What is 35cr and what is 35CrMo?

35cr, alloy structural steel, and 30cr steel belong to the same medium carbon alloy quenched and tempered steel with high strength and toughness, and the strength limit is higher than that of the corresponding grade of 35 steel.

20% higher, hardenability.

It is slightly higher than 30cr, and the other process properties are similar to those of 30cr.

Corresponding grades. U.S. Grade: 5135 Standard Grade: ASTM Japanese Grade: SCR435 Standard Grade: JIS

ISO grade: 34CR4 Standard grade: ISO 683 1:1987 German grade: Standard number: EN 1008 3-2006 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

Use. It is used to manufacture gears, shafts, rollers, bolts and other important quenching and tempering parts, and the purpose is basically the same as that of 30cr.

35CRMOA is made of alloy structural steel.

35CrMo alloy structural steel, with high static strength, impact toughness and high fatigue limit, higher hardenability than 40Cr, high 35CrMo creep strength and lasting strength at high temperature, long-term working temperature up to 500; The plasticity is medium and the weldability is poor when cold deformed. It is used as an important structural part for working under high loads, such as transmission parts for vehicles and engines; The rotor and spindle of the turbine power generation fiber machine, the transmission shaft of the heavy load, and the large section parts.

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: Allows early vertical coding of residual content

Molybdenum MO: Mechanical Properties: Tensile Strength B (MPa): 985(100)Yield Strength S (MPa): 835(85)Elongation δ5 ( 12

Section shrinkage (45

Impact power AKV (J): 63

Impact toughness value kv (j cm2): 78(8)hardness: 229hb

Specimen size: The specimen blank size is 25mm

35CRMO belongs to the national standard alloy structural steel, and the implementation standard: GB T 3077-2015

35CrMo has high static strength, impact toughness and high fatigue limit, higher hardenability than 40Cr, high creep strength and lasting strength at high temperature, and long-term working temperature up to 500; The plasticity is medium and the weldability is poor when cold deformed. Low temperature to -110 degrees Celsius, and has high static strength, impact toughness and high fatigue strength, good hardenability, no overheating tendency, quenching deformation is small, cold deformation when the plasticity is acceptable, cutting machinability is medium, but there is the first type of tempering brittleness, weldability is not good, preheating to 150 400 degrees Celsius before welding, post-welding heat treatment to eliminate stress, generally used after quenching and tempering treatment, can also be used after quenching or quenching on the surface of high and medium frequency and low and medium temperature tempering. The steel is mainly used to make important parts in various machines that are subjected to impact, torsion, and high loads.

The chemical composition of 35crmo is shown below

35crmo steel.

35CRMO steel is an engineering alloy steel in China, which has high high temperature durability and creep strength, and good low temperature impact toughness. The working temperature can reach 500 meters, the low temperature can reach -100 meters, it has high static strength and high fatigue strength, good hardenability, no overheating tendency, small quenching deformation, and moderate machinability. But this material has the first type of tempering brittleness, and the weldability is not good.

It needs to be preheated to 150-400 before welding, and heat treatment is required to relieve stress after welding. It is generally used after quenching and tempering.

35crmo steel chemical composition.

35crmo alloy steel mechanical properties.

Yield strength: 835 MPa

Tensile strength: 980 MPa

Elongation: 12%.

Area reduction rate: 45%.

Impact absorption energy: 63 J

Brinell hardness: 229 (annealed or high temperature tempered steel bar).

Sample size: 25mm

04 Heat treatment specifications.

Primary quenching heating temperature: 850 (coolant-oil).

Tempering heating temperature: 600 (coolant - water, oil).

05 equal.

35CRMO is equivalent to American ASTM, European German DIN EN, British BS EN, French NF EN, Japanese JIS, ISO standards.

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35CRMO is made of alloy steel. The steel is used in the manufacture of important parts in various machines that bear impact, bending torsion, and high loads, such as rolling mill herringbone gears, crankshafts, hammer rods, connecting rods, fasteners, steam turbine engine spindles, axles, engine transmission parts, large motor shafts, perforators in petroleum machinery, etc.

Strength characteristics: 35crmo alloy structural steel, with high static strength, impact toughness and high fatigue limit, higher hardenability than 40cr, high creep strength and lasting strength at high temperature, long-term working temperature up to 500; The plasticity is medium and the weldability is poor when cold deformed. Low temperature to -110 degrees Celsius, and has high static strength, impact toughness and high fatigue strength, good hardenability, no overheating tendency, quenching deformation is small, cold deformation plasticity is acceptable, cutting machinability is medium, but there is the first type of tempering brittleness, weldability is not good, preheating to 150 400 degrees Celsius before welding, post-welding heat treatment to eliminate stress, generally used after quenching and tempering treatment, can also be used after quenching or quenching on the high and medium frequency surface and low and medium temperature tempering.

Wugang production implementation standard: GB T11251-2009, Wugang enterprise standard, military standard, delivery status: normalizing or normalizing + tempering, quenching and tempering.

35crmo alloy structural steel35CrMo Features:35CrMo (AISI4135) steel is also a CR-MO series alloy structural steel, 35CRMO steel has high lasting strength and creep strength at high temperature, good impact toughness at low temperature, high temperature up to 500, low temperature up to 110, and has high static strength, impact toughness and high fatigue strength, good hardenability, higher hardenability than 40Cr steel, critical quenching diameter in oil is about 16-78mm, no overheating tendency during heat treatment, small quenching deformation, However, there is the first type of tempering brittleness, the plasticity is acceptable when cold deformation, the machinability is medium, the weldability is poor, the preheating needs to be preheated to 150 400 before welding, and the heat treatment after welding is used to eliminate stress, which is generally used after quenching and tempering treatment, and can also be used after quenching or quenching on the high and medium frequency surfaces and tempering at low and medium temperatures.

35crmo chemical composition:Carbon C:

Silicon SI:; Manganese mn:;

Chromium cr:; Molybdenum mo:;

Nickel Ni: permissible residual content;

Copper Cu: Permissible residual content

Sulfur S: Permissible residual content

Phosphorus p: permissible residual content

35CrMo Heat Treatment Specification:Heat treatment specification: quenched 850, oil cooled; Tempered 550, water-cooled, oil-cooled.

35CrMo mechanical properties:Tensile strength b (mpa): 980

Yield strength s (mpa): 835

Elongation δ5 (%12

Section shrinkage (45

Impact power AKV (J): 63

Hardness : 229HB

Specimen size: The specimen blank size is 25mm

35CRMO Main Specifications:35CrMo round bar, 35CrMo rolled bar, 35CrMo forging bar, 35CrMo forging, 35CrMo plate, 35CrMo forging ring, 35CrMo pipe.

35CRMO is an alloy structural steel, the executive standard: GB T3077-1988, the corresponding standard: JIS

g4053：2003

Uses: used to manufacture important parts in various machines that bear impact, bending torsion, and high loads, such as rolling mill herringbone gears, crankshafts, hammer rods, connecting rods, fasteners, steam turbine engine spindles, axles, engine transmission parts, large motor shafts, perforators in petroleum machinery, boiler bolts with working temperatures below 400 degrees Celsius, nuts below 510 degrees Celsius, high-pressure seamless thick-walled conduits in chemical machinery (temperature 450 500 degrees Celsius, no corrosive medium), etc., It can also be used instead of 40crni for the manufacture of high-load transmission shafts, turbine engine rotors, large-section gears, support shafts (diameter less than 500mm), etc. Process equipment materials, pipes, welding consumables and so on.

Name: Alloy structural steel.

Grade=35crmo

Material state = heat treated or not heat treated.

b\mpa=≥980

s\mpa=≥835

Hardness HB= 229

Specimen blank size mm=25

Heat treatment ="Heat treatment process parameters: quenching treatment.

Chemical composition = heating temperature: 880

Characteristics and application = The cooling method after quenching treatment is: oil cooling; Nitriding tempering.

35CRMOV alloy steel

35CRMOV Introduction:

35CRMOV is used after quenching and tempering, and is used in heavy or medium-sized machinery manufacturing to manufacture important parts that work under high stress, such as steam turbine impellers that work under 500 520 for a long time, rotors, cover plates, shaft discs, generator shafts with low efficiency, and parts for powerful engines that work under 500 520 for a long time.

35CRMOV alloy structural steel Unified digital code: A31352 Standard: GB T 3077-1988

35CrMOV Chemical Composition:

Carbon C: Silicon Si:

Manganese Mn: Chromium Cr:

Vanadium V: Molybdenum Mo:

35CrMov Mechanical Properties:

Specimen blank size mm=25

Heat treatment: the first quenching heating temperature ( ) 900; Coolant: Oil.

The second quenching heating temperature ( ).

tempering heating temperature ( ) 630; Coolant: water, oil.

Tensile Strength B (MPa): 1080(110).

Yield Strength s (MPa): 930(95).

Elongation δ5 (%10

Cross-sectional shrinkage 50

Impact power AKV (J): 71

Impact toughness value kv (j cm2): 88(9).

Brinell hardness (HBS100 3000) (annealed or high-temperature tempered): 241

35CrMOV characteristics and scope of application:

The hardenability and high temperature strength are better than that of 34crmo steel, and the heat treatment of water and oil quenching can improve the impact value. The creep strength and endurance strength at 550 are both more than 34 crmo, but after 5000 hours, the mechanical properties decrease sharply. It is used for rotors, impellers, generator ring forgings and other important parts and gears working under high stress with a working temperature below 500 520.

35CRMOV Delivery Status:

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

35CRMOV Key Features:

This kind of steel has high strength and good hardenability, with a critical hardening diameter of 25 108mm in oil, and a slight tempering brittleness during heat treatment, but the steel has low plasticity and poor weldability when it is cold deformed.

35CRMOV Main Specifications:

35CrMOV round bar, 35CrMOV flat bar, 35CrMOV plate, 35CrMOV pipe, 35CrMOV forging, 35CrMOV forging ring.

35CRMOV belongs to the national standard heat-resistant alloy structural steel, and the executive standard: GB T 3077-2015

35CRMOV is used after quenching and tempering, and is used in heavy or medium-sized machinery manufacturing to manufacture important parts that work under high stress, such as steam turbine impellers that work under 500 520 for a long time, rotors, cover plates, shaft discs, generator shafts with low efficiency, and parts for powerful engines that work under 500 520 for a long time.

The chemical composition of 35CrMov is shown in the figure below

35CRMOV, Alloy Structural Steel [Application Example] This steel is used after quenching and tempering, and is used in heavy or medium-sized machinery manufacturing to manufacture important parts that work under high stress, such as steam turbine impellers, rotors, cover plates, axle discs of advanced turbine blowers and compressors that work under 500 520 for a long time, generator shafts with low efficiency, and parts of powerful engines. [3] [Representation] The two digits at the beginning of the steel number indicate the carbon content of the steel, which is expressed in a few ten-thousandths of the average carbon content, such as 40cr, 25cr2mova alloy pipe The main alloying elements in the steel, except for individual microalloy elements, are generally expressed in a few percent. When the alloy content is averaged, only the element symbol is generally marked in the steel grade, but the content is not indicated, but in special cases, it is easy to be confused, and the number can also be marked after the element symbol"1", such as steel grades"12crmov"with"12cr1mov", the former has a chromium content, the latter is, and the rest of the components are all the same.

When the alloying element content is average, the content should be indicated after the element symbol, which can be expressed as ...... accordinglyWait. For example, 18Cr2Ni4Wa. Alloying elements such as vanadium V, titanium Ti, aluminum Al, boron B, and rare earth RE in steel are all microalloying elements, although the content is very low, they should still be marked in the steel number.

For example, 20MnVB steel. Vanadium is, boron is. High-grade high-quality steel should be added at the end of the steel grade"a"to distinguish it from general high-quality steel.

Alloy structural steel for a special purpose, with the steel number prefixed (or suffix) with a symbol that represents the purpose of the steel grade. For example, for 30CrMnsi steel for rivets, the steel number is expressed as ML30CrMnsi. Alloy pipes and seamless pipes are both related and different, and cannot be confused.

Alloy pipe is defined by steel pipe according to the material used in production (that is, the material), as the name suggests, it is a pipe made of alloy; The seamless pipe is defined by the steel pipe according to the production process (seam seamless), and the difference from seamless pipe is the seam pipe, including straight seam welded pipe and spiral pipe.