Otai Special Steel is 718 steel china supplier and Wholesalers. supply in 718 round bar, plate , flat bar, square. delivery condition can as customer require provide Annealing, Pre-Hardness(28-34HRc), ?black surface or bright milled surface. If you have get a price of?inconel 718 bar stock, ?pls feel free contact us. email: email@example.com
inconel 718?datenblatt Chemical composition as below:
718 tool steel Application
718 steel Usage is same as the mold steel P20 type, but as a result of better hardenability, superior performance, can make size large, high-grade plastic mold forming parts
Add hard processing
For?improve Injection?mould?life up to 800000 times more, can be implemented on pre hardened steel quenching and low temperature tempering and hard way to achieve. In 500-600 ℃ preheat before quenching when 2-4 hours, and then in 850-880 ℃ heat preservation time (at least 2 hours), into the oil cooled to 50-100 ℃ oil air cooling, hardness after quenching can reach 50 to 52 HRC, so as to prevent cracking should be 200 ℃ low temperature tempering processing, immediately after tempering hardness can keep more than 48 HRC .
Nitriding treatment can get high hardness surface structure, surface hardness after nitriding of 650-700 hv
(57 to 60 HRC) die life can reach more than 1 million times, nitride layer with compact structure, smooth features, mould stripping and wet air and alkali corrosion resistance improved.
Quenching and tempering (Q+T)
Quenching temperature 840 ~ 870 ° C, tempering temperature 200 ~ 500 ° C, 50 to 55 HRC hardness
- Physical properties of 718 Tool steel
(sample hardness 340 HBW, at room temperature and under high temperature)
1) temperature is 20 ° C / 200 ° C / 400 ° C, the density of 7. 8 g/cm / 7.75 g/cm / 7. 7 g/cm.
2) the temperature in the 20 ~ 200 ° C / 20 ~ 200 ° C, linear expansion coefficient of: 12.6 x 10 k / 13.5 x 10 k.
3) temperature is 20 ° C / 200 ° C / 400 ° C, thermal conductivity, 29.0 W (m, K), 29.5 W/(m, K) / 31.0 w. (m. K)
4) temperature is 20 ° C / 200 ° C / 400 ° C, modulus of elasticity: 205000 mpa / 200000 mpa / 185000 mpa
- Mechanical properties of 718 plastic mould steel
- Critical temperature
|Temperature (approximation) / ℃||770||825||640||755||335||180|
- Expansion coefficient
|Linear expansion coefficient of /C||11.9×10||12.20×10||12.50×10||12.81×10||13.11×10||13.41×10||13.71×10|
- Thermal conductivity
Grinding inconel 718 also can provided.