What is the material of 13cr, what is the material of 12cr13

13Cr is a stainless steel with 13% Cr martensitic stainless steel.

Martensitic stainless steels are mainly low-carbon or high-carbon steels with a chromium content in the range of 12%-18%.

There are three types of martensitic stainless steel used in various countries:

1.Low carbon and medium carbon 13

CR steel. 2.High-carbon 18% CR steel.

3.Low-carbon 17% CR steel with nickel (about 2%).

Martensitic stainless steels have high strength and corrosion resistance, and can be used to make machine parts such as blades of steam turbines (1Cr13), shafts and tie rods of steam equipment (2Cr13), as well as parts working in corrosive media such as valves, bolts, etc. (4Cr13). The steel grade (4cr cr18) with a higher carbon content is suitable for the manufacture of medical devices, table knives, measuring utensils, springs, etc.

13Cr is a stainless steel with 13% Cr martensitic stainless steel.

Martensitic stainless steel:

Stainless steel, whose mechanical properties can be adjusted through heat treatment, is a class of stainless steel that can be hardened in layman's terms. Typical grades are CR13 type, such as 2Cr13, 3Cr13, 4Cr13, etc. After quenching, the hardness is high, and different tempering temperatures have different combinations of strength and toughness, which are mainly used for steam turbine blades, tableware, and surgical instruments.

According to the difference in chemical composition, martensitic stainless steel can be divided into two categories: martensitic chromium steel and martensitic chromium-nickel steel. According to the different structure and strengthening mechanism, it can also be divided into martensitic stainless steel, martensitic and semi-austenitic (or semi-martensitic) precipitation hardening stainless steel and martensitic aging stainless steel.

Refers to a type of stainless steel.

Due to the difference in chemical composition between the two, their corrosion resistance is different, ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid steel.

It is generally stainless steel. The term "stainless steel" does not simply refer to one type of stainless steel, but to more than a hundred industrial stainless steels, each developed with good performance in its specific application area. The key to success is to first understand the use and then determine the right steel grade.

Historical origins. The invention and use of stainless steel can be traced back to World War I.

Period. British scientist Henry Braerley was commissioned by the British ** military arsenal to study the improvement work of **. At that time, the rifles used by soldiers were extremely worn-out, and Breerley wanted to invent an alloy steel that would not wear easily.

Brearley's invention of stainless steel was patented in the United Kingdom in 1916.

And began mass production, so far, the stainless steel found by chance from the garbage heap has taken the world by storm, and Henry Brelley is also known as the "father of stainless steel". During the First World War, British guns on the battlefield were always shipped back to the rear due to worn breeches. The military production department ordered Brearley to develop high-strength wear-resistant alloy steel to study and solve the problem of wear and tear in the chamber of the gun.

13Cr indicates martensitic stainless steel with 13% Cr.

Martensitic stainless steels are mainly low-carbon or high-carbon steels with a chromium content in the range of 12%-18%. There are three types of martensitic stainless steel widely used in various countries:

1.Low-carbon and medium-carbon 13% CR steel.

2.High-carbon 18% CR steel.

3.Low-carbon 17% CR steel with nickel (about 2%).

Neither 13Cr nor Cr13 belong to stainless steel (GB T20878-2007), the former does not match the chromium and the latter does not match the carbon. 13Cr may be a low-alloy high-strength steel (at 3% of the total alloy) or a carburized steel (GB T221-2008). CR13 is an alloy tool steel (GB T221-2008).

It is martensitic steel equivalent to 410 and has a certain anti-rust effect.

12Cr13 is a martensitic heat-resistant steel.

12Cr13 is nickel-free stainless steel, martensitic stainless steel, and has good hardenability. Due to its high strength and relatively light weight, stainless steel absorbs less energy than other metal materials and has good safety performance, especially after being impacted.

Ferritic high-strength cast steel is mainly used in nuclear power plant steam turbines, with good toughness, high temperature thermal strength.

12Cr13 is a kind of martensitic heat-resistant steel, which is a product of Fencola die steel in the United States, the main components are carbon, silicon, sulfur, phosphorus, etc., with high strength, toughness, good corrosion resistance and machinability.

After quenching and tempering, it has high strength, toughness, good corrosion resistance and machinability. It is mainly used for parts that require high toughness, certain stainless steel and withstand shock loads.

Such as cutting tools, blades, fasteners, hydraulic valves, pyrolysis anti-sulfur corrosion equipment, etc., can also be made of equipment and components that are resistant to weak corrosive media at room temperature.

30Cr13 is made of stainless steel. 30Cr13 stainless steel "cutting edge grade" martensitic steel, similar to Brinell high chromium steel, the earliest stainless steel. 30cr13 has a certain wear resistance and corrosion resistance, high hardness, and its ** is a lower class of stainless steel balls, which is suitable for the working environment of stainless steel general requirements.

30Cr13 stainless steel is suitable for all kinds of precision machinery, bearings, electrical, equipment, instruments, meters, transportation, household appliances, etc. It is mostly used in the manufacture of parts that are resistant to atmospheric, water vapor, water and oxidizing acids.

Physicochemical Properties:Density g cm3:.

Melting temperature: 1365.

Anti-sunning and anti-corrosion properties.

30Cr13 steel has stable resistance to yangization below 750. 30cr13 steel has a certain corrosion resistance in dilute acid and weak organic acid at room temperature, but it is not as good as 10cr13 and 20cr13.

Introduction of 3Cr13 steel.

China 30Cr13 (3Cr13 steel) is a martensitic stainless steel, which has good machinability. After heat treatment (quenching and tempering), it has excellent corrosion resistance and high polishing strength and wear resistance. After quenching and tempering, when the hardness is below HRC30, the 3Cr13 material has good machinability and is easy to achieve good surface quality, when the hardness is greater than HRC30, the surface is ***, but the tool is easy to wear.

Compared with 1Cr13 (12Cr13) and 2Cr13 steels, 3Cr13 stainless steel has higher strength, hardness, and higher hardenability. It has certain corrosion resistance in dilute nitric acid and weak organic acids at room temperature, but it is not as good as 1Cr13 and 2Cr13.

30Cr13 = 3Cr13 Stainless Steel Grade:

30 (or 3) Average carbon content: 30 10000 (, old name: 3 1000

CR chromium.

13 Average chromium content: 13%.

Mechanical properties. It is used for hot-rolled steel bars after quenching and tempering.

Tensile strength: 735 n mm2

Conditional yield strength: 540 n mm2

Elongation: 12%.

Area reduction rate: 40%.

Impact energy: 24 J

Hardness: HBW: 217 (quenched and tempered); 235 (annealed).

HV: 247 (after annealing).

HRC: 48-53 (quenched and tempered).

Note: The data is for steel diameters (d) less than or equal to 75mm.

1 n mm2 = 1 megapascal.

After annealing of cold-rolled steel plate and steel strip.

Compressive strength: 225 MPa

Tensile strength: 540 MPa

Elongation: 18%.

Hardness: Weight: 235

Heart rate: 99

High pressure: 247

Physical. Density g cm3:.

Melting Point: 1365

Specific heat capacity (j kg·k): 170 at 0-100

Thermal conductivity (w m·k):

Coefficient of linear thermal expansion (10 -6 k):

Resistivity ( m): at 20

Longitudinal modulus of elasticity (kn mm2): 219 at 20

Typical heat treatment.

for rebar. Annealing: 800 900 (slow cooling).

Quenching: 920-980 (oil cooled).

Tempering: 600 750 quick cooling).

Used for steel plates and steel strips.

Annealing: approx. 750 (fast cooling) or 800-900 (slow cooling).

Quenching: 980 1040 (quenching).

Tempering: 150 400 air-cooled).

Apply. 3Cr13 steel is mainly used for high-strength parts, as well as wear parts that are subjected to high stress loads and certain corrosive media, such as tools and springs working below 300; Shafts, bolts, nozzles, valves, seats, and bearings operate below 400 °C.

30CR13 belongs to the national standard martensitic stainless steel, and the implementation standard: GB T 1220-2007

30CR13 Performance characteristics:

After quenching, it has higher strength, hardness and hardenability than 12cr13 and 20cr13 steel. It has some corrosiveness to dilute nitric acid and weak organic acids indoors, but does not involve 12cr13 and 20cr13 steel.

Use of 30cr13:

It is mainly used for high-strength components, as well as wear parts that are subjected to high stress loads and work in certain corrosive media. For example, knives and springs working below 300, shafts, bolts, valves, bearings, etc. working below 400 are also used as measuring instruments and medical tools.

30cr13 chemical composition:

2CR13 (20CR13) belongs to the national standard martensitic stainless steel, and the executive standard: GB T 1221-2007

2Cr13 (20Cr13) is a stainless steel whose mechanical properties can be adjusted by heat treatment, with high hardness and good corrosion resistance in the quenched state. It is often used as steel for steam turbine blades, tableware, and surgical instruments.

2Cr13 (20Cr13) welding consumables can be selected:

1.G202 and G207 are selected for atmospheric corrosion resistance, which need to be preheated at 150-300 degrees and tempered at 700-730 degrees after welding;

2.Organic acid resistance and heat resistance: G211, preheating 150-300 degrees required;

3.Good plasticity: A102, A107, A202, A207, A302, A307, repair welding preheating, thick and large parts preheating.

The chemical composition of 2Cr13 (20Cr13) is shown below

The mechanical properties of 2Cr13 (20Cr13) are as follows:

Tensile Strength B (MPa): Quenched and tempered, 635

Conditional yield strength MPA): quenched tempered, 440

Elongation δ5 (% quenched tempered, 20

Section shrinkage quenching and tempering, 50

Impact work aku2(j): quenching and tempering, 63

Hardness: annealed, 223HB; Quenching and tempering, > 192HB

2Cr13 is made of stainless steel.

It belongs to martensitic stainless iron, which is characterized by good hardness and magnetism, high hardness and good corrosion resistance in the quenched state. In the process of forging and making, chromium is added to 2Cr13, which is more heat-resistant, corrosion-resistant and acid-resistant than ordinary stainless steel electrodes. This type of steel is suitable for making parts or appliances that work in neutral or weak corrosive environments, such as scalpels, surgical shears, steam turbine blades, stainless steel nuts, etc.

In addition, it also has relatively strong toughness, is not easy to break, and will return to the same old even if it undergoes more bending and bending. After quenching, the hardness will be greatly enhanced, generally the quenching temperature of 2cr13 is 980 1050, and it is often used in the production of parts of industrial machines.

7Cr13 belongs to martensitic stainless steel, which has high strength and hardness, low plasticity, and is very practical as a material for knives.

Martensitic stainless steel is a type of stainless steel that can adjust its mechanical properties through heat treatment, and in layman's terms, it is a type of stainless steel that can be hardened.

Main components: chromium, manganese, silicon, iron, carbon, etc.

Good wear resistance and corrosion resistance, low shrinkage, good elongation, can be sprayed with thick coating, used for piston rods, hydraulic plungers, sealing sleeves, crankshafts, etc. It is ideal for making knives, stabs, etc.

Standard martensitic stainless steels are (SE A, 440B, and 440C types, magnetic; The corrosion resistance of these steels comes from "chromium", which ranges from up to 18%, the higher the chromium content, the higher the carbon content to ensure the formation of martensitic during heat treatment, the above three types of 440 stainless steels are rarely considered as applications that require welding, and the melt metal of the type 440 component is not readily available.

The modification of standard martensitic steel, which contains added elements such as nickel, molybdenum, vanadium, etc., is mainly used to increase the limited allowable operating temperature of standard steel to more than 1100K, and when these elements are added, the carbon content also increases, and as the carbon content increases, the problem of avoiding cracking in the hardening heat-affected zone of the weld becomes more serious.