Circle 68NKhVKTU - EP578
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| 68NKhVKTYu | EP578 | Delivery from the stock, in stock | |||
| KhN68VKTYU | EP578 | Delivery from the stock, in stock |
Production
Steel for 68NKHVKTU-VI circle is melted in an open arc furnace by induction method. The first stage of the technological process is rolling the ingot at t° 1100 - 800 °C. After deformation, the circle is cooled. In the first variant it is immersed in water, then cooled in air or in oil. The second method involves cooling with a water shower and dwelling for 4.5 hours. After hot rolling, calibration is used, which is necessary to ensure that the outer diameter of the product is as accurate as possible.
Designations
Physical properties of the alloy:
| Description | Designation |
|---|---|
| - The temperature at which the alloy data is obtained [Grad] | - T |
| - Modulus of elasticity of the 1st kind, [MPa] | - E |
| - Coefficient of thermal linear expansion (at 20°C), [1/Grad] | -a |
| - Specific electrical resistance [Ohm-m] -R | -R |
| - Specific gravity [g/cm3] -r | -r |
| - Heat transfer coefficient [W/(m-grad)] -l | -l |
| - Specific heat capacity (at 20°C), [J/(kg-grad) | -C |
Mechanical properties:
| Description | Designation |
|---|---|
| - Ultimate yield strength (yield strength for permanent deformation) [MPa] | sT |
| - Tensile strength [MPa] | sT |
| - Ratio constriction [ % ] | y |
| - Tensile elongation [ % ] | d5 |
| - Brinell hardness, in [MPa] | HB |
| - Impact toughness [ kJ/m2 ] | KCU |
Percentage composition of 68NKHVKTU-VI grinding wheel
| Ni | Cr | V | W | Ce | Si | C | Fe | Mn | P | Ti | Nb | Ce | Co | Al | B | Cu | Ni |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 55.402 - 63.5 | 18 - 20 | up to 0.2 | 9 - 10.5 | up to 0.05 | up to 0.4 | up to 0.05 | up to 1 | up to 0.4 | up to 0.015 | 2.7 - 3.2 | up to 0.2 | up to 0.05 | 5.5 - 6.7 | 1.3 - 1.8 | up to 0.003 | to 0.07 | 55.402 - 63.5 |
weldability:
| Designation | Description |
|---|---|
| limited weldable | - Must be preheated to 100-120°C with subsequent heat treatment |
| no restrictions | - No need for preheating and final heat treatment |
| Difficult to weld | - need for preheating to 200-300°C with final heat treatment |
Application
Equipment and machinery parts for power generation, aerospace and aircraft engineering. The stability of the circle 68NKhVKTU-VI allows its use at t ° 1050 ° C in harsh technological conditions. Therefore, it is well suited for parts of chemical plants, it is widely used in the pulp and paper industry.
Supply
Circle 68NKHVKTU-VI is certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities; the mechanical properties of the product. From us you can buy in bulk a variety of semi-finished products for large-scale production. We also offer good conditions for retail buyers. You will be satisfied with the level of service and responsiveness of service.
Buy at the best price
Evek GmbH has an unlimited assortment of iron-nickel alloys of the highest quality. We offer special alloys at the best price. If you are interested in our offer please contact your nearest office. Qualified specialists will provide all necessary information regarding products, price range, sales conditions. The cost of goods depends on the parameters of products and additional terms of delivery.