Galvanized steel coil
Galvanized steel coil,immersing the thin steel plate in the molten zinc bath, adhering a layer of zinc thin steelsheet on the surface.It is mainly produced by continuous galvanizing process,that is,the coiled steel plate iscontinuously immersed in the zinc-melted plating tank to make galvanized steel sheet; alloyed galvanized steelplate. This kind of steel plate is also made by hot dipped method, but it is heated to about 500 C immediately afterexiting the tank to form an alloy film of zinc and iron. This galvanized coil has g0od paint adhesion and weldability.
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Product Name |
Galvanized Coil |
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Material |
Dx51D, Dx52D, Dx53D, DX54D, S220GD, S250GD, S280GD, S350GD, S350GD, S550GD; SGCC, SGHC, SGCH, SGH340, SGH400, SGH440, SGH490, |
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SGH540, SGCD1, SGCD2, SGCD3, SGC340, SGC340 , SGC490, SGC570; SQ CR22 (230), SQ CR22 (255), SQ CR40 (275), SQ CR50 (340), SQ |
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CR80(550), CQ, FS, DDS, EDDS, SQ CR33 (230), SQ CR37 (255), SQCR40 (275), SQ CR50 (340), SQ CR80 (550); or Customer's Requirement |
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Thickness |
0.12-6.00mm or customer's requirement |
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Width |
600mm-1500mm, according to customer's requirement |
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Zinc coated |
30g-275g/m2 |
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Type of Coating |
Hot Dipped Galvanized Steel |
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Surface Treatment |
Passivation(C), Oiling(O), Lacquer sealing(L), Phosphating(P), Untreated(U) |
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Surface Structure |
Normal spangle coating(NS), minimized spangle coating(MS), spangle-free(FS) |
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Coil Weight |
3-20 metric ton per coil |
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Standard |
JIS 3302 / ASTM A653 /EN10143 AISI , ASTM , DIN , GB , JIS G3302 G3312 G3321 , BS |
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Technique |
Hot Rolled / Cold Rolled |
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Product Application |
1. Fence, greenhouse, door pipe,greenhouse |
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2. Low pressure liquid, water, gas, oil, line pipe |
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3. For both indoor and outdoor the building construction |
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4. Widely used in scaffolding construction which is much cheaper and convenient |
Surface Treatment
Spangle is formed during the hot-dip galvanizing process. The size, brightness, and surface of spangles mainly depend on the composition of zinc layer and the cooling method. According to the size, it includes small spangles, regular spangles, big spangles, and free spangles. They look different, but the spangles almost will not influence the quality of galvanized steel. You can choose according to your preference and purpose.
Surface Quality
Normal surface (A)
Imperfections such as pimples, marks, scratches, pits, variations in surface appearance, dark spots, stripe marks and light passivation stains are permissible. Stretch levelling breaks or run-off marks may appear. Coil breaks and stretcher strains may appear as well. Surface quality A has a shiny appearance.
Improved surface (B)
Surface quality B is obtained by skin passing. With this surface quality, small imperfections such as stretch levelling breaks, skin pass marks, slight scratches, surface structure, run-off marks and light passivation stains are permissible. Surface quality B has a matte appearance.
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Coating designation |
Minimum total coating mass, both surfaces * |
Guidance value for coating thickness per surface |
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Z100 |
100 |
7 |
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Z140 |
140 |
10 |
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Z180 |
180 |
13 |
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Z200 |
200 |
14 |
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Z225 |
225 |
16 |
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Z275 |
275 |
20 |
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Z350 |
350 |
25 |
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Z450 |
450 |
32 |
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Z600 |
600 |
42 |
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ZA095 |
95 |
7 |
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ZA130 |
130 |
10 |
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ZA155 |
155 |
11 |
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ZA185 |
185 |
14 |
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ZA200 |
200 |
15 |
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ZA255 |
255 |
20 |
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ZA300 |
300 |
23 |
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ZF080 |
80 |
6 |
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ZF100 |
100 |
7 |
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ZF120 |
120 |
8 |
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ZF140 |
140 |
10 |
Available Steel Grade
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Available Steel Grade(Ensure weight and support third-party testing) |
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Steel grade |
Coating |
Yield(MPA) |
Tensile(MPA) |
Elongation(%) |
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DX51D |
Z,ZF |
-- |
270-500 |
20 |
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DX52D |
Z,ZF |
140-300 |
270-420 |
22 |
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DX53D |
Z,ZF |
140-260 |
270-380 |
26 |
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DX54D |
Z,ZF |
140-220 |
270-350 |
30 |
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S220GD |
Z,ZF |
220 |
300 |
18 |
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S250GD |
Z,ZF |
250 |
330 |
17 |
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S280GD |
Z,ZF |
280 |
360 |
16 |
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S320GD |
Z,ZF |
320 |
390 |
15 |
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S350GD |
Z,ZF |
350 |
420 |
14 |
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S400GD |
Z,ZF |
400 |
470 |
-- |
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S450GD |
Z,ZF |
450 |
530 |
-- |
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S500GD |
Z,ZF |
500 |
560 |
-- |
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Select type Galvanized Steel based on requirements |
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