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Distinguish between heat resistant steel good tips!

by:BoQiao Machinery     2021-01-19
Distinguish between heat resistant steel good tips! Most of chromium manganese nitrogen, Ni7N, 2520 is our daily common heat resistant steel. Home, heat resistant steel varieties ( Steel grade) In more than 100, and the elements in the steel grade and content of different, its performance and value are also quite different. Identification of heat resistant steel, therefore, we must seriously study and understand steel grade, with comprehensive test method can correctly identify. Heat resistant steel corrosion resistance, acid, high temperature resistance, abrasion resistance, etc. Heat resistant steel in the steel industry, machinery industry a common high alloy steel. Distinguish between heat resistant steel good tips! At present, our identification of heat resistant steel mainly has the following several ways: 1. Identify import or steel mill order of heat resistant steel, typically require according to import or steel mill certificate of quality, check the logo on the steel or packaging. General heat resistant steel manufacturers in the production process in the furnace will be carried out in laboratory, the content of each element will be supplemented in order. 2, the difference between chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel three categories, the identification method is as follows: 【 Colour and lustre is the identification of 】 After acid pickling of stainless steel, the surface color is bright and clean, chromium nickel stainless steel colour silvery white jade, Chromium stainless steel color white slightly grey lustre weak; The colour and lustre of chromium manganese nitrogen stainless steel is similar to chromium nickel stainless steel is a bit pale. Without pickling of stainless steel surface color: brown and white chrome-nickel steel, chrome steel, brown and black chromium manganese nitrogen in black ( This three kinds of colour and lustre is refers to the oxidation of the heavier color) 。 Without annealing cold-rolled stainless steel, chromium nickel surface is reflective. With magnet can identify the basic difference between two kinds of stainless steel. Because of the chromium stainless steel in any state can be a magnet to attract; Chromium nickel stainless steel in annealing state is generally no magnetic, after cold working, some become magnetic. But the high manganese content in the high manganese steel is non-magnetic; Chromium nickel nitrogen stainless steel magnetic situation is more complicated: some nonmagnetic, some magnetic, some longitudinal surface nonmagnetic and horizontal surface magnetic. Therefore, a magnet can basic difference between nickel chromium and chromium stainless steel stainless steel, but can't distinguish between some special steel, more can't distinguish the specific steel grade. 【 With copper sulfate to identify 】 To remove the oxide layer on the steel, put a drop of water, with copper sulfate, brush, brush after such as, general stainless steel; If change, amaranth, nonmagnetic for high manganese steel, general for the common magnetic steel or low alloy steel. For the features of steel grade, we adopt the following three ways to identify. 【 Scratch the identification 】 Scratch the identification is grinding stainless steel on the polishing machine, view its spark. Such as spark a streamlined, and more dense flowers, is the high manganese content in the nitrogen or manganese steel, high manganese steel If there is no day flower is the chrome steel or chromium nickel stainless steel. The chemical composition of heat resistant steel product, its performance will be different. After confirmed with temperature, therefore, chooses the appropriate type of heat resistant steel is very important. '' '', this article comes from: nanjing foundry co. , LTD. Nanjing foundry co. , LTD is a highly market competitiveness of cast steel, cast iron, stainless steel castings and profile production base. More details, can online advice! Or dial the hotline: 020-86 22139325
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