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Stainless Steel Coil
Color-coated stainless steel coil is a composite material with one or more layers of organic coating (such as PVDF, PE, PET, etc.) coated on the surface of a stainless steel substrate. It combines the corrosion resistance of stainless steel with the decorative and weather resistance of the coating. It is widely used in the fields of construction, home appliances, transportation, etc., which not only meets functional requirements but also improves aesthetics.
Product characteristics
1. Aesthetics:
The surface is covered with colored coatings (such as PVDF, PE, PET, etc.), providing a variety of colors and gloss options, and is highly decorative.
2. Corrosion resistance:
The stainless steel substrate (such as 304, 316) is corrosion-resistant in itself, and the coating further isolates environmental erosion and extends its life.
3. Weather resistance:
The coating is UV-resistant, acid-resistant, and suitable for outdoor use (such as building curtain walls).
4. Easy processing:
It can be cut, bent, and stamped to meet different processing needs.
5. Environmental protection:
Some coatings are chromium-free and meet RoHS and other environmental protection standards.
6. Cleaning and maintenance:
The surface is smooth, not easy to stain, and easy to clean.
Common specifications
|
Parameter |
Typical range/option |
|
Base material type |
Austenitic stainless steel (304, 316L), ferrite (430), etc |
|
Thickness |
0.3mm~3.0mm (common 0.5mm, 1.0mm) |
|
Width |
600mm~1500mm (customizable strips) |
|
Coating type |
PVDF (super weatherproof), PE (polyester), HDP (high weatherproof) |
|
Coating thickness |
15~30μm (double-sided) |
|
Surface state |
Embossing, 2B glossy, BA mirror, brushed, etc. |
|
Roll weight |
3~10 tons (depending on thickness and width) |
Chemical properties
Substrate composition (taking 304 as an example):
Cr (17~20%), Ni (8~11%), C (≤0.08%), providing passivation film anti-rust ability.
Coating performance:
- Salt spray resistance: ≥1000 hours (PVDF coating, ASTM B117 standard).
- Acid and alkali resistance: no shedding in the pH range of 2~12 (immersion test).
- Solvent resistance: resist wiping with common solvents such as alcohol and gasoline.
Mechanical properties
|
Performance index |
Typical value (304 base material) |
Test standard |
|
Tensile strength (MPa) |
520~750 |
ASTM A240 |
|
Yield strength (MPa) |
≥205 |
ASTM A240 |
|
Elongation (%) |
≥40 (50mm gauge length) |
ASTM E8 |
|
Hardness (HV) |
150~200 |
ASTM E92 |
|
Bending performance |
No cracking at 180° bending (T≤1mm) |
ASTM D4145 |
Main uses
1. Architectural decoration: curtain walls, roofs, elevator interiors, billboards (such as airports and shopping malls).
2. Home appliance industry: high-end refrigerator panels, oven shells, range hoods.
3. Transportation: subway/high-speed rail interior panels, ship bulkheads.
4. Industrial equipment: chemical tank protective layer, food processing equipment cover.
5. Household items: cabinet panels, bathroom partitions, artistic decorative pieces.
