What is the classification of chromium steel, there are 12cr, 40cr and chromium

1. 15cr、20cr、30cr、35cr、40cr、45cr、50cr；

2.The difference in their chemical composition is that the carbon content is different, and the chemical composition is the same;

The carbon content of 15cr is;

The carbon content of 20cr is;

The carbon content of 30cr is;

The carbon content of 35cr is;

The carbon content of 40cr is;

The carbon content of 50cr is;

3.They can be distinguished by physicochemical analysis;

4.As the carbon content increases, its hardness and strength increase, and the most commonly used are 20cr and 40cr;

In addition to 12cr and 40cr, chromium steel also has:

12crmo, 20crmo, 35crmo, 1cr5mo, 1cr12mo, etc.

Chromium steel has high oxidation and corrosion resistance. For different use environments, other elements such as molybdenum, vanadium, tungsten, titanium, niobium, boron and other elements are often added. Commonly used application areas and steel grades are 12CrMo (high and medium pressure steam pipes), 20CrMo (blades), 35CrMo (long-term use parts below 650), 1Cr5Mo (reheaters below 650, petrochemical equipment with strong corrosion below 550), 1Cr12Mo (blades below 450).

Summary. Difference between Chromium 12 and Chromium 40: A: Chromium 40 is more chromium than Chromium 12 and Chromium 28. The equation is 40-12=28, which shows that chromium 40 surpasses chromium 12 in terms of bluntness, safety factor and stability.

Difference between Chromium 12 and Chromium 40: A: Chromium 40 is more than Chromium 12 than Chromium 28. The column equation is 40-12=28, which shows that chromium 40 is more than chromium 12 in terms of bluntness, safety factor and stability.

40CR is a medium carbon alloy steel with medium strength in mechanical properties and lower hardness than CR12. It is often used in structural parts. CR12 is a high-carbon alloy hidden steel, in addition to strength, hardness, wear resistance is better than 4OCR, and dimensional stability is also better than 40CR.

The main processing tools, mold raid search tool stove Zen source, measuring tools.

Dear, hello, it is a pleasure to serve you, what is the difference between 20 chromium and 20 chromium-molybdenum these two kinds of steel, for your reply is 20crmoti, the specific explanation of Chinese (read) 20 chromium-molybdenum titanium. Chemical Composition: C:

mn: si: cr:

TI: Bearings and gears welded together: brazing.

20 chromium-molybdenum is a chromium-molybdenum alloy steel with carbon content, low hardness, low strength, good comprehensive mechanical properties, and is used for low-stress structural parts, as well as non-standard shape parts with low stress by cutting and forging blanks through sawing machines. The chemical composition of steel is different: 20 chromium molybdenum contains a certain amount of the precious metal molybdenum.

20 chromium-manganese-titanium contains a certain content of metal manganese and titanium elements. nancyjinwei20 chromium-molybdenum steel plate is made of chromium-molybdenum alloy steel, which can reach a certain hardness, and can also get better toughness than wax, while high-carbon steel can reach a certain hardness, but the higher the hardness, the more brittle, for example, the wrench may fall to the ground, and the chrome wheel slag molybdenum alloy steel will not have this problem. It is a kind of material in steel, and the beam is large.

It is a high-quality carbon steel plate. A large number of mold production companies will use it to make abrasive steel. Chemical composition refers to the amount of carbon in this material, which is about the same level.

This material, compared with other excellent carbon steel, is also more common. The average carbon content of 20 steel is, and the average silicon content is.

What type of steel is the chromium content to.

Hello dear, the steel with the chromium content is a chromium to the steel. Chromium steel refers to alloy steel containing chromium, which can increase the hardenability of steel and improve the strength and wear resistance of steel. But chromium steels also have a tendency to overheat and develop tempered brittleness.

Chromium steel is prone to white spots after forging, and the carbon concentration of the surface layer of low-carbon chromium steel after carburizing is higher and more brittle. It is a good carburizing steel, containing chromium can increase the hardenability of the steel, reduce the deformation during quenching, and help improve the strength of the carburized core without reducing the impact toughness. The cold deformation of steel has high plasticity and good weldability.

The machinability is best in the old annealed state of socks.

Stainless steel is divided into: martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and precipitation hardening stainless steel.

1. Ferritic stainless steel.

Chromium content 15% 30%. Its corrosion resistance, toughness and weldability improve with the increase of chromium content, and the chloride stress corrosion resistance is better than that of other types of stainless steel, which belong to this category of CRL7, CR17MO2TI, CR25, CR25MO3TI, CR28, etc.

Because of its high chromium content, ferritic stainless steel has good corrosion resistance and oxidation resistance, and is easy to roll but has poor mechanical properties and process properties, so it is mostly used for acid-resistant structures with little force and oxidation-resistant steel.

This kind of steel can resist the corrosion of atmosphere, nitric acid and brine solution, and has the characteristics of good oxidation resistance at high temperature and small thermal expansion coefficient, etc., and is used for nitric acid and food factory equipment, and can also make parts that work at high temperatures, such as gas turbine parts.

2. Austenitic stainless steel.

The chromium content is greater than 18%, and it also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good comprehensive performance and can resist corrosion of a variety of media. This type of steel contains a large amount of Ni and Cr, which gives the steel an austenite state at room temperature.

This kind of steel has good plasticity, toughness, weldability, corrosion resistance and non-magnetic or weak magnetism, and has good corrosion resistance in oxidizing and reducing media, and is used to make acid-resistant equipment.

3. Austenitic-ferritic duplex stainless steel.

It combines the advantages of austenitic and ferritic stainless steels with superplasticity. Stainless steel, which has an austenitic and ferritic structure, accounts for about half each. In the case of low C content, the CR content is 18% to 28%, and the Ni content is 3% to 10%.

Some steels also contain sock elimination elements such as mo, cu, si, nb, ti, n and so on.

Compared with ferrite, this kind of steel has the characteristics of austenitic and ferritic stainless steel, higher plasticity, toughness, no brittleness at room temperature, significant improvement in intergranular corrosion resistance and welding performance, and also maintains the 475 brittleness and high thermal conductivity of ferritic stainless steel, and has the characteristics of superplasticity. Duplex stainless steel has excellent resistance to potting and corrosion, and it is also a nickel-saving stainless steel.

Chrome. Steel with chromium content is chromium steel. Chromium steel refers to the alloy leakage steel containing chromium in the return shirt, which can increase the hardenability of the steel and improve the strength and wear resistance of the steel. However, chromium steels also have a tendency to overheat and slip lead and develop tempered brittleness.

The chromium content is in the steel chromium steel.

20cr belongs to the low-alloy steel in the alloy structural steel.

Dear, hello, I'm glad to answer for you ()20cr belongs to the low alloy steel in alloy structural steelAnswer: Dear 20cr is an alloy material, and 20cr is a low hardenability carburizing steel. This kind of steel is mostly used to make carburized parts with high core strength requirements, surface wear and tear, cross-section below 30 mm, or shape shed abrasion and low load, such as:

Machine tool gearbox beats gears, gear shafts, cams, worms, piston pins, claw bases and clutches, etc.; For parts with small heat treatment deformation and high wear resistance, high-frequency surface quenching should be carried out after carburizing, such as gears, shafts, spline shafts, etc. with a module less than 3.