Metal materials should be marked with the steel number, furnace number, and batch number, and accompanied by certificates of chemical composition and mechanical properties. 2. Before pressure-bearing materials are stored, a sample inspection should be conducted, with chemical composition sampled by melting furnace sequence and mechanical properties sampled by heat treatment batch. The test results should comply with the specifications of the corresponding material standards. 3. If a sample's mechanical property fails in the pressure-bearing material's sample inspection, a double amount of samples should be retested. If another sample fails, the batch of parts should be reheat treated, following the previous retest method, with no more than two reheat treatments (excluding tempering times). If another sample fails in the subsequent retest, the batch material cannot be used. Supply Q980 high-strength square pipes, Q980 high-strength square tubes. Specialize in weather-resistant steel from major domestic steel mills, Q355GNH weather-resistant square tubes, Q295GNH square pipes, Q345GNH square tubes, 09CuPCrNi-A Corten tubes, 09CuPCrNi-B Corten steel tubes, Q345B large-diameter square pipes, weather-resistant steel plates, Q235NH weather-resistant steel plates, Q355NH weather-resistant steel plates, Q355GNH weather-resistant steel tubes, ND steel tubes, atmospheric corrosion-resistant steel, dew point-resistant steel, Corten steel, steel, boiler container plates. Resources are abundant, prices are reasonable, and good partner business relationships have been established with major steel mills. Selling various Q355GNH weather-resistant steel tubes, Q355GNH weather-resistant square tubes, Q345NH weather-resistant steel plates, and other products, the company has established a variety of service systems and formed a sales network covering North China, South China, and even the whole country. With good reputation, products, strong strength, and low prices, the company serves the whole nation. Weather-resistant square tubes, Corten steel tubes, and weather-resistant steel tubes have protective rust layers that resist atmospheric corrosion and can be used to manufacture low-alloy structural steels for vehicles, bridges, towers, containers, and other steel structures. Compared to carbon steel, weather-resistant steel has excellent corrosion resistance in the atmosphere. Compared to stainless steel, weather-resistant steel contains only trace alloy elements such as phosphorus, copper, chromium, nickel, molybdenum, niobium, vanadium, and titanium, with the total amount of alloy elements accounting for only a few percent, unlike stainless steel which contains up to 10-15%. Therefore, the price is relatively low. Since its establishment, the company has been building its reputation on honesty and integrity, adhering to the business philosophy of "technology as the source, customers as the core, cooperation as the priority, and win-win as the goal." The company strictly manages its operations, strengthens product quality, and produces products with unique advantages. To expand the business scope and provide better service to customers, the company has specially opened door-to-door delivery services and has dedicated vehicles and personnel to pick up negotiation personnel for business orders. Since its establishment, the company has always adhered to the business philosophy of "honest cooperation and common development," and has consistently sold 40cr alloy tubes, 42crMo alloy tubes, 20crmnti alloy tubes, 35crmo alloy tubes, 4340 alloy tubes, seamless tubes, hot-rolled seamless steel tubes, hot-expanded seamless steel tubes, Q345B seamless steel tubes, q345b steel tubes, cold-drawn seamless steel tubes, Q345B seamless tubes, 16MN seamless tubes, etc. produced by several major manufacturers. The company follows the principles of honest operation, genuine goods, and quality service, winning customers, expanding the market, and establishing a wide sales network. The company seeks reputation through quality, development through reputation, and gains the trust of new and old customers with strong strength, products, and low prices. Welcome to call or visit for guidance. Product materials: 10#, 35#, 45#, 20G, 16Mn (Q345), 27siMn, etc. Product names: Seamless steel tubes, general structural tubes, fluid conveying tubes, low and medium pressure boiler tubes, fertilizer tubes, petroleum cracking tubes, ship tubes, hydraulic support tubes. Implementation standards: GB/T8162-2008, GB/T8163-2008, GB3087-2008, GB5310-2008, GB6479-2000, GB9948-2006, GB5312-2008. Alloy tube materials: 12CrMoV, 15CrMo, Cr5Mo, 10CrMo910, A335P11, T91, P91 The company will serve a wide range of customers with good reputation, strong strength, products, and low-cost services. The general manager is willing to work with new and old customers to make great achievements. Business philosophy: "Compare quality for the same product, compare reputation for the same service." Unwavering development is a characteristic of the tube industry. Welcome new and old customers to come and discuss business.