Nickel alloys

General characteristics

The main quality nichrome directly related to its chemical composition. Moreover, the importance is not only the presence of a particular element in the alloy composition, but also its percentage of the other components. Therefore, the correct selection of material for certain purposes it is necessary to know the most important qualities of all types of nichrome.

Percentage composition

Alloy C Al Fe Ni Cr Mn P Ti Si S
CR20NI80 ≤0,1 ≤0,2 ≤1,5 72,7−79,1 20−23 ≤0,7 ≤0,03 ≤0.3 mm 0,9−1,5 ≤0,02

Percentage composition

Alloy C Al Fe Ni Cr Mn P Ti Si S
H15N60 ≤0,15 ≤0,2 The 17.3−29,2 55−61 15−18 ≤1,5 ≤0,03 ≤0.3 mm 0,8−1,5 ≤0,02

Particularly significant parameters that determine the industrial value of some grades of this material are presented in the table.

Feature Brand nichrome
Х20Н30 Х20Н35 H15N60-H CR20NI80-H
Chemical composition Nickel 30−34 34−37 55−61 The rest
Chrome 18−21 18−21 15−18 20−23
Iron The rest The rest The rest Less than 1
Carbon less than 0.06 less than 0.06 less than 0.06 less than 0.06
Silicon 1−1,5 1−1,5 1−1,5 1−1,5
Manganese less than 0.06 less than 0.06 less than 0.06 less than 0.06
Sulfur less than 0.015 less than 0.015 less than 0.015 less than 0.015
Phosphorus At least 0,020 At least 0,020 At least 0,020 At least 0,020
Titan Less than 0.2 Less than 0.2 Less than 0.2 Less than 0.2
The maximum temperature for continuous operation ◦C 1100 1100 1150 1200
The electrical resistance (specific) Омхмм2/m Of 1.04 1 1,12 Of 1.09
The density of the material g/cm3 7,9 7,9 8,2 8,4
The thermal conductivity W/ (m*K) 43,8 43,8 45,2 60,3
The coefficient of linear expansion 10 to the minus sixth power / ◦C 19 19 17 18
The value of the melting temperature ◦C 1390 1390 1390 1400
The maximum elongation at break (%) Less than 20 Less than 20 Less than 20 Less than 20
The type of material austenite austenite austenite austenite
Magnetic properties Mild Mild No No

Data specifications will help to choose the appropriate alloy for each specific objective, depending on the conditions of operation of the unit, as well as the availability in the work area for additional hazards. After all, a rational selection of raw materials and cost-effective selection of raw materials for the manufacture of products, is one of the main guarantees of success of any industrial project.

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