Ni Based Alloy

Nickel-based alloy refers to a type of alloy that has comprehensive properties such as high strength and certain resistance to oxidation and corrosion at high temperatures of 650 to 1000°C.

 

According to the main properties, they are divided into nickel-based heat-resistant alloys, nickel-based corrosion-resistant alloys, nickel-based wear-resistant alloys, nickel-based precision alloys and nickel-based shape memory alloys.

 

High-temperature alloys are divided into iron-based high-temperature alloys, nickel-based high-temperature alloys and cobalt-based high-temperature alloys according to different substrates. Among them, nickel-based high-temperature alloys are referred to as nickel-based alloys.

 

 

Element	Min	Max
Nickel + Cobalt	63	70
Manganese	2.0	2.0
Silicon	.50	.50
Cobalt	1.00	1.00
Iron	2.5	2.5
Sulfur	.024	.024
Carbon	.30	.30
Copper	Balance	Balance

 

 

Nickel-based alloys are used in many fields, such as:

1. Ocean: marine structures in the marine environment, seawater desalination, seawater aquaculture, seawater heat exchange, etc.

2. Environmental protection field: flue gas desulfurization equipment for thermal power generation, wastewater treatment, etc.

3. Energy field: atomic power generation, comprehensive utilization of coal, wave power generation, etc.

4. Petrochemical industry: oil refining, chemical equipment, etc.

5. Food field: salt production, soy sauce brewing, etc. In many of the above fields, ordinary stainless steel 304 is not competent. In these special fields, special stainless steel is indispensable and cannot be replaced. In recent years, with the rapid development of the economy and the continuous improvement of the level of the industrial field, more and more projects require higher-grade stainless steel. With the growth of demand for nickel-based alloys in various industries. In 2011, my country's nickel-based alloy market reached 23.07 billion yuan, with a year-on-year growth rate of 19.47%. Therefore, the industry development level is on a steady upward trend.

 

 

• Has good corrosion resistance in acids and alkalis and is most useful under reducing conditions.
• Excellent resistance to caustic alkalis, including in the molten state.
• The material shows good resistance to acidic, alkaline and neutral salt solutions, but severe corrosion occurs in oxidizing salt solutions.
• Withstands all dry gases at room temperature and can be used in dry chlorine and hydrogen chloride at temperatures up to 550C.
• Resistance to inorganic acids varies depending on temperature and concentration and whether the solution is aerated. It has good corrosion resistance in degassed acid.
• Chlorate is virtually unaffected by interparticle attack above 315°C and must be kept to a minimum.

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