4J50 alloy is an iron nickel constant expansion alloy that contains approximately 50% nickel and a small amount of elements such as titanium, copper, and aluminum. Its characteristic is that it has an extremely low coefficient of thermal expansion within a certain temperature range and can be matched with certain materials such as ceramics and glass. The specific features are as follows:
1. Good thermal expansion: 4J50 alloy has a very low coefficient of thermal expansion within a certain temperature range, and can be matched with certain materials such as ceramics and glass to ensure the dimensional stability of sealing components.
2. Good thermal stability: 4J50 alloy has good stability and oxidation resistance at high temperatures, and can work stably for a long time at high temperatures.
3. Excellent mechanical properties: 4J50 alloy has good mechanical properties, high strength, good ductility, and moderate hardness, suitable for various cold and hot working processes.
4. Good corrosion resistance: 4J50 alloy has good corrosion resistance and can work stably in acid and alkali media for a long time.
4J50 alloy is widely used in the field of electric vacuum technology, such as sealing materials for vacuum tubes, electric vacuum devices, semiconductor devices, etc. In addition, it can also be applied in fields such as aerospace, precision instruments, optical instruments, etc.
Company Profile
Wuxi Dingyu Xinda Special Steel Co., Ltd. has world-class metallurgical equipment, mature and stable technology, and safe and reliable process flow. The smelting of special functional superalloys adopts the VIM+VAR dual vacuum dual process and the VIM+PESR+VAR triple process for smelting production; Vacuum induction melting (VIM), vacuum consumable (VAR), atmosphere protected electroslag remelting (PESR) and conventional process IF+AOD+LF+VOD metallurgical equipment. Processing equipment such as heat treatment furnaces, peeling machines, rolling straightening machines, cold drawing machines, and coreless grinders; German Spike direct reading spectrometer, hardness machine, tensile machine, impact testing machine, automatic and manual ultrasonic non-destructive testing machine, eddy current non-destructive testing machine, corrosion testing machine,salt spray testing machine, German Leica metallographic microscope and other complete testing equipment. Since 2005, Dingyu.
F A Q
1. How can I know whether you are a reliable company?
We have been engaged in the steel industry for nearly 7 years and have a high reputation in China, We welcome you to inspect our company at any time.
2. Can you guarantee your products?
Yes, we guarantee your 100% satisfaction on all our products. Please feel free to feedback us immediately.
3. Do you provide samples?
Yes, we can provide most of the product samples. We will charge a little sample fee. But we will return the charge if you place an order. if you asked to use DHL, Blue Dart Express, FedEx, etc. to send samples, you can inform us in advance to prepare.
4. Can I visit your company?
Of course, If you want to order our products and visit our company, please contact us to make an appointment.
5. Can you make boxes according to my request ?
Yes,customization service is available,OEM business is appreciated.
When you place the orders,we arrange the production asap,When finish the orders, we will inform you and also we arrange the shipping in the same time.
6. How much is the freight?
It depends on the number and transport methods. When asked about the freight, we want you to let us know your detailed information , such as the product name and quantity and your favorite mode of transport, as well as your designated port or airport. We thank you for providing us the information to estimate the cost.
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