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Product Name: Dx51d Roof Galvalume Steel Coil Model NO.: SGCC, DX51D, A653, SGCH, Q235B, G550 Stock: Not Stock Edge: Mill Application: Building and Construction Technique: Cold Rolled Surface Treatment: Galvanized Certification: ISO Standard: ASTM, JIS, GB, AISI, DIN, BS Coating: Zinc Coated Thickness: 0.15-3.0mm Width: 600-1250mm Length: 600-1250mm Surface Finish: Regular Spangle Trade Mark: Dingang Approved Certificate: BV, SGS, ISO Grade: SGCC, Dx51d, A792, Sgch, Q235B,G550 Surface: Chromated ,Dry/Oiled, Anti-Finger Sample: Available Trademark: Dingang Transport Package: standard export packing Specification: JIS G3002, EN 10142 Origin: china HS Code: 72104900 Product Description 1. Profile of Galvalume steel coilThe plating coat of Aluminium-zinc alloy armor plate is Zn-Al alloy, and its composition is 55% Al, 43.3% Zn and 1.6% Si. The plate is of smooth surface and excellent corrosion resistance of the atmosphere, which is 2 to 6 times higher than hot-dip galvanized sheet of the same thickness of plating coat. 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 20~50ºC 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 630ºC~660ºC. 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 30ºC/s or so, and strips are cooled to about 60ºC.2.specifciation1. Production Grade: SGCC, DX51D, Q1952. Thickness: 0.18-1.5mm3. Width: 914mm, 1000mm, 1200mm, 1250mm mainly4. Coating Type: 55%Al,43.5%Zn and 1.5%Si5. Coating Thickness (both side, g/sqm): 50-1506. Surface Finish: Regular Spangle,Small Spangle7. Surface Treatment: Oring or Anti-finger print8. Inside diameters: 508mmOutside diameters: as per customers' requirements3. Chemial requirementsChemical Requiremetns for structure steelComposition, %-Heat Analysis Element, maximum, unless otherwise ShownDesignationCMnPSCuNiCrMoVCbTiANBG2300.201.350.040.040.250.200.150.060.0080.0080.025…G2550.201.350.100.040.250.200.150.060.0080.0080.025…G2750.251.350.100.040.250.200.150.060.0080.0080.025…G3400.251.350.200.040.250.200.150.060.0080.0080.025…G5500.201.350.040.040.250.200.150.060.0080.0150.025…4. Production lineWelcome contact us.
