2Cr13 Hardware Tool Steel Sheet

2Cr13 steel is a commonly used stainless steel with high thermal strength, oxidation resistance and good shock absorption. It has good corrosion resistance in weakly corrosive media, and has sufficient corrosion resistance to fresh water, sea water, steam, and air. Higher performance can be obtained after heat treatment.

 It is commonly used to manufacture mechanical parts that work below 450°C and containers used in the chemical and food industries at room temperature. For example, transmission parts, fixed pins, tie rods, turbine blades, valve seats, valve plates, valve stems, pump parts, molds, etc. Among them, transmission parts, fixed pins, tie rods and other parts are generally used and tempered after quenching. The traditional quenching and tempering process is high temperature heating, oil quenching, and then tempering.

Critical temperature of 2Cr13 steel: AC1 820℃, AC3 950℃, Ar1 780℃. The quenching and tempering process recommended by the new national standard is: quenching 920～980℃ oil cooling, 600～750℃ tempering fast cooling. The tempering process recommended by the old standard is: 1000～1050℃ oil cooling or water cooling, 660～770℃ tempering, oil cooling or water cooling or air cooling.

The quenching and tempering process of the general factory is: 950～1000℃ oil quenching, 640～700℃ tempering air cooling. In the quenching and tempering process recommended by the old and new standards, the quenching temperature is different. Production practice shows that quenching at 1050°C sometimes causes overheating to make the martensite coarse, and the impact toughness decreases significantly after tempering. It is generally believed that tempering of 2Cr13 steel at 400～600℃ after quenching will reduce its corrosion resistance and impact value. The use of higher temperature tempering can ensure stable structure and performance at the use temperature, and at the same time have higher corrosion resistance. 

For the cooling after tempering, some people think that any cooling rate can be used. Some people think that steel has a tendency to temper brittleness, and it should be cooled quickly after tempering to inhibit the development of temper brittleness and obtain higher impact toughness. Some people think that any cooling rate can be used. Some people think that steel has a tendency to temper brittleness, and it should be cooled quickly after tempering to inhibit the development of temper brittleness and obtain higher impact toughness. Some people think that any cooling rate can be used. 

Some people think that steel has a tendency to temper brittleness, and it should be cooled quickly after tempering to inhibit the development of temper brittleness and obtain higher impact toughness.

Features:

High hardness quenching, corrosion resistance is good. Used as a turbine blade. 2Cr13 density of 7.75g / cm3 2Cr13 quenching hardness: 2Cr13 quenching temperature of 980 ~ 1050 ℃, taking 980 ℃ heating oil quenching hardness is significantly lower than 1050 ℃ heating oil quenching, 980 ℃ oil quenching hardness of 45 ~ 50HRC , 1050 ℃ after oil quenching hardness 2HRC. However, 1050 ℃ after quenching the resulting coarse grains, large brittleness. It is recommended to use 1000 ℃ heating quenching can get better organization and hardness.

2Cr13 martensitic stainless steel, welded to preheat. And Q235 welding austenitic stainless steel electrode without preheating, such as A302.A307 are OK. Control welding seam dilution rate, not swing welding, using a smaller current.

Chemical Composition:

2Cr13 Application:

1. Anti-atmospheric corrosion selected G202, G207, need to preheat 150-300 degrees, tempering after welding 700-730 degrees;
2. Resistance to organic acids and heat-resistant election: G211, need to preheat 150-300 degrees;
3. Good plasticity: A102, A107, A202, A207, A302, A307, repair welding preheating, thick preheating.

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