We usually see the type of stainless steel is a lot of kinds of materials, stainless steel tanks are also used a lot of different materials, stainless steel barrels main manifestation is not the same. The most common stainless steel is austenitic stainless steel. Austenitic stainless steel for use in stainless steel casks is relatively more. Compared to austenitic stainless steel and carbon steel, there are many benefits. This is because the distribution of the molecule inside its own is not the same, which in itself is a high electric female ratio. At the same temperature, the expansion coefficient of austenitic stainless steel is large, substantially as large as forty percent than carbon steel, but its expansion coefficient according to temperature changes or varies, as long as the temperature of the high coefficient of expansion is higher. In this case the expansion coefficient of austenitic stainless steel is necessary a lot larger. The thermal conductivity, the thermal conductivity of austenitic stainless steel is very low, about one-third of carbon steel. So its insulation effect is quite good. Stainless steel barrels austenitic material because of its comprehensive performance is better than steel. Austenitic stainless steel tensile strength, yield strength and hardness will increase with decreasing temperature and, when in use as long as it is possible to ensure the normal working temperature within its appropriate range.