Annealed Tool Steel Bar Low Notch Sensitivity For Machinery SAE5140 / 40Cr

Hot Rolled Annealed Steel Round bar SAE5140 / 40Cr For Machinery Manufacturing

SAE5140 / 40Cr is China's standard steel GB, this steel is one of the most widely used steel manufacturing machinery.

After quenching and tempering has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity.

Good hardenability of steel, water quenching can be hardened to Ф28 ~ 60mm, oil quenching can be hardened to Ф15 ~ 40mm. In addition to quenching and tempering of this steel is also suitable for cyanidation and high-frequency quenching.

Cutting performance is better, when the hardness of 174 ~ 229HB, the relative cutting of 60%. The steel suitable for making medium-sized plastic mold.

1, Chemical composition(%):

2, Application:

ASTM5140 is the most commonly used alloy structural steel, tensile strength, yield strength and hardenability are higher than the 40 steel, but the weldability is limited, there is a tendency to crack.
ASTM5140 is used for more important quenching and tempering parts, such as parts under variable load, medium speed and medium load.

3, Properties:

4, Heat treatment specification:

Quenching 850 degree, oil cooling;
Tempering at 520 degrees C, water cooling, oil cooling.

5, Features

1) Medium carbon quenched and tempered steel, cold heading steel.

2) The steel price is moderate, easy processing, after appropriate heat treatment to obtain a certain degree of toughness, ductility and wear resistance.

3) Normalizing can promote the organization of the ball, improve the hardness of less than 160HBS rough cutting performance.

4) Temperatures 550 ~ 570 ℃ for tempering, the steel has the best overall mechanical properties.

5) The steel hardenability higher than 45 steel, suitable for high-frequency quenching, flame hardening and other surface hardening treatment.

6, Delivery condition:

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

7, Delivery time:

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

8, Our service:

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.