What are the application differences between pure nickel alloys N2, N4, N6, N8 and DN?
I. Overview
Pure nickel shows good corrosion resistance in many acidic and alkaline environments, and is mostly used in reducing media. It is particularly resistant to alkali corrosion and is relatively stable at high temperatures or in molten alkali, so it is mainly used in the alkali production industry. At room temperature, nickel is most stable in seawater, methane solutions and organic media (such as fatty acids, phenols, alcohols, etc.). It is not resistant to inorganic acid corrosion and is unstable in acetic acid and formic acid.
2. Characteristics:
The biggest feature of nickel is its resistance to corrosion in alkaline media, such as caustic potassium, caustic soda, etc. This is widely used in the ion membrane caustic soda process. Compared with most alloys, nickel has good corrosion resistance in dry fluorine. . Nickel has also been successfully used in dry chlorine and hydrogen chloride at room temperature to 540°C.
Can also be used in static hydrofluoric acid solutions. It has excellent mechanical properties and excellent corrosion resistance, high thermal and electrical conductivity, low gas content and vapor pressure.
Nickel has good mechanical properties over a relatively wide temperature range, is easy to cold work, and has processing characteristics similar to low carbon steel.
3. Purpose:
Connecting pieces, lugs, leads, cutoff pieces, nickel metal hydride batteries, lithium batteries, lugs, power tools in rechargeable battery packs
Combined batteries, polymer batteries, power batteries, electronic industry, laptop computers, mobile phones, cordless power tools, electric bicycles
Electric mopeds, pagers, MP3s, digital cameras and video recorders, nickel-cadmium, nickel-metal hydride, nickel batteries, combined batteries and instruments
Telecommunications, electric vacuum, special light bulbs, etc.
4. Corrosion resistance
It is particularly resistant to alkali corrosion and is relatively stable at high temperatures or in molten alkali, so it is mainly used in the alkali production industry.
At room temperature, nickel is most stable in seawater, methane solutions and organic media (such as fatty acids, phenols, alcohols, etc.). Impatient
It corrodes with organic acids and is also unstable in acetic acid and formic acid.
N4/N6 nickel belt grades in the United States: N4, N6 correspond to Ni201 and Ni200 in ASME II, that is, low carbon pure nickel and ordinary pure nickel (i.e. N4, Ni201, N6, Ni200).
Nickel strip execution standard: N4/N6 pure nickel strip production execution standard GB/T2072-2007
Nickel belt status (Vickers hardness): hard (Y), semi-hard (Y2), 1, 4 hard (Y4), soft (M).
Nickel strip specifications: Broadband: 2~330mm Thickness: 0.05~1mm Length: >=3000mm
The packaging, marking, transportation and storage of nickel strips are in accordance with GB88888.
Nickel strip purity: above 99.95%
Characteristics of nickel strip: good gloss, ductility, and weldability
The difference between N4 and N6 pure nickel belts: The difference between N4 and N6 lies in the C content: low carbon pure nickel and ordinary pure nickel respectively.
N4 and N6 correspond to Ni201 and Ni200 in ASME II, that is, low carbon pure nickel and ordinary pure nickel.
(i.e. N4/Ni201, N6/Ni200)
N4 Ni%=99.9%, C%=0.01%Max,
N6 Ni%=99.5%-99.6% C%=0.10%Max
According to GB2054-2005, the difference between N4 and N6 is:
1. Chemical composition, N4 C content is less than 0.02%, N6 C content is less than 0.15%, and the other element contents are the same;
2. Mechanical properties, in M state, N4 Rm≥350MPa, N6 Rm≥380MPa
Note: N4 and N6 are as shown above. The main difference is the C content. N4 is called low-carbon pure nickel, and the other element contents are the same. Due to the low carbon nature of N4, it is suitable for use in some specific situations, so it is best to communicate with customers. Use the environment or purpose to avoid unnecessary trouble.
Pure nickel belt: The nickel content is more than 99.95%. Pure nickel has excellent mechanical properties and high corrosion resistance in a variety of different environments. It also has magnetostrictive and magnetic properties, high heat conductivity, and high Characteristics include electrical conductivity, low gas volume and low vapor pressure. It has good spot welding performance, high tensile tension and easy operation. Low resistivity (selected for notebook battery pack combinations) can pass a current of more than 50A, making it the first choice for power battery pack combinations. This product is mainly used in the manufacturing of nickel metal hydride batteries, lithium batteries, combined batteries and power tools, communications information, special lamps and other industries. .
