95X18 - эи229 wire, round
Stainless chrome steel 95X18 is made in accordance with the following GOST 5632−72; 5949−75 and 4405−75, as well as technical conditions: 14−1-4628−89 and 14−1-1848−75. Alloy 95X18 made varietal and flat steel by forging or rolling. Hot deformation performed at a temperature of from 950 to 1130 °C, followed by aging at a temperature of 750 °C and cooled. This steel in the hardened state is used in the production of parts with high hardness: bushings, bearings, knives, etc.
The chemical composition of the alloy 95X18
|DOS.||From 17 to 19||From 0.9 to 1||≤0,8||≤0,03||≤0,8||≤0,03|
This steel belongs to the class of martensitic alloys. It is smelted in open electric arc and induction furnaces and in vacuum-induction furnaces with subsequent vacuum arc remelting. The quality of the products of grade 95X18 normalized state standards. Annealing is performed at a temperature of 1045 °C and leave 200 °C. After hardening is hardening as the result of the martensitic transformation, and the hardness reaches 197−207 N. V. the Increase of quenching temperature increases the proportion of residual austenite. The maximum hardness is reached at a temperature of 1050 °C. the Structure of granular pearlite gives steel annealing, Hot deformation is carried out in the temperature range 1130 — 950 °C. the blanks produced with the help of rolling a varietal — drawing. In the process of rapid cooling, the formation of cracks.
Physical properties at 20°C
— Specific gravity of 7.75 g/cm3
— Specific heat 0,483 · 103 j/(kg · K)
— Modulus 18 · 10— 4 N/mm2
— Specific electrical resistivity of 0.68 Omhm2/m
— The hardness of the steel is 200 MPa -1 NV.
— Conductivity 0,243 · 102 W/(m · K)
— Magnetic permeability in a field of 500 e равна1,255 micro Tesla/m.
The corrosion rate
— in humid atmosphere saturated NH3 and H2 S2, up to 0.005 mm/year;
-in solution, H2 S2 at saturation 2.5 g/liter — to 0,0135 mm/year;
— in an aqueous solution of NH3, the rate of corrosion at t° 20 °C to 0.006 mm/year; at 90 °C — to 0,097 mm/year;
— in a mixture of aliphatic hydrocarbons at a temperature of 20−90°C to 0,003 mm/year;
This alloy is widely used in engineering and metallurgy. After hot deformation, followed by aging at a temperature of 750 °C and cooling is achieved by hardening, which allows to produce parts with high hardness: bushings, bearings, knives and other Products made from this steel meet the highest requirements for corrosion resistance, they are able to withstand repeated heat treatment that is necessary for medical instruments. You can process them in the washing machines, they do not lose their properties in chlorinated water.
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