How to classify stainless steel forgings?

(1) Classification by chemical elements:

Stainless steel forgings can be basically divided into: chromium stainless steel forgings (represented by Crl3), chromium nickel stainless steel forgings (represented by Crl8Ni8 steel), chromium nickel molybdenum stainless steel forgings, chromium nickel manganese stainless steel forgings, high nitrogen stainless steel forgings and high molybdenum stainless steel forgings.

(2) Classification by organization:

The metallurgical structure of stainless steel forgings is closely related to its chemical composition and heat treatment state, according to the stainless steel forgings heated to high temperature or from high temperature cooling to room temperature when there is no phase change and the main metallurgical structure at room temperature to be classified, there are martensitic stainless steel forgings, austenitic stainless steel forgings, ferritic stainless steel forgings and austenitic ferrite duplex stainless steel forgings.

(3) Classification according to the content of harmful impurity elements:

Stainless steel forgings can be divided into ordinary stainless steel, low-carbon stainless steel, ultra-low carbon stainless steel and high purity stainless steel according to the carbon content and harmful impurity element content in steel.

(4) Classification by corrosion resistance:

Stainless steel can be divided into stress corrosion-resistant stainless steel forgings, pitting corrosion-resistant stainless steel forgings and abrasive corrosion-resistant stainless steel forgings.

(5) According to the use of media environment classification:

According to the use of media and environment, stainless steel can be divided into nitric acid resistant stainless steel, sulfuric acid resistant stainless steel, urea resistant stainless steel and seawater resistant stainless steel.

(6) Classified by saving elements:

Due to the precious and rare of some elements, countries have studied and produced some steel according to the main element saving, such as nickel-free steel, nickel-free stainless steel and chrome-free stainless steel, such as Cr-Mn-N and Cr-Mn-Ni-N stainless steel, as well as silicon, aluminum instead of chromium steel.

(7) Classification by characteristic component elements:

Stainless steel forgings can be divided into high-silicon stainless steel, high-phase stainless steel forgings and high-nitrogen stainless steel forgings.

(8) Classification by functional characteristics:

According to the functional characteristics of stainless steel, it can be divided into low temperature and ultra-low temperature stainless steel forgings, non-magnetic stainless steel forgings, high strength stainless steel forgings, super plastic stainless steel forgings, free cutting stainless steel forgings and heat-resistant stainless steel forgings.