galvanized steel
Z275 galvanized steel is a hot-dip galvanized steel product compliant with European Standard EN 10346. Recognized internationally as a high-protection-grade galvanized product, it offers an exceptionally long service life, making it the preferred corrosion-resistant metal material across multiple industries.With two hot-dip galvanizing production lines, we can manufacture galvanized products with zinc coating weights ranging from Z30 to Z275 g/m². Equipped with diverse processing machinery, we produce galvanized flat sheets, corrugated sheets, coil strips, and other forms.
S250GD galvanized steel from GNEE STEEL is a top choice for construction and manufacturing. Its strong zinc coating ensures corrosion resistance and durability.
Z275 GI Steel Specification
| Item | Z275 GI Steel |
| Thickness | 0.12mm – 6mm |
| Width | ≤1500mm |
| Length | Cut according to coil weight or length |
| Zinc Layer Thickness | 275g/㎡(G90) |
| Spangle Type | Zero spangles, Small spangles, Regular spangles, Big spangles |
| Product Type | Sheet/Coil/Strip |
| technology | Hot-dip galvanizing |
| Surface Treatment | Chromate passivation (C), Chromium-free passivation (C5), Fingerprint resistant treatment (N), Chromium-free fingerprint resistant treatment (N5), Oil coating (O) |
| Steel Grade | SGCC, SGCH, G250, G350, G550, A653, S250GD, S350GD, S550GD, DX51D, DX52D, DX53D, DX54D |
| Standard | GB, EN, JIS, DIN, ASTM |
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.
|
Coating designation |
Minimum total coating mass, both surfaces * |
Guidance value for coating thickness per surface |
|---|---|---|
|
Z100 |
100 |
7 |
|
Z140 |
140 |
10 |
|
Z180 |
180 |
13 |
|
Z200 |
200 |
14 |
|
Z225 |
225 |
16 |
|
Z275 |
275 |
20 |
|
Z350 |
350 |
25 |
|
Z450 |
450 |
32 |
|
Z600 |
600 |
42 |
|
ZA095 |
95 |
7 |
|
ZA130 |
130 |
10 |
|
ZA155 |
155 |
11 |
|
ZA185 |
185 |
14 |
|
ZA200 |
200 |
15 |
|
ZA255 |
255 |
20 |
|
ZA300 |
300 |
23 |
|
ZF080 |
80 |
6 |
|
ZF100 |
100 |
7 |
|
ZF120 |
120 |
8 |
|
ZF140 |
140 |
10 |
Coatings
The metal coated products are offered with Zinc (Z), Galfan zinc-aluminium (ZA), or Galvannealed zinc-iron alloy (ZF) coating. The cathodic corrosion protection of these metal coatings is in direct proportion to its thickness, i.e. a thick coating will provide better corrosion protection for the underlying steel than a thin coating. However, thin coatings are recommended for applications with high formability requirements.
Zinc
The Zinc (Z) coating has a composition consisting almost entirely of zinc (>99%) and is lead free, resulting in finely crystallized zinc spangle that meets high requirements for visual appearance. It is produced by hot-dip galvanizing process. Thanks to the good formability of lead-free coatings, the corrosion protection, for example, in areas which have been bent is good. The small spangle coating is designated by the letter M.
Galfan
Galfan (ZA) is a zinc-aluminium alloy coating with the eutectic composition approximately of 95% Zn and 5% Al. This coating has better anticorrosive and forming properties than normal zinc coatings. Galfan coating can be recognized by its bright metallic and mildly cellular-patterned surface. It is produced by hot-dip coating process.
Galvannealed
Galvannealed (ZF) is a zinc-iron alloy coating having an iron content of about 10%. This coating is produced by heat-treatment after continuous hot-dip coating process. ZF coated steels are excellent for resistance welding applications and are designed for use in high-quality painted products. Galvannealed coating can be recognized by its typically grayish, matte surface.
Available Steel Grade
|
Available Steel Grade(Ensure weight and support third-party testing) |
||||
|
Steel grade |
Coating |
Yield(MPA) |
Tensile(MPA) |
Elongation(%) |
|
DX51D |
Z,ZF |
-- |
270-500 |
20 |
|
DX52D |
Z,ZF |
140-300 |
270-420 |
22 |
|
DX53D |
Z,ZF |
140-260 |
270-380 |
26 |
|
DX54D |
Z,ZF |
140-220 |
270-350 |
30 |
|
S220GD |
Z,ZF |
220 |
300 |
18 |
|
S250GD |
Z,ZF |
250 |
330 |
17 |
|
S280GD |
Z,ZF |
280 |
360 |
16 |
|
S320GD |
Z,ZF |
320 |
390 |
15 |
|
S350GD |
Z,ZF |
350 |
420 |
14 |
|
S400GD |
Z,ZF |
400 |
470 |
-- |
|
S450GD |
Z,ZF |
450 |
530 |
-- |
|
S500GD |
Z,ZF |
500 |
560 |
-- |
|
Select type Galvanized Steel based on requirements |
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