Guangzhou Changfeng Steel Co., LTD
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SAE5140 40Cr 1.7035 SCR440 Tool Steel Bar (diameter 16-450mm) for Mechanical
Chemical composition(%):
| Si | Mn | S | P | Cr | Ni | Cu |
| 0.17-0.37 | 0.70-0.90 | <=0.040 | <=0.035 | 0.70-0.90 | <=0.30 | <=0.30 |
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.
Properties:
5140 is medium carbon tempered steel, cold heading die steel.
The steel is moderate in price and easy to process. It can obtain a certain toughness, plasticity and wear resistance after proper heat treatment.
Normalizing can promote the spheroidization, improve the cutting performance of hardness less than 160HBS of blank.
The steel has the best comprehensive mechanical properties at the temperature of 550~570.
The steel is a high degree of quenching, suitable for high frequency quenching, flame hardening and other surface hardening treatment.
Heat treatment specification:
Quenching 850 degree, oil cooling; tempering at 520 degrees C, water cooling, oil cooling.
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.
All the sizes as require can be customerized as fresh production with MOQ,products of required specifications can be developed/produced per international, chinese or industry standards, or based on agreements with customers.
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Company Profile
Guangzhou ChangFeng Steel Co.,Ltd, is located in Guangzhou city, it was established in 2012,and is an Professional import and export company with ten years experience of selling special steel, which mainly sells plastic die steel, hot work die steel, cold work mould steel, alloy structural steel, bearing steel, tool steel, stainless steel, carbon steel, etc. We also act on behalf of exporting steels of mainly steel factories in China, including Baogang group,Shagang group, Wenfeng group, Xingcheng group, Dongte group, Daye and so on. We are full of export experience to the market all over the word, such as America, Germany, France, Italy, Turkey, Singapore, Thailand, Malaysia, Vietnam, Taiwan, and Middle-East.
At the same time,We offer the seamless steel pipe, welded carbon steel pipe, GI pipe, and special pipe. Fittings elbow, tee, reducer, cap, lap joint, flanges etc.. This is better for our customer to buy the different products from china, while they are saving their time, but they can enjoy in our best serves.
Guangzhou ChangFeng Steel co., Ltd has a lot of experienced and competent elites and is capable of offering the best service after years of development. 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. Our all 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 relation with importers all over the word.
We have advanced technology of management, we win the trust because of our good quality.
We have clannish conscientious and passionate salesman, we gladden and steady the customers with our best service.
We are pure-hearted and awaiting for your kind attention to our company.