Having a hollow section, no seams around the long bar of steel. The thicker the wall thickness of the product, it is more economical and practical decorative stainless steel pipe, stainless steel tube wall thickness is thinner, it will be a substantial increase in processing costs; the product of the process can determine its limitations, general low precision seamless steel pipe: uneven thickness, the tube looks low brightness, high cut-costs, as well as the appearance of pitting, and is difficult to remove the black spots inside; it's shaping to be off-line detection and treatment. So it reflects its superiority in high-pressure, high-intensity mechanical structure the timber. 304 stainless steel on the weight management formulas :( OD - Wall Thickness) × wall thickness × 0.02491 = weight per meter (kg) mechanical properties of yield strength (N / mm2) ≥205 ≥520 tensile elongation (%) ≥ 40 Hardness HB ≤187 HRB≤90 HV≤200 density 7.93 g · cm-3 specific heat c (20 ℃) ??0.502 J · (g · C) -1 Thermal conductivity λ / W (m · ℃) -1 (in The following temperature / ℃) 20 100 50012.1 16.3 21.4 linear expansion coefficient α / (10-6 / ℃) (among the following temperature / ℃) 20 ~ 10020 ~ 200 20 ~ 300 20 ~ 40016.0 16.8 17.5 18.1 resistivity of 0.73 Ω · mm2 · m-1 melting point of 1398 ~ 1420 ℃ 304 stainless steel pipe, stainless steel tube, Billion-commerce provided by Tianjin Bao Bao Jie Shengda Trading Company. Bao Jie Tianjin Shengda Trading Company (www.sdbjsm.com) strong, credible, in Tianjin's daily hardware industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengda treasure-commerce and you hand into the brilliant, for a better future!