ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

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Structure of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

  ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

Description of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing
Prepainted Rolled steel Coil is a kind of coated steel coil/sheet. With the cold rolled steel of different strength and thickness as substrate, it is produced through applying Al-Zn coat on both faces by hot dip process. In its coating, Al accounts for about 55%, Si 1.6%, while the remaining is Zn. Aluminum zinc coils enjoys both the physical protective feature and durability of Al and the electrochemical protective property of Zn. And its surface has bright silver color and regular embossed-like figure, which are highly decorative. 

ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

Main Feature of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

1.Corrosion resistance: It mainly depends on the aluminum protection. When the zinc being worn, the aluminum will  form a dense layer of aluminum oxide, resist corrosion material to prevent further corrosion inside. 
2. Heat resistance: Aluminum zinc alloy steel sheet has excellent heat resistance, can withstand high temperatures over 300 centigrade, and is similar with aluminized steel high temperature oxidation resistance. It often used in chimney pipes, ovens, fluorescent lighting device and the device cover. 
3. Heat reflective: Galvanized steel plate heat-reflective high rate is twice as galvanized steel, often used to make insulation materials. 
4. Economy: Because density of 55% AL-Zn is smaller than the density of Zn, so in the same weight and thickness of Galvanized zinc layer, aluminum-zinc steel plate is larger area more than 3% of galvanized steel sheet. 

Applications of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing
1. Construction and building: roofing; ventilating duct; handrail; partition panel;etc.

2. Electric appliance: refrigerator; washing machine; refrigerator; DVD;etc.

3.Transportation: oil tank; road sign; etc.
4.Agriculture:barn; etc.

5.Others:vending machine; game machine; etc.  

 ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing


Specifications of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing 


Prepainted Rolled steel Coil for Construction Roofing

Material Grade

SGCC / SGCH  / DX51D+AZ, etc






Thickness: +/-0.02mm , Width:+/-2mm




Raw material: Hot rolled steel coil --> Cold rolled_>hot dipped galvalume


Dried, Chromated, Unoiled


Regular spangle , small spangle, zero spangle



Coil weight

25MT max

Export package

Cardboard inner sleeves, Waterproof paper, galvanized steel covered and steel strip packed

 FAQ of ASTM Z70 Prepainted Rolled Steel Coil for Construction Roofing

We have organized several common questions for our clients,may help you sincerely:

1. What is the minimum order quantity ? 

Our MOQ is 50mt for each color. And we could give more discount if you make big order like 1000 tons and more. Further more, the more appropriate payment term your can  offer the better price we can provide.

2. How long can we receive the product after purchasing?

Usually within thirty working days after received buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15- 25 days, but the shipment will depend on the vessel situation.

3. How to guarantee the quality of the products?

We have established the international advanced quality management system ,every link from raw material to final product we have strict quality test;We resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.



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Q:Does anyone know anything about Kodiak Steel Homes?
Steel framing replaces all the wood making the house stronger and resistant to termites. Costs about $2,000 more per house and there is a lack of trained framers in most cities. Never heard of Kodiak brand. Do you know a city where they are located?
Q:Can I soften the steel on steel toe boots?
No chance
Q:How can you stain iron/steel MECHANICALLY?
Funny! 100!
Q:Ways to damage steel?
Your best bet would be a grinding wheel attached to a small electric motor. Even if you slipped, your skin is too soft to be cut by the dull wheel. Steel, however, is easily cut. But perhaps you don't have access to electricity or pressurized air to run such a tool. In that case, a simple file would work well, though you'd be somewhat more likely to injure yourself. If you had no tools, but access to whatever chemicals you wanted, you could try a weak acid. This would take a long time, and require constant scrubbing to bring fresh acid into the pits in the metal, but it would eventually eat through the collar.
Q:Mag. Wheel (steel and aluminum info)?
Negative facts for steel wheels: (1) Not as many style choices as aluminum. (2) Rust easily even when painted or powder coated, due to rock chips. (3) Heaver than aluminum, as far as fuel economy. Negative facts for aluminum wheels: (1) More sensitive to proper torquing of lug nuts. IE torque must be checked more often. (2) Susceptible to impact damage from road hazards much more than steel. (3) Need constant attention to prevent oxidation. Are these what you are looking for? I hope so. Wingman
Q:Why buy recycled steel?
Where you buy all your steel. The recycled and new steel are indistinguishable from each other. You won't recognize the one from the other. Same thing with glass. A certain percentage must be used glass, to enhance the quality of the total batch. Peace.
Q:Question about the strength if steel?
There are many types of steel some very rigid, while you can have steel that is very flexible. The type of katana: steel is for Samurai swords
Q:wii? red steel?
Have you tried Zelda or Trauma Center? Those should give you a good ride for your money. If you have a few bucks lying around pick either of them up.
Q:what is the similarity beetween ironn and steel?
1. Both victim of corrosion
Q:how to forge damascus steel?
hand made folding knife English tip, blade of Damascus metallic sort Rose, 2,5mm thickness, no liners, teja spring embellished by using metallic report and billet surrounded of chrome metallic. A Damascus blade knife is characterised by using a wavy, mottled visual allure on the blade that’s led to by using the approach used to shape the metallic. the technique of transforming into Damascus metallic is derived from a centuries-previous forging technique used to create blades that grew to become very just about mythical of their attractiveness for power and sharpness it exchange into reported a Damascus knife ought to shrink with the aid of a rifle barrel to boot as with the aid of a hair falling on the blade.

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