Multifunctional Tool Steel Bar Quenched And Tempered In Machinery Manufacturing SAE5140

Special Quenched and Tempered Tool Steel Flat Bar SAE5140 / 40Cr

SAE5140 / 40Cr steel is one of the most widely used steel in machinery manufacturing, it is suitable for making medium-sized plastic mold.

Chemical composition(%):

Applications:

1. The steel is used to manufacture mechanical parts with moderate load and moderate speed, such as steering knuckle and rear axle of the car, gear, shaft, worm, spline shaft and top cover on the machine tool.

2. After quenching and tempering at medium temperature for the manufacture of high load, impact and moderate speed work of the parts, such as gears, spindles, pump rotor, slider, rings, etc .;

3. After quenching and tempering at low temperature for the manufacture of heavy load, low impact and wear resistance, the cross section of the physical thickness of 25mm below the parts, such as worm, spindle, shaft,

4. After quenched and tempered and high frequency surface hardening for the manufacture of high surface hardness and wear resistance without great impact on the parts, such as gears, bushings, shafts, spindles, crankshafts, spindles, pins, connecting rods, Screws, nuts, intake valves and so on.

5. In addition, this steel is suitable for the production of various transmission parts for carbonitriding, such as gears and shafts with large diameters and low temperature toughness.

Availability and hardness

Annealed, hardness ≤ 207HBS.

Delivery condition:

Hot rolled or forged/ peeled or black surface/annealed or Q+T.

Delivery time:

For abundant stock, 15-20 days.
For customized products, 30-50 days.

More about SAE5140 / 40Cr tool steel

It is widely used in machinery manufacturing, the mechanical properties of this steel is very good.

But this is a medium carbon steel, quenching performance is not good, 40Cr can be hardened to HRC42 ~ 46. So if you need surface hardness, but also hope to play 40Cr superior mechanical properties, often 40Cr surface carburizing and quenching, so you can get the required surface hardness.

40Cr Elastic modulus E (20 ℃) / MPa 200000 ~ 211700, Shear modulus G (20 ℃) 80800

Welding process points:

1, Usually in the annealed (normalizing) state welding.
2, Welding methods are not limited
3, With a larger line of energy, appropriate to improve the preheating temperature, the general preheating temperature and the interlayer temperature can be controlled between 250 ~ 300 ℃.
4, Welding materials should ensure that the deposited metal composition and base metal is basically the same, such as J107-Cr
5, After quenching and tempering heat treatment should be promptly carried out. If the timely quenching and tempering difficulties, can be intermediate annealing or at higher than the preheating temperature for a period of time to exclude the proliferation of hydrogen and soften the organization. For the complex structure, the weld more products, welding a certain number of welds, after an intermediate annealing.

Guangzhou ChangFeng Steel Co., Ltd. is a professional special steel company, which specialized in exporting mould steel products based in China.With twenty years experience in special steel industry, our main products are Plastic Mould Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and Forged Block.

To ensure provide high quality products to customers, we have close cooperation with many Chinese first class special steel enterprises, including Baosteel Group, Dongbei Special Steel, Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng Special Steel, Daye Special Steel. We have thousand tons of stock materials in our own factory and also can provide processing services to customers. We are full of export experience for many years, the product covers America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.

After years of development, the company has established a complete quality management and export service system. We have a group of experienced and competent elites and is capable of offering the best service to clients. Our company equips with large-sized Vertical saw machines, Horizontal saw machines, Milling machines, Grinding machines and other advanced equipments to provide customers with cutting and other processing services. All the products should be inspected the metallographic analysis, hardness, ultrasonic flaw detection and other strict inspection processes, which meet the standards of DIN, AISI, JIS and GB to ensure their function and quality.

Our company keeps the principle of “sincerely cooperation, endless striving for perfection”. We desire to establish the long-term mutual beneficial and win-win relationship with clients all over the world.