Stainless steel fastener knowledge

Stainless steel definition
Stainless steel is generally referred to as the resistance to air, water, acid, alkali salt or other corrosive medium of steel. According to the different composition of the alloy, respectively, focusing on the stainless steel and acid resistance. Some steels are stainless, but not acid, and acid - resistant steels are usually stainless steel.
Classification of stainless steel
1, according to the organization structure: austenitic stainless steel, martensitic stainless steel, ferritic stainless steel, duplex stainless steel;
2, according to the main chemical composition of steel: chromium stainless steel, chromium nickel stainless steel, chromium nickel molybdenum stainless steel, ultra low carbon stainless steel. (for the production of fasteners mainly austenitic stainless steel, in people's daily life, often referred to the stainless steel is also austenitic stainless steel)
The characteristics of steels and austenitic stainless steel
No magnetism under normal condition, cold working after a slight magnetic; at various temperatures, can maintain the Oslo field organization, no phase change, so you can't use heat treatment to harden. However, the application of cold for processing, can make its hardening, and increase the strength of.