How Much Does CuNi3 Copper Nickel Alloy Plate Cost Per Kilogram?

CuNi3 copper-nickel alloy (97%Cu+3%Ni) has become a core material for marine engineering and aerospace with its 8.8g/cm3 density,
≥
500MPa tensile strength and excellent corrosion resistance. The market price is stable at USD16.5-USD28./KG. The selection needs to balance environmental adaptability and cost, and avoid excessive pursuit of purity or neglect of processing technology.

Analysis of the price and technical characteristics of CuNi3 copper-nickel alloy plate

CuNi3 is a high-performance copper-nickel alloy. Due to its excellent corrosion resistance, high strength and good processing performance, it is widely used in marine engineering, petrochemical, aerospace and other fields. This article will comprehensively analyze the price and application characteristics of CuNi3 copper-nickel alloy plate from the aspects of technical parameters, industry standards, and material selection misunderstandings.

I. Technical parameters of CuNi3 copper-nickel alloy plate

The main components of CuNi3 alloy are copper (Cu) and nickel (Ni), of which the nickel content is about 3%. This ratio gives the alloy unique physical and chemical properties. The following are the main technical parameters of CuNi3 plates:

Chemical composition: Cu (97%) + Ni (3%) + trace impurities.

Density: 8.8g/cm³.

Tensile strength: ≥500MPa.

Yield strength: ≥250MPa.

Elongation: ≥30%.

Corrosion resistance: Excellent performance in marine environment, high temperature and high humidity conditions.

Thermal conductivity: about 230W/m·K.

Electrical conductivity: about 70%IACS.

II: Industry standards and performance requirements

The performance of CuNi3 copper-nickel alloy must comply with relevant international and domestic standards. The following are two commonly used industry standards:

ASTMB369: This standard specifies the chemical composition, mechanical properties and process requirements of copper-nickel alloy plates. CuNi3 alloy must meet the classification requirements for Cu-Ni alloys in ASTMB369.

AMS4676: This standard is a commonly used material standard in the aerospace field, which puts forward strict requirements on the chemical composition, heat treatment and surface quality of copper-nickel alloys.

III: Price analysis of CuNi3 copper-nickel alloy plate

The price of CuNi3 alloy is affected by many factors, including raw material price fluctuations, market supply and demand, and the complexity of processing technology. The following is the current market situation:

International market price: According to LME (London Metal Exchange) data, the average price of copper-nickel alloy is about US$150-200 per kilogram, and the specific price depends on the alloy purity and market supply and demand.

Domestic market price: Shanghai Nonferrous Network data shows that the price of domestic CuNi3 plate is about RMB 120-180 per kilogram, which is basically the same as the international price.

IV: Common misunderstandings in material selection

When selecting CuNi3 copper-nickel alloy plate, users often make the following mistakes:

Ignoring environmental adaptability: CuNi3 alloy is suitable for use in highly corrosive environments, but in dry or non-corrosive environments, it is more reasonable to choose lower-cost brass or bronze.

Excessive pursuit of high purity: Although high-purity CuNi3 alloy has better performance, its cost is also significantly increased. For some application scenarios, moderately reducing the purity can meet the needs.

Ignoring processing performance: CuNi3 alloy has good processing performance, but if the rationality of the processing technology is ignored, it may lead to material waste and cost increase.

V: Technical controversy: Balance of high temperature performance

The performance of CuNi3 alloy at high temperature is a technical controversy. Some studies have shown that the strength and corrosion resistance of CuNi3 may decrease under high temperature environment, especially in oxidizing medium. According to GB/T2097-2017 standard, CuNi3 alloy can still maintain good mechanical properties in an environment below 300℃. This controversial point needs to be weighed according to the specific application scenario.

VI: Material selection suggestions

Clear application scenario: Select the appropriate alloy type according to the corrosiveness and temperature conditions of the use environment.

Economic evaluation: Under the premise of meeting performance requirements, comprehensively consider material cost and processing cost.

Supplier qualification: Select suppliers with industry qualifications to ensure that the materials meet relevant standards.

VII: Summary

As a high-performance material, the price of CuNi3 copper-nickel alloy sheet is affected by many factors, but its excellent performance makes it have important application value in many fields. In the process of selection and use, it is necessary to comprehensively consider technical parameters, industry standards and economic efficiency to avoid common misunderstandings. In the future, with the advancement of technology and market development, the application prospects of CuNi3 alloy will be broader.