Chem.the composition of heat-resistant steel wire marks 20H23N18 regulated by GOST 5632−72. This steel is smelted in open electric arc furnaces, which ensures a minimum content of harmful impurities. It has a complex alloy composition contains chromium — 22−25% Nickel — 12−15% molybdenum — 0.35 to 0.55% of manganese and 0.2% carbon — 0.2%, silicon — 1%, additives of phosphorus and sulfur — hundredths of a percent. The wire is rolled at a temperature of 1150−1180°C at the beginning of the process and at 850 °C at the end. If necessary, it can be tempered with 1100ºС with further cooling in water or air. This heat treatment promotes the normalization of internal stresses and to increase the strength characteristics.
The surface of the wire is not susceptible to oxidation during long-term operation in conditions of high temperature. This wire is plastic, which makes it popular in the manufacture of domestic and industrial appliances. It is resistant to oxidizing atmosphere, to an atmosphere of ammonia and nitrogen. Its main drawback is that the wire has no resistance in the atmosphere of sulfur compounds and sulfur. It has a high cost, because of the high cost of the main components — Nickel.
Properties 20H23N18 wire at 100°C
— temperature coefficient or linear expansion is 12.2 [1/Deg].
— modulus of elasticity equal to 2,19 MPa.
— thermal conductivity of not more than 14.6 W/(m·deg).
— wire density of 8.38 g/cm3, when the temperature slightly changes.
the resistivity is equal to 1.1 Omhm2/m.
Wire marks 20H23N18 has a wide demand in the electric furnace heaters for almost all areas of industry. For example, in kilns drying and calcination, electric furnaces, heating effect, household appliances. This wire is used in a rheostat and resistor elements, as well as in the production of vacuum devices, soldering of high reliability. It can also be used as a cutting and a heating element in thermal packaging knives, industrial and domestic with hot-air heating and water heating systems. In the production of coils length of wire is determined based on the required power. Thanks heat resistance, it is used in a number of aggressive media as a chemically resistant alloy. The most widespread use of this wire finds in petrochemical engineering.
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A diverse range of iron-Nickel rolled stock LLC «AVEK global» allows you to purchase all the necessary products in one place. Quality wire marks 20H23N18 ensured by strict observance of all technological norms of production. The timing of orders is minimal. If you have any questions, you will receive detailed advice from experienced managers. Wholesale customers the company provides discounts.