630 stainless steel rust-proof supply of imported cold rolled material classification ① to "stainless steel / sheet" for the raw material, at room temperature by cold rolling mill rolling timber. Conventional thickness, width; ② ["cold-rolled strip / coil"] has a smooth surface, high flatness, dimensional accuracy and good mechanical properties, etc., products are mostly in rolls, can be processed into coated steel; ③ cold-rolled stainless steel strip / roll production process: ⒈ pickling → ⒉ normal lubrication of rolling → ⒊ process → ⒋ annealing → ⒌ flat → ⒍ fine cut → ⒎ packaging → ⒏ reach customers. Hot-rolled hot rolled mechanism ① thickness 1.80mm-6.00mm, width 50mm-1200mm strip. ② [hot rolled strip / sheet] with low hardness, easily processed, and good ductility. ③ hot-rolled stainless steel strip / coil production process: ⒈ pickling → ⒉ high temperature lubrication of rolling → ⒊ process → ⒋ annealing → ⒌ flat → ⒍ fine cut → ⒎ packaging → ⒏ reach customers. ① difference between hot and cold rolled steel strength, yield ratio, good hot-rolled steel ductility, toughness. ② thickness of thin cold-rolled strip, hot rolled greater thickness. ③ cold-rolled strip surface quality, appearance, dimensional accuracy is superior to the hot-rolled sheet. Correlation between physical properties and temperature (1) the specific heat capacity with temperature change to change the heat capacity will be, but the temperature change in the process of a metal structure in the event of a phase change or precipitation, the heat capacity will be a significant change in ratio. (2) the thermal conductivity below 600 ℃, the thermal conductivity of stainless steel is substantially within 10 ~ 30W / (m · ℃) range, as the temperature of the thermal conductivity increased with increasing trend. At 100 ℃, the thermal conductivity of stainless steel from large to small order 1Cr17,00Cr12,2 Cr 25N, 0 Cr 18Ni11Ti, 0 Cr 18 Ni 9,0 Cr 17 Ni 12Mο2,2 Cr 25Ni20.500 ℃ when the thermal conductivity by a large to a small order of 1 Cr 13,1 Cr 17,2 Cr 25N, 0 Cr 17Ni12Mο2,0 Cr 18Ni9Ti and 2 Cr 25Ni20. Thermal conductivity of austenitic stainless steel is slightly lower than the other, compared with ordinary carbon steel, 100 ℃, the thermal conductivity of austenitic stainless steel is about its quarter. (3) linear expansion coefficient in the range of 100-900 ℃, linear expansion coefficient of various types of stainless steel grades of the basic 10ˉ6 ~ 130 * 10ˉ6 ℃ ˉ1, and with increasing temperature showed an increasing trend. For the precipitation hardening stainless steel, the size of the linear expansion coefficient to determine the aging treatment temperature. (4) resistivity 0 ~ 900 ℃, all kinds of stainless steel grades than the resistance of the size of the basic 70 * 10ˉ6 ~ 130 * 10ˉ6Ω · m, and with the increase of temperature tends to increase. When used as heating material, low resistivity material should be used. (5) the magnetic permeability of the magnetic permeability of the austenitic stainless steel is extremely small, it is also known as non-magnetic material. Organization with a stable austenitic steels, such as 0 Cr 20 Ni 10,0 Cr 25 Ni 20 and so on, even if its more than 80% of the large deformation process will not take magnetism. Further carbon, nitrogen, high manganese austenitic stainless steels such as 1Cr17Mn6NiSN, 1Cr18Mn8Ni5N series and high-manganese austenitic stainless steel, and a large reduction in the processing conditions can occur ε-phase transformation, thus keeping the non-magnetic. At temperatures above the Curie point, even the magnetic material will lose magnetism. However, some austenitic stainless steel such as 1Cr17Ni7,0Cr18Ni9, because of its organization as a metastable austenite structure, thus making a large reduction occurs when cold or low temperature processing martensitic transformation, magnetic and magneto itself conductivity will increase. (6) the elastic modulus at room temperature ferritic stainless steel longitudinal elastic modulus of 200kN / mm2, longitudinal elastic modulus of austenitic stainless steel is 193 kN / mm2, slightly lower than carbon steel.