N690, as a new type of super corrosion resistant high strength die steel, is a new type of cobalt-Mo-vanadium martensitic stainless steel produced by electroslag resolution (ESR) technology.
N690 die steel is often used to harden tools and high-strength components due to its excellent die properties such as super corrosion resistance, high strength and high hardness. Such as making corrosion-resistant bearings, corrosion-resistant medical instruments, optical products, hardening tools and other fields.
N690 die steel supply form: rolled material, finishing, fine grinding
N690 application
Belo N690 corrosion-resistant mirror die steel is treated with ESR technology to make its microstructure more pure and fine, which is ideal for hardened tools and high-strength components.
Its applications are as follows:
Suitable for corrosion resistant bearings
High precision nozzle, valve, piston
Cutting instrument
Hardening of the cutting tool
Refrigeration equipment
Encapsulation moulds
Physical properties
Temperature 20 ℃ 200 ℃
Density kg/ Dm3 770 --
Elastic coefficient N/mm2 223000 209000
Thermal expansion coefficient from 20℃ -- 10.8 x 10-6
Thermal conductivity W/MK 15 --
Specific heat J/kg℃ 430 --
Mechanical properties of N690 high strength die steel at room temperature
State hardness HB/HRC
Soft annealing to 285HB
Hardening of 60-62 HRC
Annealed and tempered 58-60 HRC
N690 high strength die steel heat treatment
BohlerN690 (440C MOD) chemical composition %
C Cr Mo V Si Co Mn
1.07 17.00 1.1 0.1 0.4 1.5 0.4
