The difference between 45MN and 40mn materials

40mn carbon structural steel 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.

45mn medium carbon quenched and tempered steel, strength, toughness and hardenability are higher than 45 steel, after quenching and tempering treatment, good comprehensive mechanical properties can be obtained, cutting performance is good, but the welding performance is poor, cold deformation plasticity is low, there is a tendency to temper brittleness, generally used in the quenched and tempered state, can also be used in the quenching and tempering or normalizing state. It is used in the manufacture of worn parts, such as rotating shafts, mandrels, crankshafts, spline shafts, connecting rods, universal joint shafts, meshing rods, gears, clutch discs, bolts, nuts, etc. The most obvious difference is that the carbon content is different, so its properties are slightly different as above.

45mn carbon content: strength, toughness and hardenability are higher than 45 steel, quenching and tempering treatment can obtain better comprehensive mechanical properties, good machinability, but poor weldability, generally used for parts under large load and wear resistance working conditions, such as crankshafts, spline shafts, shafts, connecting rods, universal joint shafts, automobile half shafts, gears, clutch discs, bolts, nuts, etc.

The carbon content of 40mn can be used instead of 40cr after quenching and tempering, and is used to manufacture parts that work under fatigue loads, such as crankshafts, connecting rods, shafts and high-stress bolts, screws and nuts.

The most obvious difference between 45mn and 40mn material is that the carbon content is different, the content of other elements is the same, the carbon content directly affects the properties of the steel, the higher the carbon content, the higher the strength and hardness of the steel, and the lower the plasticity and toughness.

F45MNVS is a non-quenched and tempered mechanical structural steel (old grade YF45MNV, F45MNV) (L22478).

F45MNVS is a kind of alloy structural steel, which belongs to non-quenched and tempered mechanical structural steel, with high strength and high toughness, which is used to replace quenched and tempered steel, reduce process difficulty and other characteristics, and is often used in automobiles and construction machinery parts.

Executive standard: GB T 15712-2016

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Sulfur s: phosphorus p:

Vanadium v: chromium cr:

Nickel ni:

Copper cu:

Molybdenum mo:

Nitrogen n: Mechanical Properties: Tensile Strength B (MPa): 810Yield Strength S (MPa): 490

Elongation δ5 (%12

Section shrinkage 28

Impact power AKV (J): 25

Non-blended steel. f45mnvsBelongsNon-quenched and tempered mechanical structural steel is used to replace quenched and tempered steel and reduce process difficulty.

F45MNVS belongs to the national standard non-quenched and tempered mechanical structural steel, and the executive standard: GB T 15712-2016

F45MNVS is a kind of non-quenched and tempered steel, and the mechanical properties in the hot-rolled state or normalized state can meet the index requirements of quenched and tempered steel. It is used in auto parts, oil extraction, machinery manufacturing, mining machinery and civil machinery, etc. F45MNVS non-quenched and tempered steel has been widely used due to its excellent performance, high efficiency, energy saving, and environmental protection.

F45MN VS Chemical Composition:

Carbon C: Silicon Si:

Manganese mn:sulfur s:

Phosphorus p: vanadium v:

Chromium Cr: Nickel Ni:

Copper cu:

Molybdenum mo:

Nitrogen n:f45mnvs mechanical properties:

Tensile Strength b (MPa): 810

Yield strength s (mpa): 490

Elongation δ5 (%12

Section shrinkage 28

Impact power AKV (J): 25

Steel is an iron-carbon alloy with a carbon content in between. In order to ensure its toughness and plasticity, the carbon content generally does not exceed. In addition to iron and carbon, the main elements of steel are silicon.

Manganese, sulfur, phosphorus, etc. There are many ways to classify steel, and the main methods are as follows:

1. Classification by quality.

1) Ordinary steel (2) High-quality steel (3) High-quality steel.

2., classified by chemical composition.

1) Carbon steel: aMild steel; b.medium carbon steel; c.High-carbon steel.

2) Alloy steel: aLow alloy steel; b.medium alloy steel; c.High-alloy steel.

3. Classification according to forming method.

2) Forged steel; (2) Cast steel; (3) hot-rolled steel; (4) Cold drawing.

4. Classification according to use.

1) Steel for construction and engineering: aOrdinary carbon structural steel; b.low-alloy structural steels; c.Reinforced steel.

2) Structural steel.

a.Steel for machinery manufacturing: (a) quenched and tempered structural steel; (b) Case-hardened structural steel: including carburizing steel, ammonia-infiltrating steel, and steel for case hardening; (c) Easy-cut structural steel; (d) Cold plastic forming.

Steel: including cold stamping steel, cold heading steel; b.Spring steel; c.Bearing steel.

3) Tool Steel: Acarbon tool steel; b.alloy tool steel; c.High-speed tool steel.

4) Special performance steel: astainless acid-resistant steel; b.Heat-resistant steel: including steel, heat-strength steel, gas valve steel; c.electrically heated alloy steel; d.wear-resistant steel; e.steel for low temperatures; f.Electrician.

with steel. 5) Industrial steel - such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.

Summary. Pro, F45MNVS is commonly known as alloy structural steel material.

What material is F45MNvs commonly known as?

Pro, F45MNVS is commonly known as alloy structural steel material.

It is a non-quenched and tempered mechanical structural steel, with high strength and high toughness, which is used to replace quenched and tempered steel and reduce process difficulty.

Due to the suitable hardenability, after suitable metal heat treatment, the microstructure of alloy structural steel is uniform solitenite, bainite or very fine pearlite, so it has high tensile strength and yield ratio (generally around), high toughness and fatigue strength, and low ductile brittle transition temperature, which can be used to manufacture machine parts with large cross-sectional dimensions.

Nitriding steels must be heat treated to achieve the desired properties, and then finished before they can be nitrided. After nitriding, it is no longer processed, except for the removal of the brittle and thin "white layer".

One: the standard of implementation:

1: The recommended heat treatment temperature of 45 steel specified in GB T699-1999 standard is 850 normalizing, 840 quenching and hollowing, and 600 tempering, and the performance achieved is 355MPa yield strength.

2: GB T699-1999 standard stipulates that the tensile strength of 45 steel is 600MPa, the yield strength is 355MPa, the elongation is 16%, the section shrinkage is 40%, and the impact energy is 39J.

Two; Standard hardness ; Hot rolled steel: 229HB Annealed steel: 197HB.

1,45 steel after quenching and before tempering, hardness greater than HRC55 (up to HRC62) is qualified. The highest hardness for practical application is HRC55 (high-frequency quenched HRC58).

2,45 steel should not be subjected to the heat treatment process of carburizing and quenching.

Three: analysis of the requirements of processing:

1,45 steel quenched and tempered hardness between HRC20 HRC30 (heat treatment temperature: normalizing 850, quenching 840, tempering 600).

The quenching hardness of 2,45 steel is between HRC55 58, and the limit value can reach HRC62.

No. 3 and 45 steel can only be used after 15-20 days, because it needs to be aged to stabilize the properties of the steel, and the highest hardness for practical application is HRC55 (high-frequency quenching HRC58).

No. 4, 45 steel is high-quality carbon structure steel, the hardness is not high and easy to cut, and it is often used in the mold to make templates, pins, guide pillars, etc., but it must be heat treated.

5. After quenching, 45 steel is not tempered, and the hardness is greater than HRC55 (up to HRC62) is qualified.

Dear, hello, I am happy to answer for you, the difference between 65mn and 35mn Answer: No. 35 steel is medium carbon steel, with a carbon content of 65mn, high hardness, and 65mn, which is an iron-carbon alloy structure, and the cost of ferroalloy added during refining is relatively low, and the ** of No. 35 steel is cheaper. 65mn is manganese alloy steel, the carbon content reaches high carbon content, the carbon content is, in addition to the iron-carbon alloy added during smelting, manganese combined gold should be added, and the smelting cost is higher than that of No. 35 steel

65mn is a type of spring steel. Meaning of grade: 65 - the carbon content is actually usual; mn - the main alloying element is the difference between manganese shirt (the following number is not marked to indicate that the content is less than.

Actual chemical composition or with skin: c:; mn：

si：。

Summary. Hello, it must be that the 42crmo material is better, 42crmo steel belongs to ultra-high strength steel, with high strength and toughness, good hardenability, no obvious tempering brittleness, after quenching and tempering treatment, there is a high fatigue limit and multiple impact resistance, and the low temperature impact toughness is good. The steel is suitable for manufacturing large and medium-sized plastic molds that require a certain strength and toughness.

Chemical composition carbon c : silicon si:, manganese mn:

Sulfur S: permissible residual content, Phosphorus P: Permissible residual content, Chromium Cr:

Nickel Ni: Allowable Residual Content, Copper Cu: Allowable Residual Content, Molybdenum Mo:

1], which material is better, 42crmo or 45mn2.

Hello, it must be that the 42crmo material is better, 42crmo steel is an ultra-high strength steel, with high strength and toughness, hardenability is also good, there is no obvious tempering brittleness, after quenching and tempering treatment, there is a high fatigue limit and multiple impact resistance, and the low-temperature impact toughness of the punch is good. The steel is suitable for manufacturing large and medium-sized plastic molds that require a certain strength and toughness. Chemical composition: carbon c:, silicon si:, manganese mn:, sulfur s:

Permissible residual content, phosphorus p: permissible residual content, chromium cr:, nickel ni:

Allowable residual content, state silver and copper cu: allowable residual content, molybdenum mo: [1], and 45mn2 is alloy steel and only medium carbon blind selling quenched and tempered steel 45mn2, medium carbon quenched and tempered steel, strength, wear resistance and hardenability are high, the critical quenching diameter in oil is up to 10 25mm, and the critical quenching diameter in water mill is up to 22 45.