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ASTM Standards Prime Galvalume Steel Sheet Coils

Galvalume steel is alu-zinc coated steel,it can be made in coils,sheets or strips,according to customers’ requirement.It can be anti-fingers or common one,without anti-fingers.
MOQ requirement:15tons
Thickness range:0.2 ~ 1.2mm
  • 600-1250mm

  • Yumi steel

  • 72104900

ASTM standards prime galvalume steel sheet coils

1.Have you ever been through steel coils was rusty after shipment?

Yumi steel has one Guatemalan customer,we have worked together for 2 times.But there was quality problem happened.Because water ran into the containers,it caused oxidized rusty phenomenon.It was regularly oxidized and rusty.


For this claim,we dealt with it as following steps:

1)Asked customer to contact local insurance company and made inspection,to ask insurance company to make claims for customer;

2)We applied for paying part of manual repair costs to customer;

3)We promised best price for next order;

4)The most import thing we did is to improve our packing and container loading to avoid same problem happened.The protection way is as follows:


☆  One layer of Mildew paper and one layer of moisture-proof kraft paper to protect the steel coils.

☆  One 3.5cm thick kraft paper loops inside,and connected with mildew paper and of moisture-proof kraft paper to make sure the steel coils are well protected.

☆ Then again one layer of steel sheet on the surface and tighted with steel strips.

 When loading,we put mildewproof bags in the container.

5)Finally customer received steel coils in good status,and happy to see what we did for them.


2.Whats galvalume steel?


Galvalume steel is also called aluminum and zinc coated steel as substrate.It’s solidified by 55% aluminum,43.4% zinc and 1.6% silicon at 600 ℃. Comparing with galvanized steel,the rust prevention performance is much more better.

3.Galvalume steel sheet in coil specs:



CGCC, DX51D, Q235, Q345, ASTM 792/792M

Alu-zinc coating:

30 ~ 180 g/m⊃2;

Thickness range:

0.20 ~ 1.20 mm

Coil width range:

600 ~ 1250 mm

Coil ID:

508 / 610 mm

Coil weight:

3 ~ 8 tons

Surface treament:

Anti-finger printing, Chromated, oiled/non-oiled


Normal, hard, full hard


4.Production site video:


For more details,please check our production site video,thank you.

5.Steel coil quality control:




We strictly make steel coil measurement and test as follows:

☆ Coating content and thickness measurement

☆ Hardness testing:pencil hardness,scratch hardness

 Flexibility testing:impact,shaft bends,T bend,cup drawing, stretch

☆  Adhesion test

 Degree of curing test:glass transition test, solvent resistance test, the dry heat test

☆ Other performance testing:

pressure spot test

baking test

stain resistance test

chemical resistance test

abrasion test


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