Production and Application
Stainless chromium steel 95X18 smelted in an open electric arc or induction furnaces. Production is regulated by GOST 5632−72; 4405−75 and 5949−75; and TU: 14−1-1848−75 and 14−1-4628−89. Band-pass and high-grade steels are manufactured by forging or rolling. Hot deformation is carried out at 1130−950 ° C, followed by holding at 750 ° C and cooling. Applied to the manufacture of parts with high hardness: bushings, bearings, knives, etc…
The percentage of soglvno 5732−72
Physical quality at 20 ° C.
Density 7.75 g / cm3, the thermal conductivity of 24.3 W / (m · K); specific heat capacity of 0.483 · 103 J / (kg · K
Temperature coefficient of linear expansion and
|steel grade||From 20 to 100||From 20 to 200||From 20 to 300||From 20 to 400||From 20 to 500||From 20 to 800|
After quenching and low temperature tempering up to 400 ° C has a satisfactory resistance to corrosion in 3% sodium chloride solution and water. At holiday 480−500 ° C resistance to corrosion is lost due to precipitation of carbides.
Steel belongs to the martensitic class. After complete annealing steel structure ledeburite with excess carbides. Microstructure of steel, hardened to 900−1250 ° C, includes martensite, austenite and carbides.
Effect of quenching on the properties tº 90H18MF (numerator) and 95X18 (the denominator)
|tzak||The residual austenite γ,%||Hardness HRC||The content of chromium (Cr) in solid solution,%||Austenite grain diameter, m|
|900 ° C||<1||47||9.5||18|
|1000 ° C||-||55/55||-||16|
|1050 ° C||26/17||57/58||eleven||40|
|1100 ° C||— / 32||54/55||12.2||-|
|1150 ° C||76||40||-||35|
|1200 ° C||-||-||42||33|
|1250 ° C||93||26||16.4||63|
Influence of annealing temperature on the properties 90H18MF (numerator) and 95X18 (denominator) (quenching process 1040 ° C)
|totp, ° C||Hardness HRC||The residual austenite γ,%||totp, ° C||Hardness HRC||The residual austenite γ,%|
|140||57/56||17/15||670||33 / -||0 / -|
|300||52/51||12/12||750||27 / -||15/-|
|500||55 / -||-||900||60 / -||0 / -|
|600||40 / -||-||-||-||-|
For 90H18MF after oil tempering process at 1040 ° C (30 min), the critical points are: Ac1 = 840 ° C, Ac3 = 925 ° C; Mn = 260 ° C; MC = 135 ° C. Due to the stability of the austenite after quenching from 1250 ° C phase transitions do not occur. Recommend quenching temperature 1050 ° C and tempering 150−200 ° C. To mitigate complete (~ 220 HB) is carried out annealing at 880−920 ° C with minimal cooling rate (25 ° C / h). To improve the machinability in turning using annealing at 730−760 ° C. Not recommended tempering at 450 to 600 ° C and t ° quenching above 1065 ° C, which causes grain growth and decrease toughness.
Presented 95X18 rental brand certified. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk, any semi-finished products for large-scale productions. We also offer optimal conditions for retail customers. High level of service and efficiency of service are the face of our company.
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In stock company «Elektrovek-steel» always available products from stainless steel alloys for the best price. It is formed with European rates on non-ferrous metals without the inclusion of the additional costs. We supply certified products of domestic and foreign manufacturers. Cooperation with us gives a number of advantages. Our experts will be happy to provide advice when buying any alloys, the correct choice of which will depend on the performance and durability of the equipment. We will help you determine not only the optimum parameters of the product, but also offer the best price.