What is the material list of steel 40MnB?

The above is very detailed.

The difference is in b boron, 40cr modified steel grade.

40MNB This is a new steel grade that is more successful in replacing 40CR steel, it has high strength, hardness, wear resistance and good toughness, its hardenability is slightly higher than that of 40CR, and the critical quenching diameter in oil is 18 33mm; After normalization, the machinability is good, the performance of cold drawing, wire rolling, tapping and forging, and heat treatment processes is also good, and the grain growth, oxidation, decarburization tendency and quenching deformation tendency are small at high temperature. However, it has tempering brittleness, and the tempering stability is slightly worse than that of 40cr steel.

These two materials are similar and interchangeable materials, but 40mnb is more hardenable.

It depends on the role of alloying elements Mn and Cr can improve strength, hardness and wear resistance, as well as reduce the critical cooling rate of steel, and improve the hardenability of steel, but Mn can improve the low-temperature toughness of steel, and Cr can improve the heat resistance of steel and make steel have corrosion resistance to corrosive media such as strong oxidizing acids That is, Mn is used in low temperature and CR is used in high temperature

It has a fine grain structure below 950 and has good toughness.

40Mnb has high strength, hardness, wear resistance and good toughness, and is a new steel grade that is more successful in replacing 40Cr steel. It is used as a steering arm, steering knuckle, steering shaft, half shaft, worm, spline shaft, brake adjustment arm, etc. on automobiles, and can also replace 40cr steel to make parts with larger sections.

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

Chromium Cr: Permissible residual content

Nickel Ni: Permissible residual content

Copper Cu: Permissible residual content

Boron b : Mechanical Properties:

Tensile Strength B (MPa): 980(100)Yield Strength S (MPa): 785(80)Elongation δ5 ( 10

Section shrinkage 45

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)hardness: 207hb

Specimen size: The specimen blank size is 25mm

40mn carbon structural steel.

It can be used in the normalized state, as well as in the quenched and tempered state. The cutting performance is good, the plasticity is medium during cold deformation, and the welding performance is poor. It is used to manufacture parts that are subjected to fatigue loads, such as shaft rolls and screws and nuts that work under high stress.

Hardenability is slightly higher than that of 40 steel. After heat treatment, strength. Hardness.

The toughness is slightly higher than that of 40 steel, the cold deformation plasticity is medium, the machinability is good, the weldability is low, it has overheating sensitivity and tempering brittleness, and it is easy to crack after water quenching. It is suitable for fatigue-resistant parts, crankshafts, rollers, shafts, connecting rods.

MNB belongs to alloy structural steel.

The characteristics of MNB: poor welding performance, good machinability, often used as quenching and tempering, improve strength.

3. Structural alloy steel, which is used as mechanical parts and various engineering components and contains one or several certain amounts of alloying elements.

35mnb belongs to alloy structural steel. The welding performance is poor, the machinability is good, and it is often used as a quenching and tempering to improve the strength.

35mnb belongs to low-alloy structural steel.

The composition of 35mnb material should be: carbon content, manganese content, silicon content, and boron content.

High-quality carbon structural steel. It is a steel for mechanical parts, which belongs to medium carbon steel.

35mn is a high-quality carbon structural steel, with higher strength and hardenability than 30mn, medium plasticity and good machinability during cold deformation, but poor weldability. It should be used after quenching and tempering. Suitable for hinges.

Bolt. Nut. screws, etc., mandrel.

Cogs. Standard: GB T 699-1999

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur s:

Phosphorus p:

Chromium cr:

Nickel ni:

Copper cu:

Mechanical Properties: Tensile Strength B (MPa): 560(57)Yield Strength S (MPa): 335(34)Elongation δ5 (%18.)

Section shrinkage 45

Impact power AKV (J): 55

Impact toughness value kv (j cm2): 69(7)Hardness: 229HB without heat treatment; Annealed steel 197HB

The strength and hardenability of 35mn steel plate are higher than those of 30mn, and the plasticity is medium and machinability is good during cold deformation, but the weldability is poor. It should be used after quenching and tempering. Suitable for hinges. Bolt. Nut. screws, etc., mandrel. Cogs.

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur s:

Phosphorus p:

Chromium cr:

Nickel ni:

Copper cu:

Mechanical Properties: Tensile Strength B (MPa): 560(57)Yield Strength S (MPa): 335(34)Elongation δ5 (%18.)

Section shrinkage 45

Impact power AKV (J): 55

Impact toughness value kv (j cm2): 69(7)Hardness: 229HB without heat treatment; Annealed steel 197HB specimen size: specimen size is 25mm

Heat treatment specifications and metallographic structure:

Heat Treatment Specification: Normalizing, 870; Quenching, 850; Tempering, 600.

Delivery Condition: Delivered in non-heat-treated or heat-treated (annealed, normalized or high-temperature tempered) condition. If the delivery is required in the state of heat treatment, it shall be indicated in the contract, and those who are not specified shall be delivered according to no heat treatment.

Summary. What does 40mnb mean 40mnb, alloy structural steel 40mnb.

High strength, hardness, wear resistance and good toughness are one.

Generation 40cr steel is a more successful new steel grade.

What is the difference between 35mnb and 40mnb.

MNB belongs to the characteristics of alloy structural steel MNB: poor welding performance, good machinability, and is often used as a QQ and Tempering to improve strength. 3. Structural alloy steel, which is used as a steel for mechanical parts and various engineering components and containing one or several certain alloying elements.

What does 40mnb mean 40mnb, alloy structural steel 40mnb has higher strength, hardness, wear resistance and good toughness than the first acre, and is a new steel grade that is more successful than 40cr steel.

In layman's terms, 35 welding is not as good as 40 welding.

40mnbh alloy structural steel.

40mnbh steel is a hardenable low-alloy structural steel.

40mnbh Chemical Composition:

Carbon C: Silicon Si:

Manganese mn:sulfur s:

Phosphorus P: Chromium Cr:

Nickel ni:

Copper cu:

Boron B:40mnbh Heat Treatment Specification and Metallographic Structure:

Heat treatment specification: normalizing, 880 900, air cooling; Quenching, 850 20, oil cooled; Tempered, 510 30, water-cooled.

40mnbh Delivery Status:

Delivered in rolled or forged condition. According to the requirements of the buyer, it can also be delivered in the condition of heat treatment (normalizing, annealing or high temperature tempering).

Mechanical properties of 40mnbh.

Impact toughness value kv (j cm2): 69(7)Hardness: annealed or tempered at high temperature, 207HB, indentation diameter Specimen size: The size of the specimen blank is 25mm

40crmn alloy structural steel.

Unified numerical code: A22402.

Standard: GB T 3077-1988

Chemical composition. Mass score (%)

Carbon C: Silicon Si:

Manganese Mn:Sulfur S: Allowable residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

Mechanical properties. Specimen blank size].

25mm heat treatment].

Quenching heating temperature ( ) 840; Coolant: Oil.

tempering heating temperature ( ) 550; Coolant: water, oil [mechanical properties].

Tensile Strength b (MPa): 980(100)Yield Strength S (MPa): 835(85)Elongation δ5 ( 9

Section shrinkage 45

Impact power AKV (J): 47

Impact toughness value kv (j cm2): 59(6)Brinell hardness (HBS100 3000) (annealed or high temperature tempered condition): 229Delivery Condition:

Delivered in heat-treated (normalized, annealed or high-temperature tempered) or without heat-treated, the delivery status should be indicated in the contract.

40crmn is a grade of alloy structural steel specified in the Chinese national standard.

Chemical composition. Carbon C:

Silicon si:manganese mn:

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

Chromium Cr: Nickel Ni: Permissible Residual Content

Copper Cu: Permissible residual content

ApplicationsManufacture of shafts and connecting rods of pumps under high-speed and high-bending load working conditions, gear pumps without impulse shock loads, water pump rotors, clutches, bolts for high-pressure vessel covers, etc.