Imported Precision Alloy 4j40 High Permeability Expansion Alloy at High Temperature

• Product Type: Rod
• Material: Other
• Carbon Content: Other
• Model NO.: 4J40
• PCD: Other
• ET: Other
• Delivery: 7-15 Days
• Price Item: T/T,30% Payment in Advance,70% T/T After The Co
• Quality Control: Mill Test Certificate Is Supplied with Shipment
• Export Country: USA,Southeast Asia,MID East,Africa,Eastern Asia,
• Transport Package: Waterproof Cloth Packaging and on Pallets, or AC
• Specification: 2.0*1250*C/1.5*1250*C/0.8*1250*C/1.0*1250*C
• Trademark: China
• Origin: China

Product Description

4J40 

4J40 is a Fe-Ni-Co ternary alloy with a Curie point above 300°C. The alloy has a low expansion coefficient in the temperature range of -20 to 300°C, and does not transform from austenite (γ) to martensite (M) until the temperature of -60°C. The alloy is mainly used in the manufacture of instrument parts and electronic devices that require highly precise dimensions within the temperature range of -50 to 300°C.

4J40 heat treatment system standard stipulates the expansion coefficient and the performance test sample of low temperature structure stability according to the following method processing and heat treatment: the semi-finished sample is heated to 840 ºC ± 10 ºC, kept for 1h, water quenched, and then the sample is processed into Finished samples are kept at 315°C±10°C for 1h, then cooled in the furnace or in air.

4J40 Application Overview and Special Requirements This alloy is a new product developed in my country in the 1970s. Stable performance after years of use. It is mainly used in the electric vacuum industry to manufacture various beam tuning tubes, resonant cavities of microwave tubes and parts whose dimensions change little with temperature. In use, the heat treatment process and processing process should be strictly controlled, and its tissue stability should be strictly tested according to the use temperature.
 

Chemical composition

C	Si	Mn	P	S	Ni	Co	Fe
					32.4	7.00
0.05	0.15	0.25	0.020	0.020	33.4	8.00	allowance

Solucky steel Limited is a third-party supply chain service enterprise focusing on materials for automobiles, high-end household appliances, as well as material processing and storage. Its headquarters and warehouse base are set up in Shanghai BaoShan, and has branches all over the country, 20+ subsidiary companies,including Foshan, Guangdong, Chongqing, Wuxi, etcz.
Main Products

 

Product Application

Machines & Processing

Packing & Delivery & logistics

Why Choose Us

FAQ
1.Where is your factory?
Our head office and warehouse located in Shanghai--the biggest steel making center of China 

2.How long is your delivery time?                                                                                
Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.      
                                                                         
3.What about the MOQ?                                                                                
MOQ only 200KG,include coils and sheets     
                                                                           
4. How long is your lead time?                                                                                
In general, our delivery time is within 7-15 days, and may be longer if the quantity is extremely large or special circumstances occur.
                                                                                
5.How's your product quality?                                                                                
We only sell mid to high end steel materials,100% quality guarantee and cost-effective.                                                                                
6.What are your terms of payment?                                                                                
You can make the payment to our bank account,T/T, 30% deposit in advance, 70% balance against the copy of B/L.  
                                                                             
7.How many countries you already exported to?                                                                                
We have exported to America, Canada, Brazil, Chile, Colombia, Russia, Ukraine, Thailand, Myanmar, Vietnam, India, Kenya, Ghana,somalia and other African countries.Our export experience is rich, we familiar with different market demands, can help customers avoid a lot of trouble.     
                                                                           
8.What are the certifications for your products?                                                                                
We have ISO 9001, MTC, third parties' inspections are all available such SGS, BV ect.