Liaocheng Jinghua Pipe Co., Ltd. specializes in the production of seamless steel pipe material specifications, reasonable price, timely delivery. Resistant metallic material hardness index indentation capacity hard objects surface, called the hardness. Depending on the test methods and scope, it can be divided into Brinell hardness, Rockwell hardness, Vickers hardness, Shore hardness, micro hardness and high temperature hardness. For pipe commonly used are Brinell, Rockwell, Vickers hardness of three. Liaocheng Jinghua Pipe Co., Ltd. specializes in the production of various materials specifications of seamless steel tubes, seamless steel pipe plant in Hangzhou, reasonable price, timely delivery. The yield point (σsu): sample undergoes a maximum yield and stress before the first drop; lower yield point (σsl): When excluding the initial transient effects, the yield phase of the minimum stress. Yield point is calculated as follows: Where: Fs-- process of tensile yield strength (constant), N (Newton) So-- original specimen cross-sectional area, mm2. Brinell hardness Jinghua Steel Pipe Liaocheng given more accurate and reliable, seamless steel pipe plant in Yulin, but generally only applies HBS 450N / mm2 (MPa) below the metal material, the harder the steel or thin plate does not apply. In the steel standards, Brinell hardness most widely used and often indentation diameter d to represent the hardness of the material, both intuitive and easy. Precision seamless alternative to the traditional boring machining inner outer peel process, not only reduce costs, but also reduce the two machining processes, improve processing efficiency, Nantong seamless steel pipe plant, thereby increasing the efficiency. Quality all meet the national standard, widely used in automobiles, electric power, petrochemical, shipbuilding, aerospace, bearings, pneumatic components, fuel tanks, boiler equipment, medical equipment, fitness equipment, tractors, seamless steel pipe plant, motorcycle, reinforced connecting sleeve, cylinder tube, machinery manufacturing and other industries seamless steel pipe plant in Nantong Jinghua Pipe (online consultation), seamless steel pipe plant in Liaocheng City Jinghua Steel Pipe Co. by. Liaocheng Jinghua Steel Pipe Co., Ltd. (www.sdwfgc.com) Shandong Liaocheng, steel leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Pipe leadership in Beijing with the staff warmly welcome all inquiries negotiations to create a better future for Jinghua pipe.