Stainless Steel Definition And Classification

1.Definition of stainless steel?

A high-alloy steel that can resist corrosion in air or chemically corrosive media. Stainless steel has a beautiful surface and good corrosion resistance. It does not need to undergo surface treatment such as color plating, and can play the inherent characteristics of stainless steel. surface properties.

2. Classification of stainless steel?

Stainless steel can be roughly classified according to use, chemical composition and metallographic structure.

(1) The austenitic steel is basically composed of 18% chromium-8% nickel, and the addition of each element varies, and the steel for various purposes is developed. Classification by chemical composition:

①.CR series: ferrite series, martensite series;

②.CR-NI series: austenite series, abnormal series, precipitation hardening series.

(2) Classification by metallographic structure:

①. Austenitic stainless steel

②. Ferritic stainless steel

③. Martensitic stainless steel

④. Duplex stainless steel

⑤. Precipitation hardening stainless steel.