What is the difference between the new standard and the old standard of 304 Seamless Stainless Steel Pipe?
Today, stainless steel pipe manufacturers will introduce the difference between the new standard and the old standard of stainless steel seamless pipes. Customers inquire about 304 stainless steel seamless pipes. Some manufacturers report the old standard, and some manufacturers report the new standard. The price difference of several hundred makes customers one end Fog water, in fact, the old standard is GB/T14976-2002, and the new standard is GB/T14976-2012.
Their production process manufacturing methods and testing standards are the same. The quality surface, wall thickness deviation, and mechanical properties of stainless steel seamless steel pipes are the same. The main difference is that the chemical composition of the material is different, the main element is chromium, the old standard is 17% chromium, and the new standard is 18% chromium.
This is formulated by the General Administration of Quality Supervision, Inspection, and Quarantine of the People’s Republic of China according to the WTO international standard and the American ASTMA959-09-A312 standard. Because after China’s accession to the WTO, product quality must meet international standards. The performance is basically the same. The corrosion resistance of the new standard 304 will be slightly higher. The price of the new standard is 200 yuan/ton higher than the old standard. It is recommended that customers buy the new standard 304 stainless steel seamless pipe.