4j32 Precision High Permeability and High Resistance to Import Soft Magnetic Alloy Spot The Latest Prices

• Product Type: Rod
• Material: Other
• Carbon Content: Other
• PCD: Other
• ET: Other
• Delivery: 7-15 Days
• Model NO.: 4J32
• 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

4J32

4J32 alloy is also called Super-Invar alloy. In the temperature range of -60 ~ 80 ºC, its expansion coefficient is lower than that of 4J36 alloy, but its low temperature structure stability is worse than that of 4J36 alloy. The alloy is mainly used in the manufacture of high-precision instrument parts that require high dimensionality within the range of ambient temperature changes.

The alloy is a typical low-expansion alloy, which has been used by aviation factories for a long time and has stable performance. It is mainly used in the manufacture of precision components with highly variable dimensions within the range of ambient temperature changes. In use, the heat treatment process and processing process should be strictly controlled, and its structural stability should be strictly tested according to the use temperature.

4J32 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 1 hour, quenched in water, 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.
After the alloy is treated according to the specified heat treatment system, it should be cooled at -60°C for 2 hours, and martensite should not appear. However, when the alloy composition is inappropriate, different degrees of austenite (γ) to acicular martensite (α) transformation will occur at room temperature or low temperature, and the phase transformation is accompanied by volume expansion effect. The coefficient of expansion of the alloy increases accordingly. The main factor affecting the microstructure stability of the alloy at low temperature is the chemical composition of the alloy. It can be seen from the Fe-Ni-Co ternary phase diagram that nickel is the main element to stabilize the γ phase. A high nickel content is beneficial to the stability of the γ phase. Copper is also an important element to stabilize the alloy structure. As the total deformation rate of the alloy increases, its microstructure tends to be more stable. Alloy composition segregation may also cause γ→α phase transformation in local areas. In addition, the coarser grains will also promote the γ→α phase transformation.
 

Chemical composition

C	P	S	Si	Mn	Cu	Co	Ni	Fe
				0.20	0.40	3.2	31.5
0.05	0.02	0.02	0.02	0.60	0.80	4.2	33.0	allowance

he melting temperature range of 4J32 is 1430~1450ºC.
4J32 thermal conductivity λ=13.9W/(m?ºC).

4J32 Coefficient of linear expansion The standard stipulates that α1(20~100ºC)≤1.0×10-6ºC-1

  4J32 density ρ=8.10g/cm3[1].
4J32 electrical properties

4J32 resistivity ρ=0.77μΩ m

4J32 Curie point Tc=220ºC
At 4000A/m, the residual magnetic induction intensity Br=0.58T, the coercive force Hc=75A/m.

4J32 Chemical Properties The alloy has certain corrosion resistance in the atmosphere, fresh water, and sea water.

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.