Physical Properties Of Stainless Steel ANSI B18.2.1 Bolts

　　Comparing the physical property data onto stainless steel and carbon steel, the density of carbon steel is slightly higher than that of ferrite and martensitic stainless steel, and slightly lower than that of austenitic stainless steel; the resistivity is carbon steel, ferrite type, martensite type. The order for austenitic stainless steel is increasing; the order for the linear expansion coefficient is similar, the austenitic stainless steel is the highest and the carbon steel is the smallest; the carbon steel, ferritic and martensitic stainless steel are magnetic, and the austenitic stainless steel is non-magnetic. However, when it is cold-worked hard to form a phase transformation, magnetism will be generated, and the martensite structure can be removed by heat treatment to restore its non-magnetic property. Compared with carbon steel, austenitic stainless steel has the following characteristics:

　　1) High electricity rate, about 5 times that of carbon steel.

　　2) The large coefficient of linear expansion is 40% larger than that of carbon steel, and as the temperature increases, the value of the coefficient of linear expansion of stainless steel ANSI B18.2.1 bolts increases accordingly.

　　3) Low thermal conductivity, about 1/3 of carbon steel.