핫 롤 스틸 코일 ST37 표준 크기

Classification of galvanized reel substrate

Hot dip galvanized substrate: The organic coating on the hot dip galvanized steel plate to obtain the product is hot dip galvanized color coated plate. In addition to the protective effect of zinc, the organic coating on the surface also plays the role of isolation protection and rust prevention, and the service life is longer than that of hot galvanized sheet. The zinc content of hot-dip galvanized substrate is generally 180g/m2 (double-sided), and the maximum zinc content of hot-dip galvanized substrate used for external construction is 275g/m2.

Hot aluminized zinc substrate: The hot aluminized zinc steel plate (55%Al-Zn) is used as the new coating substrate, usually containing 150g/m2 aluminum zinc (double sided). The corrosion resistance of hot - plated aluminum zinc plate is 2-5 times that of hot - plated zinc plate. Continuous or intermittent use at temperatures up to 490ºC will not cause severe oxidation or oxide skin. The ability to reflect heat and light is twice that of hot-dip galvanized steel plate, and the reflectance is greater than 0.75, which is the ideal building material to save energy.

Electroplated zinc substrate: electrogalvanized plate for the substrate, coated with organic coating baking products for electric galvanized color coated plate, because of the thin zinc layer of electrogalvanized plate, usually zinc content is 20/20g/m2, so the product is not suitable for use in outdoor production of walls, roofs, etc. But because of its beautiful appearance and excellent processing properties, it can be mainly used in household appliances, audio, steel furniture, interior decoration, etc.

Characteristics of galvanized reel substrate

Electroplated zinc substrate: the coating is thinner, corrosion resistance is not as good as hot dip galvanized substrate

Hot dip galvanized substrate: the thin steel plate is immersed in the melted zinc groove, so that the surface adhesion of a layer of zinc, this galvanized plate has good coating tightness and weldability

Hot aluminized zinc substrate: The product is plated with 55% Al-Zn, has excellent corrosion resistance, its service life is more than four times that of ordinary galvanized steel plate. It is the replacement product of galvanized sheet

Type of galvanized coil

Polyester (PE): Good adhesion, wide range in formability and outdoor durability, moderate chemical resistance, low cost

Silicon modified polyester: namely (SMP), the coating has good hardness, wear resistance and heat resistance, as well as good external durability and powder resistance, luster retention, flexibility, medium cost

High durability polyester: namely (HDP), excellent color retention and UV resistance, excellent outdoor durability and powder resistance, good film adhesion, rich color, excellent cost performance

Polyvinylidene fluoride: namely (PVDF), excellent color retention and UV resistance, excellent outdoor durability and powder resistance, excellent solvent resistance, good formability, dirt resistance, limited color, high cost

Product name

Galvanized steel coil

grade

DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z, DX56D+Z, DX57D+Z, DC51D+Z, SGCC, SGCD, S220GD+Z, S250GD+Z, S280GD+Z, S320GD+Z, S350GD+Z, S550GD+Z, etc

thickness

0.12-4mm

width

600-1500m

length

1-12m or according to customer's request

Coil weight

3-8 tons or according to customer requirements

Galvanized coating

Z25G-275G/M2 or according to customer requirements

tolerance

+/-1%

Inside diameter of coil

508/610mm

Surface structure

Regular zinc flower, minimum zinc flower, zero glitter, large glitter

Surface treatment

Chemical passivation, oil coating, oil free, passivation + oil, anti-fingerprint, chrome, skin through, high weather resistance, etc

hardness

Soft hard, medium hard, full hard(according to the customer's requests)