Nowadays, Aluminum window and door hardware has been the important part in window and door hardware business. But many customers are worried about choosing the bad hardware. Because using the bad window and door hardware, the profile will be out of shape because the sunshine, air and rain. Sometimes it even will fall off and burst when it becomes seriousness. The expert shows 3 points to help customers keep away from the bad hardware.
  First, oxide film thickness.
  It can’t less than 10 micrometer in the country building profile oxide film thickness standard. Because if the thickness is not enough, the profile will be etched and rusted. Some factories only keep the oxide film thickness in 2 to 4 micrometer, because if decrease one micrometer oxide film, they will save several hundred money.

 Second, the chemical composition is unqualified.
  The costs can be decreased with putting more abandon aluminum, but it also will decrease the chemical composition, it even will threat to the building’s safe.
  Third, lower the profile’s wall thickness.
  90 sliding window’s wall thickness can not less than 1.4mm in country’s standard. But there are many windows’wall thickness only in 0.6mm to 0.7mm in the market.
  The factories want to decrease their costs, so they use the bad materials to make products. But they don’t think about the customers, so they will be defeated because of their bad hardware.