What is the material of 30CrNi3 and its mechanical properties

30CrNi3 alloy structural steel30CrNi3 Features:30CrNi3 steel is a quenched and tempered steel type of CR-Ni alloy structural steel, which has excellent hardenability, high strength and toughness, and has good comprehensive mechanical properties after quenching and low temperature tempering or high temperature tempering. 30CrNi3 steel has good machinability, but low plasticity and poor weldability during cold deformation, and has white spot sensitivity and tempering brittleness, so it is generally used in the quenched and tempered state.

30CrNi3 Executive Standard:gb/t 3077-2015

30CrNi3 Chemical Composition:Carbon C:;

Silicon SI:; Manganese mn:;

Sulfur S: permissible residual content;

Phosphorus P: permissible residual content;

Chromium cr:; Nickel Ni:;

Copper Cu: permissible residual content.

30CrNi3 mechanical properties:Tensile Strength b (MPa): 980;

Yield strength s (mpa): 785;

Elongation after fracture δ5 ( 9;

Section shrinkage 45;

Impact power AKV (J): 63;

Impact toughness value kv (j cm2): 78;

Hardness: 241HB;

Specimen size: The specimen blank size is 25mm.

30CrNi3 Applications:It is used to make automobile direction shafts, front axles, transmission shafts, crankshafts, gears, worms, etc., which are subject to high torsional and impact loads and require hardenability, and can also be used as shafts, connecting rods, keys, bolts, nuts, etc.

30CrNi3 Main Specifications:30CrNi3 round bar, 30CrNi3 rolling bar, 30CrNi3 forging bar, 30CrNi3 forging, 30CrNi3 plate, 30CrNi3 forging ring, 30CrNi3 pipe.

What are the main indicators of the mechanical properties of stainless steel should be the mechanical properties or mechanical properties of the material. The basic mechanical properties refer to the unidirectional tensile and compressive properties of the material, including the material constants of the material such as the yield limit, strength limit, Young's modulus, Poisson's ratio, elongation, etc. Of course, there are other mechanical properties, such as the durability limit of the material in terms of fatigue, impact toughness, etc.

30CrNi3 alloy structural steel, the steel has excellent hardenability, high strength and toughness, and has good comprehensive force properties after quenching.

Chemical composition. Carbon C:;

Silicon si:manganese mn:

Sulfur S: permissible residual content;

Phosphorus P: permissible residual content;

Chromium Cr: Nickel Ni:

Copper Cu: permissible residual content.

Mechanical properties. Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 (%9

Section shrinkage 45;

Impact power AKV (J): 63;

Impact toughness value kv (j cm2): 78(8)hardness: 241hb

Use. It is used to make automobile direction shafts, front axles, transmission shafts, crankshafts, gears, worms, etc., which are subject to high torsional and impact loads and require hardenability, and can also be used as shafts, connecting rods, keys, bolts, nuts, etc.

40crmn, 40crni, both of these are fine. Slightly worse ones can be used for 40crIt depends on what you're using for it, and then choose the right material.

1. Alloy steel with high strength and good chemical properties of CR30 at high temperature.

It includes two types of oxidation-resistant steels (or high-temperature non-peeling steels) and heat-strong steels. Oxidation-resistant steels generally require rot properties, but are subject to lower loads. Thermally strong steels require high high-temperature strength and corresponding oxidation resistance.

2. Heat-resistant steel is often used in the manufacture of boilers, steam turbines, dynamic and positive machinery lifting ears, industrial furnaces, petrochemical and other industrial sectors that work at high temperatures. In addition to high-temperature strength and resistance to high-temperature oxidation and corrosion, these parts also require sufficient toughness, good machinability and weldability, as well as a certain degree of organization, depending on the application. In addition, a number of new low-chromium-nickel have been developed.

Antioxidant steel grade.

37CrNi3 alloy structural steel37CrNi3 Features:37CrNi3 steel is a kind of high hardenability quenched and tempered steel, belonging to the Cr-Ni alloy structural steel, with high toughness, high hardenability, oil cooling can completely quench 150mm parts, creep resistance is stable at 450, low temperature impact toughness is good, tempering in the range of 450 550 has the second type of tempering brittleness, the formation of white spots tends to be larger. Due to the good hardenability, 37CrNi3 steel must be normalized and tempered at high temperature to reduce the hardness and improve the machinability.

37CRNi3 Executive Standard:gb/t 3077-2015

37CrNi3 Chemical Composition:Carbon C:;

Silicon SI:; Manganese mn:;

Sulfur S: permissible residual content;

Phosphorus P: permissible residual content;

Chromium cr:; Nickel Ni:;

Copper Cu: permissible residual content.

37CrNi3 mechanical properties:Tensile Strength b (MPa): 1130;

Yield strength s (mpa): 980;

Elongation δ5 ( 10;

Section shrinkage 50;

Impact power AKV (j): 47;

Impact toughness value kv (j cm2): 59;

Hardness: 269HB;

Specimen size: The specimen blank size is 25mm.

37CrNi3 Main Specifications:37CrNi3 round bar, 37CrNi3 rolling bar, 37CrNi3 forging bar, 37CrNi3 forging, 37CrNi3 plate, 37CrNi3 forging ring, 37CrNi3 tube.

[Specimen blank size].

25mm [heat treatment].

Coolant: water, oil.

Mechanical Properties] Tensile Strength ( b MPa): 1130

Yield point ( s mpa): 980

Elongation after fracture (δ5%)10

Section shrinkage 50;

Work of impact absorption (aku2 j): 47

Brinell hardness (HBS100 3000) (annealed or tempered at high temperature): 269<>

12CrNi3 material is good.

Shanghai Lijia Special Steel ****12CrNi3 round steel is now 12CrNi3 alloy structural steel.

Special Steel: 12CrNi3

Standard: GB T 3077-1988

Features and scope of application:

It is a high-grade carburizing steel with a wide range of uses, and its strength, plasticity and hardenability are higher than that of 15cr and 20cr steel. It is mainly used to make spindles that require high strength, high hardness and high toughness under heavy load conditions, shafts and rods that require high central toughness or bear impact load, surface wear resistance, and small heat treatment deformation, as well as various transmission gears, adjusting screws and camshafts that work under high speed and impact load.

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur S: permissible residual content;

Phosphorus P: permissible residual content;

Chromium Cr: Nickel Ni:

Copper Cu: permissible residual content.

Mechanical Properties: Tensile Strength B (MPa): 930(95)Yield Strength S (MPa): 685(70)Elongation δ5 (11.)

Section shrinkage 50;

Impact power AKV (J): 71

Impact toughness value kv (j cm2): 88(9)hardness: 217hb

Specimen size: The specimen blank size is 15mm

Heat treatment specifications and metallographic structure:

Heat treatment specification: quenching: 860 for the first time, 780 for the second time, oil cooling; Temper 200, water-cooled, air-cooled.

12CrNi3 and 20CrNimo are two different materials, there is no good or bad, it depends on the actual industrial and mining.

12CrNi3 belongs to the national standard high-grade carburizing steel, and the implementation standard: GB T 3077-2015

Compared with 15Cr and 20Cr steels, 12CrNi3 has high strength, plasticity and hardenability. It is mainly used to make spindles that require high strength, high hardness and high toughness under heavy load conditions, shafts and rods that require high central toughness or bear impact load, surface wear resistance, and small heat treatment deformation, as well as various transmission gears, adjusting screws and camshafts that work under high speed and impact load.

The chemical composition of 12CrNi3 is shown in the following figure:

20CRNIMO belongs to the national standard alloy structural steel, which is not similar to stainless steel, and the executive standard: GB T 3077-2015

20CrNIMO steel is originally the steel number 8620 in the American AISI and SAE standards. The hardenability is similar to that of 20crni steel. Although the Ni content in the steel is half of that of 20CrNi steel, the upper part of the austenite isothermal transition curve is shifted to the right due to the addition of a small amount of Mo. Due to the appropriate increase of MN content, the hardenability of this steel is still very good, and the strength is higher than that of 20CrNi steel.

It is commonly used in the manufacture of gears in the engine and transmission system of small and medium-sized cars and tractors; It can also replace 12CrNi3 steel to manufacture carburized parts and cyanide parts that require high core performance, such as the claws and cone bodies of cone bits used in oil drilling and metallurgical open-pit mines. 20crnimo contains molybdenum, in addition to having good comprehensive properties, it can also withstand a certain temperature. It is used in the manufacture of steam turbine gears, rotors, internal combustion engines, connecting rods, and valve cross-section forgings.

The chemical composition of 20crnimo is shown below

CR stands for alloy steel pipe.

CR alloy steel pipe is characterized by a hollow cross-section, and is often used as a pipeline for transporting oil, natural gas, gas, water and some solid materials. It is widely used in the manufacture of oil drill pipes, automobile transmission shafts, etc. Compared with solid steel such as round bars, the 30cr alloy pipe is light in weight when it has the same bending and torsional strength.

34CrNi3Mo is a high-strength alloy structural steel, which is widely used as a large-scale steam turbine forging low-pressure rotor steel, which has good comprehensive mechanical properties and process properties, and has been widely used in the production of engine rotors and steam turbine impellers.

Standard: JB T6396-2006 (replacement JB T6396-1992) Characteristics and applications: 34CrNi3Mo is a high-strength alloy structural steel, which is widely used in the whole forging of low-pressure rotor steel for large steam turbines, with good comprehensive mechanical properties and process properties, and has been widely used in the production of engine rotors and steam turbine impellers.

The properties and uses of steel are similar to those of 30Cr2Ni2Mo. The welding performance of the material is poor, and it is prone to cold cracks after welding.

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Phosphorus p: sulfur s:

Chromium Cr: Nickel Ni:

Molybdenum mo:copper cu:

High-strength materials, stable heat treatment properties, and small changes with temperature mechanical properties

Tensile Strength B (MPa): Quenched and tempered, 755 900Yield Strength MPa): Quenched and tempered, 590 785Elongation δ5 (% Quenched and tempered, 12 14

Section shrinkage quenched and tempered, 32 40 impact toughness value ku (j cm2): quenched and tempered, 32 55 hardness: 241 341

Specimen orientation: longitudinal.

34CrNi3Mo is an alloy steel material, not stainless steel

Introduction to 34crni3mo34CrNi3Mo is a high-strength alloy structural steel, which is widely used as a large-scale steam turbine forging low-pressure rotor steel, which has good comprehensive mechanical properties and process properties, and has been widely used in the production of engine rotors and steam turbine impellers. High-strength material, stable heat treatment performance, and little change with temperature.

The properties and uses of steel are similar to those of 30Cr2Ni2Mo. The welding performance of the material is poor, and it is prone to cold cracks after welding.

34CrNi3Mo standardJB T6396-2006 (replaces JB T6396-1992).34CrNi3Mo chemical compositionCarbon C:;

Silicon si:manganese mn:

Phosphorus p: sulfur s:

Chromium Cr: Nickel Ni:

Molybdenum mo:copper cu:

34CrNi3Mo mechanical propertiesTensile Strength B (MPa): Quenched and tempered, 755 900Yield Strength MPa): Quenched and tempered, 590 785Elongation δ5 (%.)

Quenched and tempered, 12-14

Section shrinkage quenched and tempered, 32 40 impact toughness value ku (j cm2): quenched and tempered, 32 55 hardness: 241 341

Specimen orientation: longitudinal.

, 34CrNi3Mo alloy steel.

Standard: JB T6396-2006 (replacement JB T6396-1992) Characteristics and applications: 34CrNi3Mo is a high-strength alloy structural steel, which is widely used in the whole forging of low-pressure rotor steel for large steam turbines, with good comprehensive mechanical properties and process properties, and has been widely used in the production of engine rotors and steam turbine impellers.

The properties and uses of steel are similar to those of 30Cr2Ni2Mo. The welding performance of the material is poor, and it is prone to cold cracks after welding.

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Phosphorus p: sulfur s:

Chromium Cr: Nickel Ni:

Molybdenum mo:copper cu:

High-strength materials, stable heat treatment properties, and small changes with temperature mechanical properties

Tensile Strength B (MPa): Quenched and tempered, 755 900Yield Strength MPa): Quenched and tempered, 590 785Elongation δ5 (% Quenched and tempered, 12 14

Section shrinkage quenched and tempered, 32 40 impact toughness value ku (j cm2): quenched and tempered, 32 55 hardness: 241 341