Liaocheng Shunxiang Building Materials Co., Ltd. (www.lcsxjc.com) located in Liaocheng City, Shandong Province Development Zone Industrial Park, Contact: Manager Ge Building Material Co., Ltd. mainly produces Liaocheng Shunxiang variety of milling of cast iron pipes 35 # no pipe joints density, ductile iron pipe, flexible cast iron pipe fittings, cast iron pit wells and other premium quality of our products. Elongation (σ) in the tensile test, the specimen fractured gauge length of the increased percentage of the original gauge length of seamless steel tubes under pressure, called elongation. With σ expressed in units of%. The formula is: where: L1 - specimen fractured gauge length, mm; L0 - the original specimen gauge length, mm. Building Materials Co., Ltd. mainly produces Liaocheng Shunxiang variety of milling of cast iron, ductile iron water pipe 35 # seamless steel pipe brand, flexible cast iron pipe fittings seamless steel tubes, high-quality cast iron pit wells quality of our products. sss adoption of advanced foreign technology to produce seamless cold-rolled production equipment, high precision mill, producing a wide range of flexible specifications, more advanced than the average automatic cold rolling units, and configure advanced automation and control systems and on-line quality inspection system . Ensure the stability of product quality and reliability.