Due to the extremely small magnetic permeability of Sch40 ASTM A53 Steel Hot Dipped Gi Pipe, it is also called non-magnetic material by the industry. This is because it has a stable austenitic structure in its structure. Even if it undergoes a certain large deformation processing, the material itself will not be magnetic, and the material itself will occur when cold working or low temperature working is carried out under large pressure. Martensitic transformation, but its magnetic properties and permeability will also increase.
The ferritic Sch40 ASTM A53 Steel Hot Dipped Gi Pipe with high chromium content has a low density, and the austenitic Sch40 ASTM A53 Steel Hot Dipped Gi Pipe with high nickel content and high manganese content has a relatively high density. The effect of high temperature, because the fret spacing increases, resulting in a decrease in density. The physical properties of Sch40 ASTM A53 Steel Hot Dipped Gi Pipe at low temperature are as follows:
1. Thermal conductivity
Different types of stainless steel have different thermal conductivity at very low temperatures, but in general, its thermal conductivity is about 1/50. At low temperatures, the thermal conductivity increases as the magnetic flux density increases.
2. Specific heat capacity
Under the low temperature state, the specific heat capacity of stainless steel is different. Generally speaking, the specific heat capacity will be greatly affected by the temperature. When the specific heat capacity is at 4K, the specific heat capacity will be reduced, and even lower than 1/100 of the room temperature.
3. Thermal expansion
The shrinkage rate of austenitic stainless steel below 80k is different, especially the nickel content in its structure has a great influence on the shrinkage rate.
4. Resistivity
Under low temperature conditions, the resistivity of each Sch40 ASTM A53 Steel Hot Dipped Gi Pipe is very different, and the alloying element has a great influence on the resistivity.