Does the 4 and A in 50CrV4 and 50CrVA refer to Korean and Chinese products respectively?

The "4,a" in 50CRV4 and 50CRVA does not refer to Korean and Chinese products.

50CRV4 belongs to the German standard spring steel, the implementation standard: DIN 17221-8850CRV4 good mechanical properties and process properties, high hardenability, vanadium is added to refine the grain of the steel, reduce overheating sensitivity, improve strength and toughness, has high fatigue strength, yield ratio is also high, but poor weldability, low cold deformation plasticity. It is a high-grade spring, which is used as a high-load important spring with a large cross-section and a valve spring, piston spring, safety valve spring, etc. with a working temperature of <300.

The chemical composition of 50CrV4 is shown below

50CRVA belongs to the national standard spring steel, in which the "A" stands for "high-quality spring steel".

50CRVA executive standard: GB T 1222-200750CRVA has good mechanical properties and process properties, high hardenability, adding vanadium to refine the grain of steel, reduce overheating sensitivity, improve strength and toughness, have high fatigue strength, and the yield ratio is also high. However, the weldability is poor, and the plasticity is low due to cold deformation.

It is a high-grade spring, which is used as a high-load important spring with a large cross-section and a valve spring, piston spring, and safety valve spring with an operating temperature of <300.

The chemical composition of 50crva is shown below

No. 4 indicates its percentage content (mass percentage) (indicates high quality.

The two are different materials.

Adding A at the end of the steel grade is high-grade, which is a high-grade high-quality alloy steel, and there are restrictions on magazine elements such as phosphorus and sulfur.

Because the CR content is the same, analyze the influence of V on steel, it is a strong carbide forming element, the formation of VC particle stability is good, diffuse distribution, can effectively improve the thermal strength of steel, and these particles are small, stable, can effectively prevent the grain boundary from moving, so as to effectively refine the grain, can also improve the red hardness of the steel, wear resistance, the dissolution temperature of these particles is high, the grain is not easy to grow, so the overheating tendency is small, but due to the high hardness of the VC particle point, it is easy to produce grinding cracks in the grinding process, Therefore, the grinding property is poor.

Alloy steel: alloy steel In addition to iron and carbon, other alloying elements are added to the alloy steel, which is called alloy steel. An iron-carbon alloy composed of an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel.

According to the different added elements and the appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic can be obtained.

This should be analyzed from the role of alloying elements Adding A at the end of the steel grade is high-grade, which is a high-grade high-quality alloy steel, and there are restrictions on phosphorus and sulfur and other magazine elements Because the CR content is the same, the analysis of the impact of V on the steel, it is a strong carbide forming element, the formation of VC particle stability is good, diffuse distribution, can effectively improve the thermal strength of steel, and these particles are small and stable, which can effectively prevent the grain boundary from moving, so as to effectively refine the grain, and can also improve the red hardness and wear resistance of the steel, and the dissolution temperature of these particles is high. The grain is not easy to grow, so it has a small tendency to overheat, but due to the high hardness of the VC particle point, it is easy to produce grinding cracks during the grinding process, so the grinding performance is poor. This is only theoretical, and the specific situation needs to be analyzed on a case-by-case basis. Hope it works for the landlord!

View the original post

Hello, there is not much difference between 50crva and 50crv4, they are both special high-strength steels.

Hope it helps...

50CRV4 steel belongs to alloy spring steel, 50CRV4 is the German standard steel grade, and the corresponding Chinese is 50CRVA.

Hello 50crv4 steel belongs to alloy spring steel.

Corresponding US grade: G61500

Corresponding Japanese grade: SUP10

Corresponding domestic grade: 50CRVA

Corresponds to British grade: 735A51

Corresponding German grade: 50CRV4

The chemical composition is as follows:

Carbon C: Silicon Si:

Manganese mn:sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni:

Copper cu:

Vanadium V: Valve springs, piston springs, and safety valve springs that are generally used as high-load important springs with large cross-sections and operating temperatures of <300.

50CRV4 is the German standard steel grade of spring steel, which corresponds to the standard steel grade 50CRVA in China.

50CRV4 (Structural Steel.

Material No.: Grade: 50CrV4

Standard: EN 10083-3: 2006

Features & Applications:

50CRV4 material, German grade special steel.

Chemical Composition: Carbon C:

Silicon SI:

Manganese mn:

Phosphorus p: sulfur s:

Chromium Cr:Vanadium V:

50CRV4 is spring steel.

50crv4 is the German standard steel grade, and the corresponding to China is 50crva

What country is the 51CRV4 material from? What kind of material can be substituted with China?

51CRV4 spring steel is in accordance with the British standard. Corresponds to the domestic 50CRV.

51crv4 (spring steel has good mechanical properties and process properties, high hardenability, adding vanadium to refine the grain of steel, reduce overheating sensitivity, improve strength and toughness, has high fatigue strength, yield ratio is also high, but poor weldability, low plasticity due to cold deformation.

51CRV4 is a high-grade spring, which is used as a high-load important spring with a large cross-section and a valve spring, piston spring, and safety valve spring with an operating temperature of <300.

Chemical composition. 50crva (spring steel.

50crva (spring steel (7 photos)

Carbon C: Silicon Si:

Manganese mn:sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni:

Copper cu:

Vanadium V: Mechanical properties.

Tensile Strength B (MPa): 1274(130).

Yield strength s (mpa): 1127(115).

Elongation δ5 (%10

Section shrinkage 40

Hardness: hot-rolled, 321HB; Cold Drawing + Heat Treatment, 321HB

Heat treatment specifications and metallographic structure.

Heat treatment specification: quenching 850 20, oil cooled; Temper 500 50 (30 if special needs).

Delivery Status: Hot-rolled steel is delivered in heat-treated or non-heat-treated condition, and cold-drawn steel is delivered in heat-treated condition.

Both 60Si2Mn and 51CrV4 are spring steels with similar mechanical properties.

Mechanical properties of 60Si2Mn: S 1176MPa, B 1274MPa, ΔS 5%, 25%.

51CrV4 mechanical properties: S 1175MPa, B 1500MPa, δS 6%, 40%, shear and torsional allowable stress 1050MPa. The fatigue life reaches 3 million times; Allowable shear and torsional stresses 1050MPa.

The operating temperature of 51CrV4 can reach 300 degrees Celsius, and 60Si2mn can only reach 250 degrees. In addition, 60Si2MN is mostly used in the manufacture of leaf springs, worm coil springs and springs with a wire diameter of less than 30mm, and 51CRV4 is mostly used in the manufacture of springs with larger diameters.

51crv4

51CRV4 is a British standard spring steel grade, which is called 50CRV spring steel in China, and tool steel grade: 51CRV4

Number standard: DIN 17350

Chemical Composition: Carbon C:

Silicon si:manganese mn:

Chromium Cr:Vanadium V:

51CRV4 belongs to the British standard spring steel, and the implementation standard: BS EN ISO 683-2018

The chemical composition of 51CrV4 is shown in the following figure:

From the perspective of chemical composition, 51CrV4 is equivalent to the domestic grade "50CrV".

51CRV4, the steel grade is a German grade, this steel grade has a good hardness, at present, the steel grade mainly relies on imports, and cannot be replaced in China.

Steel is widely used and varied, according to the different cross-sectional shapes, steel is generally divided into four categories: profiles, plates, pipes and metal products. Steel is a material of a certain shape, size, and properties that ingots, billets, or steel are made by pressure processing. Most steel processing is carried out by pressure processing, which causes plastic deformation of the processed steel (billets, ingots, etc.).

According to the different processing temperatures of steel, it can be divided into two types: cold working and hot working.

Hello, the 51crv4 material is German, and there is currently no substitute material number in China:

Executive standard (European standard): EN 10089-2002 Chemical composition:

Carbon C: Silicon Si:

Manganese-sulfur s:

Phosphorus p:

Chromium-nickel ni:

Copper cu:

Vanadium V: Mechanical properties.

Tensile Strength B (MPa): 1274(130)Yield Strength S (MPa): 1127(115)Elongation δ5 (%10

Section shrinkage 40

Hardness: hot-rolled, 321HB; Cold drawing + heat treatment, 321HB heat treatment specification and metallographic structure.

Heat treatment specification: quenching 850 20, oil cooled; Temper 500 50 (30 if special needs).

51CRV4 belongs to the British standard spring steel, this steel grade has good hardness, at present, the steel grade mainly relies on imports, can not be replaced in China.

Fourth, there are many professional forums and knowledge platforms on the Internet, and there are also a lot of information on them, and I always go to the forum to seek solutions to professional problems.

Fifth, ask your questions more carefully and clearly! It's easier for people to understand what it means!

Thanks for taking my suggestion! !

The different European standards are basically the same. The main difference is the difference in carbon content.

50CrV4: Carbon C:

51CrV4: Carbon C:

However, a few years ago, Europe changed to 51CRV4 in accordance with the German standard DIN 2093 standard, that is, there is no 50CRV4 now.

Compared with China's grades, they are all 50CRVA.

50crva is a steel grade that represents a type of spring steel. The chemical composition of 50crva is as follows:

Carbon C: Silicon Si:

Manganese mn:sulfur s:

Phosphorus p:

Chromium Cr: Nickel Ni:

Copper cu: vanadium v :

50CRVA spring steel corresponds to American grade: G61500 corresponds to Japanese grade: SUP10 corresponds to German grade:

50CRV4 corresponds to the British grade: 735A51 Corresponds to the French grade: 50CV4 Generally, there are round steel plates and more plates.

It is an alloy steel with a content of c:; si：；mn：；cr::v:, often used as spring steel wire.

【50crva】Steel Name: Spring Steel; Grade: 50crva; Executive Standards:

GB T 1222-2007 "Spring Steel". The two digits at the beginning of the steel number indicate the carbon content of the steel, indicating that the average carbon content is about 5 parts per thousand, 50crva has good mechanical properties and process properties, high hardenability, adding vanadium to refine the grain of the steel, reduce overheating sensitivity, improve strength and toughness, have high fatigue strength, and the yield ratio is also high.

Chemical Composition: Carbon C:Silicon SI:Manganese mn:Sulfur s : phosphorus p : chromium cr:; Nickel ni: ; Copper cu:Vanadium v :.

<50crva spring steel》The first choice is Shanghai Zhilian Iron and Steel ****** factory direct supply quality assurance! Professional sales.

50CRVA is a high-grade spring, which is used as a high-load important spring with a large cross-section and a valve spring, piston spring, and safety valve spring with an operating temperature of <300.

Density. 50CRV4 steel is alloy spring steel. 50CRV4 has good mechanical properties and process properties, high hardenability, adding vanadium to the steel to refine the grain, reducing the overheating sensitivity, improving the strength and toughness, has high fatigue strength, high yield ratio, but poor welding performance, 50CRV4 hot-rolled steel has low cold deformation plasticity.

Forged steel Hot rolled steel: round steel, square steel, plate, coil, wire rod, forging.

Chemical composition: c: 0,47 - 0,55

si：max. 0,40

mn：0,70 - 1,10

p：max. 0,035

s：max. 0,035

cr：0,90 - 1,20

v：0,10 - 0,25

Size: Round rebar: diameter 50mm to 1000mm

Square steel: diameter 70mm to 1000mm

Flat Plate Flat Plate: Thickness: 60mm to 800mm

Width: 200mm to 2000mm

Length: 3m and above or as per customer's requirements.

Forgings: step shafts, pipes, cakes, rings, modules, main valves, and other special-shaped forgings.

Delivery terms: hot forging, hot rolling annealing, normalizing, tempering, quenching and tempering, solid solution, aging, slow cooling.

Surface Quality: Black Surface, Ground Surface, Rough Machining, Finishing.

Smelting process: electric arc furnace-furnace-furnace-gas-liquid-gas-liquid (ESR).

Ultrasonic flaw detection: According to the customer's technical standards, the ultrasonic flaw detection is qualified.

Mechanical properties - heat drying, heat treatment and hardness.

Hot working temperature: 1100 850

Heat treatment temperature |Annealing: 680 720

Heat treatment temperature |Normalizing: 870 900

Heat treatment temperature |Quenching: 820 850 water. 830 860 oil.

Heat treatment temperature |Tempering: 480 650

Heat treatment temperature |Case Hardening: 840 870

Surface hardness HBC: 57-62

Forging. Forged at 1050°C. Do not process the steel when the temperature drops below 840°C. Anneal.

Slowly heat to 820-840°C and soak well. Cool slowly in the furnace. (Our annealing is carried out in an electric furnace to avoid decarburization.) Hardening.

Gradually preheat to 650-700°C and soak completely. Continue heating to a final hardening temperature of 830-860° and allow the components to be heated through. Quench in oil.

Apply. EN47 spring steel, the outstanding advantage is that it has high hardenability, in addition to hot working properties, good comprehensive mechanical properties, good decarburization resistance, and is a large cross-section of various important springs. For example, automobiles, locomotives, large plates, springs, etc.

SUP10 spring steel is mainly used for heavy vehicles, tractors, industrial production loads, stresses and large leaf springs and screw flex springs. It is also widely used in the motor vehicle industry and many general engineering applications. It is also suitable for applications that require high tensile strength and toughness.

Typical applications include crankshafts, knuckles, gears, spindles, and pumps.