(1) Component index: The chemical composition of angle steel belongs to the series of rolled steel for general structure. The main verification indicators are C, Mn, P and S. Depending on the grade, the content varies, and the approximate range is C<0.22%, Mn: 0.30-0.65%, P<0.060%, and S<0.060%.
(2) Inspection method: When testing the above chemical components, the commonly used standard inspection methods are GB223, JISG1211-1215, BS1837, BS manual 19, ГОСТ22536 and so on.
Door Stops , Door Holders, Door Guards, Door Chains , Door Bolts , Door Coordinator, door viewers, etc are always required for whatever wooden or metal doors. We have been manufacturing a very big range of such small hardware accessories. The best seller is the half-round stopper in both stainless steel and zinc alloy. There could be of course, some accessories not shown in our web pages, as we have not updated every single product there.
Should you have any further demands, please feel free to contact us any time. And welcome for OEM products with detailed technical drawings.
Door Stops,Door Holders,Door Guards,Door Chains
Greatwall Hardware International Limited , http://www.greatwall-hardware.com