot-rolled steel).

Galvanized coil is a thin steel sheet coated with zinc via a hot-dip galvanizing process. It is primarily made of low-carbon steel. Depending on the process used, it can be categorized into standard galvanized coil and alloyed galvanized coil.
Standard galvanized coil uses hot-rolled or cold-rolled steel strip as its substrate. This type of sheet offers excellent corrosion resistance and a high surface finish, making it widely used in construction, home appliances, and automotive manufacturing.
Alloyed galvanized coil, which undergoes hot-dip galvanizing to further enhance coating adhesion and weldability, is commonly used in precision instrument manufacturing and transportation infrastructure.