Aluminum-plastic composite board problem Multi-aluminum-plastic composite panel inspection pass rate of 63.3%, sampling sites are mainly Taihua Road building materials market, Daejeon Building Materials City, Daming Palace building materials market, Sunjiawan Plate City, home building materials market and other building materials wholesale market.
The spot check results showed that in order to reduce costs, production enterprises of substandard products used aluminum sheets and inferior plastic sandwich materials that could not reach the thickness requirements. If such plates are used in construction and renovation, they are prone to breakage and deformation. The surface toughness of some plates and the firmness of the surface coating are not enough. After being impacted by the external impact, the surface will produce the phenomenon of coating shedding, cracks, etc., and will not achieve the original decorative effect of the aluminum-plastic composite plate.
The failure rate of unqualified steel bars is 68%. The main unqualified items are size, mechanical properties and bending properties. In the project construction, the products that do not meet the standard size will not meet the expected results in the construction design requirements, thus causing potential safety hazards. However, when consumers use such products whose mechanical properties and bending properties do not meet the national standards, quality accidents are likely to occur in construction projects, such as the collapse of buildings and the breakage of bridges. Some steel mills still use the ground steel that has been explicitly eliminated by the country as raw materials for processing and production. For the above unqualified products, the law enforcement department of the Shenzhen Municipal Quality Supervision Bureau has ordered the distributors to stop the sales and rectify the deadline.
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The product range of Hongchuang hardware fasteners includes hexagon head screws, full thread and half thread hexagon socket head cap screws, hexagon wood screws, hexagon socket head cap screws, full thread and half thread hexagon socket countersunk head screws, hexagon socket head flange screws, set screws, etc. We provide products conforming to DIN, ANSI and JIS standards.
Stainless steel of grade 304 contains nickel of 8% and chromium of 18% and is the most commonly used grade for the production of fasteners. It possesses an excellent combination of strength, corrosion resistance and fabricability. Fasteners of this grade are being extensively used today in almost every industry.
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