The Difference between the New Standard and the Old Standard of 304 Stainless Steel Seamless Pipe

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, and the quality, surface, wall thickness, and mechanical properties of stainless steel seamless pipes are the same.

The difference is that the main element chromium in the chemical composition of the material is different. 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 PRC accordance to the WTO international standards and the American ASTM A959-09-A312 standard. This is because after China's accession to the WTO, product quality must meet international standards.

HCADTO Stainless Steel Co., Ltd. the Stainless Steel Division of ADTO GROUP, specializes in manufacturing stainless steel pipes, stainless steel angle bar, flat bar, round bar, square bar, hexagonal bar and channel bar in various grades and sizes. Our years of production experience and manufacturing facilities will ensure the good quality and competitive duration of our products.