More feature about our aluzinc steel coil
1. Standard of aluzinc steel coil: ASTM 792
2. Material: CS, DX51D + AZ or SGLCC
3. Surface treatment of the galvalume steel: Chromated. Oiled, bright finish, fingerprint resistance
4. Thickness of the galvalume steel: 0.2mm-2.5 mm
5. Width of the galvalume steel: 800mm-1, 250mm, we can slit our regular width into what you want, for examples slit 1200 mm into 3*400 mm;
6. Coating weight: AZ 50 - AZ150
7. Al-Zn coated steel base on cold rolled steel, 55% Al, 45%Zn;
8. Both coil and sheet are available
9. Galvalume steel ID: 508mm.
10 weight per coil: 4-5 tons generally
11 container: We use 20' container generally, can load 25-27 tons max
12 our MOQ: 25 tons (1*20' FCL)
13. Applications: General use, construction industry, household appliance industry, automobile industry and industrial instruments
14. Package: Standard export packing, use waterproof paper, steel sheet, protective steel angle etc
15. Loading port: Shanghai port, Changzhou port, etc
16. Payment term: T/T and L/C at sight
17. Delivery time: 20-30 days generally
Summarization:
Aluminium-zinc alloy armor plate, is called Al-Zn coated plate for short Strips, after through three processes, including payoff reel, crop shear and welding, enter into the continuous annealing furnace. During the annealing process, strips are heated closer to the recrystallizing temperature, and then heated to 20~50º C above the recrystallizing temperature in the reducing furnace. After keeping the same temperature for 170s, strips are naturally cooled to the normal temperature in the slow cooling process. Afterward, strips enter into the zinc pot through the elephant's trunk and begin in the hot-dip coating process. The optimum temperature range of the plating coat is 630º C~660º C. Coated with aluminium-zinc alloy, strips enter into the cooling tower by the steady roll and air knife. After fast cooled with wind or water, they are directly produced into Al-Zn armor plates. The general rate of cooling is 30º C/s or so, and strips are cooled to about 60º C.
| Chemical Requiremetns for structure steel |
| Composition, %-Heat Analysis Element, maximum, unless otherwise Shown |
| Designation |
C |
Mn |
P |
S |
Cu |
Ni |
Cr |
Mo |
V |
Cb |
TiA |
NB |
| G230 |
0.20 |
1.35 |
0.04 |
0.04 |
0.25 |
0.20 |
0.15 |
0.06 |
0.008 |
0.008 |
0.025 |
^ |
| G255 |
0.20 |
1.35 |
0.10 |
0.04 |
0.25 |
0.20 |
0.15 |
0.06 |
0.008 |
0.008 |
0.025 |
^ |
| G275 |
0.25 |
1.35 |
0.10 |
0.04 |
0.25 |
0.20 |
0.15 |
0.06 |
0.008 |
0.008 |
0.025 |
^ |
| G340 |
0.25 |
1.35 |
0.20 |
0.04 |
0.25 |
0.20 |
0.15 |
0.06 |
0.008 |
0.008 |
0.025 |
^ |
| G550 |
0.20 |
1.35 |
0.04 |
0.04 |
0.25 |
0.20 |
0.15 |
0.06 |
0.008 |
0.015 |
0.025 |
^ |
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