50CrVA Spring Steel

50CrVA spring steel has good mechanical properties and process performance, high hardenability, adding vanadium to refine the grain of the steel, reduce overheating sensitivity, improve strength and toughness, have high fatigue strength, and have a relatively high yield ratio. high. However, 50CrVA spring steel has poor weldability and low plasticity due to cold deformation. It is a higher-grade spring, used as a high-load important spring with a larger section and a valve spring, piston spring, and safety valve spring with an operating temperature of <300 ℃.

Generally, the supply specification of the sheet material is between 1.5 and 10.0 mm, and it is often annealed, and more than 10 to 30 mm is mostly in the non-annealed state. There are few stocks on the market, so it is often necessary to order futures. The steel coil is in a hot-rolled state, and spheroidizing annealing is used to reduce the hardness in order to create conditions for further processing.

FUSHUN Steel's 50CrVA is generally annealed sheet, eliminating the need for re-annealing. Medium-carbon alloy spring steel, the final heat treatment is quenching and tempering. After heat treatment, the steel has good toughness, high ratio limit and strength limit, and high fatigue strength, similar to the hardenability of 65Si2MnWA. Hardenability, low overheating sensitivity; when the parts are used at 300 ℃, their elasticity can still be maintained. The cutting performance of steel is still good, but the plasticity is low during cold deformation and the weldability is poor.

Dimensions and permissible deviations

Thickness: 0.1 to 4mm; Tolerances: +/- 0.008 to 0.11 mm

Width: 10 to 600mm; Tolerances: +/- 0.15 to 0.60mm

Chemical Composition:

Mechanical Propoerties:

Heat treatment specification and metallographic structure:

Heat treatment specification:

hot-rolled steel is delivered in heat-treated or non-heat-treated state, and cold-drawn steel is delivered in annealed state.

Metallographic structure:

quenched at 850℃±20℃, oil-cooled; tempered at 500℃±50℃ (for special needs, ±30℃), the organization is tempered troostite or a mixed organization of troostite and sorbite.

Critical point temperature (approximate value) Ac1=752℃, Ac3=788℃, Ar3=746℃, Ar1=688℃.

Quenching and tempering treatment specification:

quenching temperature 860-880℃, oil cooling; tempering temperature 500±10℃, water and oil cooling.

Equivalent Grade:

American : G61500

Japanese : SUP10

German : 50CrV4

British : 735A51

French : 50CrV4

Acceptance testing and test certificates

EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.

For over 20 years, Fushun Steel, have been dedicated to manufacturing high-quality spring steel wire. Our stable quality and superior technique are the foundations of our success, and we pride ourselves on delivering products that meet or exceed our customers' expectations. With a focus on innovation and efficiency, we utilize the latest technologies to ensure consistent quality and timely delivery.

We have more than 400 employees and our plant covers an area of nearly 15,000 square meters, with an annual output of 100,000 tons. Our advanced equipment allows us to produce high-quality spring steel products efficiently, meeting the needs of our customers.

In the production of spring steel wire, a variety of specialized equipment is essential. Shot Peening Machine. Wire Drawing Machine. Phosphating Equipment. Annealing Furnace. Polishing Equipment. Wire Coiling Machine. End Grinding Machine. Tensile and Compression Testing Machine.

Our commitment to excellence and reliability has resulted in long-standing partnerships with some of the biggest names in the industry. Like MW Industries, NHK Spring, Scherdel, Sogefi, Mubea etc. We also have established partnerships with several prominent Chinese steel groups, like Baowusteel, Xinyusteel, Nanjinsteel, Shagang etc.

Our spring steel wire comes in various categories such as music wire, hard drawn wire, oil tempered wire, chrome silicon wire, chrome vanadium wire, stainless steel wire, nickel plated wire, phosphate coated wire, galvanized wire, and copper coated wire.

Spring steel wire is a versatile material that is utilized in the manufacture of a wide array of products. including automotive suspension springs, valve springs, and torsion springs. Beyond springs, paper clips and mattress supports. In addition, spring steel wire is essential in the creation of retaining rings and circlips that are utilized to secure components on shafts or within bores, and in making various types of fasteners. The durability and resilience of spring steel wire also make it a key material in the manufacturing of certain types of cable, fencing, and even some musical instruments, such as piano and guitar strings, where its ability to return to its original shape after deformation is highly valued.