Chen chain force more stringent testing process, divided into hardness testing and tensile testing. Hardness testing mainly after heat treatment, a sample of the chain sling lifting chain, hardness detected by the hardness tester, hardness herein refers to a Rockwell hardness. The hardness of the link arm section is 36-40 degrees lifting chain specification, R Department (arc position) hardness of 40-46 degrees, if the hardness of failure, you need to adjust the heat treatment process immediately. If the hardness is qualified, it needs to be tensile testing. Rally test is destructive pull test that is the chain pull off with Rally facie breaking force and elongation values, the chain length of the test is 5 or 7 ring ring ring, taken with different specifications are not the same. If the failure is immediately process adjustment. Chain at the factory, but also the need for workers to pull a whole and the entire testing, workers pulling force of 2.5 times the rated load of the lifting chain supply, so the maximum to ensure the overall quality of the chain. Qualified products are surface treated lifting chain, for black and galvanized chain, after the surface treatment is completed, but also the need for random testing. All testing qualified, then allow the factory, the unqualified re-sampled. This high-intensity lifting chain chain corrosion resistance, and can be adapted to a higher or lower temperature environment. The main application areas of high-intensity lifting chain is food manufacturing and processing industry, chemical industry and pharmaceutical manufacturing industries. Self-lubricating chains, manufactured by such metal chain with wear, corrosion resistance, and the ability to complete the self-lubricating, maintenance-free, more convenient, longer working life. Self-lubricating chain more suitable for high wear and not easy to maintain applications, such as food automated production lines. Rubber chain, manufacturing method is outside the ordinary chain link plus U-shaped plate is attached, will be attached to various rubber plate attached from the outside. High strength chain is a special roller chain, is to improve the shape of the link plates of the original chain, based on the chain plate, chain plate hole and pin made of special treatment. High strength chain has good tensile strength, 15% to 30% higher than the average chain tensile strength and good impact resistance and fatigue resistance. Lifting chain Supply | Lifting chain manufacturer (Online) | Lifting chain sling from Hebei chen Manufacturing Limited. Hebei chen sling Manufacturing Co., Ltd. (www.qzhon.com) Hebei Baoding, forestry machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chen led force in a sling with the staff warmly welcome all inquiries negotiations to create chen sling a better future.