hot dip galvanized steel
Structural steel plate hot dip galvanized S280GD+Z,S280GD,S280GD+ZF are rolled according to steel standard EN 10147.Sealed treatment for galvanized steel plate and coil S280GD+Z,S280GD,S280GD+ZF shall be chosed after rolled finished,application of a transparent organic film coating of mass about 1g/m2.This treatment for zinc coated steel sheet S280GD+Z,S280GD,S280GD+ZF offers additional corrosion protection,especially the protection against fingerprints.It may improve the sliding characteristics during forming operations and can be used as a priming coat for subsequent varnishing.
The end users of S280GD+Z,S280GD,S280GD+ZF also can choose the treatment as Phosphated,this treatment improves the adherence and protective effect of a coating applied by processor.
Hot Dipped Galvanized Steel Sheet in Coil (GI) is produced by passing the Full Hard sheet which has undergone the acid washing process and rolling process through the zinc pot, thereby applying zinc film to the surface. It has excellent corrosion resistance, paintability, and workability due to Zinc's characteristics. Usually, hot-dipped galvanized steel sheet and galvanized steel coil process and specifications are basically the same.
Specifications Table
|
GALVANIZED STEEL COIL |
|
|
Standard |
ISO,JIS,AS EN,ASTM |
|
Grade |
Q195 Q235 Q345 |
|
SGCC SGCH SGC340 SGC400 SGC440 SGC490 SGC570 |
|
|
SGHC SGH340 SGH400 SGH440 SGH490 SGH540 |
|
|
DX51D DX52D DX53D DX54D DX55D DX56D DX57D |
|
|
S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD |
|
|
SS230 SS250 SS275 |
|
|
Width |
600mm to 1500mm |
|
Thickness |
0.125mm to 3.5mm |
|
Zinc coating |
40g/m2 to 275g/m2 |
|
Coil weight |
3 tons to 6 tons |
|
Coil ID |
508mm or 610mm |
|
Surface treatment |
Unoil,Dry,Chromate Passivated, Non-chromate Passivated |
|
Spangle |
Regular Spangle, minimum Spangle,Large Spangle, Zero Spangle |
|
Capacity |
1,500,000MT/year |
|
Delivery |
15-25 Days |
|
Spangle |
Big Medium Small Zero |
|
Zinc Coating |
30-275g/m2 |
|
Coil Weight |
3-8 Tons |
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.
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
Ti |
|
Forcold Forming Chinese Standard |
DX51D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
DX52D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX53D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX54D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX56D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
DX57D+Z |
0.12 |
0.50 |
0.60 |
0.100 |
0.045 |
0.30 |
|
|
Forcold Forming Japanese Standard |
SGCC |
0.15 |
0.50 |
0.80 |
0.050 |
0.030 |
0.025 |
|
SGCD1 |
0.12 |
0.50 |
0.60 |
0.040 |
0.030 |
0.025 |
|
|
SGCD3 |
0.08 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
SGCD4 |
0.06 |
0.50 |
0.45 |
0.030 |
0.030 |
0.025 |
|
|
For Structure Japanese Standard |
SGC340 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.025 |
|
SGC400 |
0.25 |
0.50 |
1.70 |
0.200 |
0.035 |
0.150 |
|
|
SGC490 |
0.30 |
0.50 |
2.00 |
0.200 |
0.035 |
0.025 |
|
|
SGC510 |
0.30 |
0.50 |
2.50 |
0.200 |
0.035 |
0.025 |
|
|
For Structure AISI Standard |
S220GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
S250GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S280GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S320GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.025 |
|
|
S350GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
|
|
S550GD+Z |
0.20 |
0.60 |
0.70 |
0.100 |
0.045 |
0.150 |
Mechanical Properties
|
Grade |
Yield Strength MPa≥ |
Tensile Strength MPa≥ |
Elongation A%≥ |
|
DX51D Z/ZM/AZ/AM |
240-380 |
270-500 |
22 |
|
DX52D Z/ZM/AZ/AM |
140-300 |
270-420 |
26 |
|
DX53D Z/ZM/AZ/AM |
140-260 |
270-380 |
30 |
|
DX54D Z/ZM/AZ/AM |
120-220 |
260-350 |
36 |
|
S220GD Z/ZM/AM |
220 |
300 |
20 |
|
S250GD Z/ZM/AZ/AM |
250 |
330 |
19 |
|
S280GD Z/ZM/AM |
280 |
360 |
18 |
|
S300GD A/AM |
300 |
380 |
18 |
|
S320GD Z/ZM/AM |
320 |
390 |
17 |
|
S350GD Z/ZM/AZ/AM |
350 |
420 |
16 |
|
S450GD A/AM |
450 |
480 |
15 |
|
S550GD Z/ZM/AZ/AM |
550 |
550 |
- |
FAQ：
What are common coating types available on S280GD?
S280GD can be galvanized with pure zinc (+Z), zinc-iron (+ZF), zinc-aluminum (+ZA), zinc-magnesium (+ZM), aluminum-zinc (+AZ) and aluminum-silicon (+AS).
What is the minimum yield strength of S280GD?
Minimum yield strength (Rp0.2) is 280 MPa.
What is the typical tensile strength?
Minimum tensile strength is around 360 MPa.
What is the minimum elongation?
Minimum elongation A80 is typically 18 % (varies slightly with thickness).
What thicknesses are available for S280GD sheet/coils?
Thickness can range from about 0.12 mm up to 6.0 mm or more upon request.
Can S280GD be supplied with customized widths and lengths?
Yes - widths (e.g., 600–2000 mm) and lengths/coils can be customized