NAS690 Precipitation Hardening Stainless Steel Bar
NAS690 Ni-based alloy is a nickel-based alloy with Ni-Cr as the main component. NAS690 contains about 30% anti-oxidant Cr, which is both corrosion-resistant and heat-resistant. It is widely used in zero Components, high-pressure steam generating equipment, devices. NAS690 Ni-based alloy shows good corrosion resistance in many media. The high concentration of chromium not only makes NAS 690 alloy highly oxidizing and corrosion-resistant. NAS 690 can also play a role of anti-corrosion in nitrogen-containing compounds and acidic substances containing hydrogen and fluorine. Especially in the 98.5% concentration of the acidic environment is not eroded, and even 150 ℃ high temperature is still intact.
NAS690 Ni-based alloy chemical composition:
C ≤ 0.05,
Mn ≤ 0.5,
Ni ≥ 58.0,
Si ≤ 0.5,
S ≤ 0.015,
Cr 27.0-31.0,
Cu ≤ 0.5,
Iron (Fe) 7.0 ~ 11.0
NAS690 nickel-based alloy physical properties:
Density g / cm3: 8.2
Specific heat J / (kg * k): 450 (20 ° C)
Fixed resistance μΩ * cm: 115
Thermal conductivity w / m * k: 12.0
Average coefficient of thermal expansion 10-6 / ℃:
20 to 100 ° C 14.1
20 to 200 ° C 14.3
20 to 300 ° C 14.5
20 ~ 400 ℃ 14.8
Elastic coefficient N / mm-2: 21.5 * 10-4
Magnetic: None
Melting point ℃: 1345 ~ 1375
NAS690 nickel-based alloy mechanical properties:
Tensile strength N / mm-2: 586
Yield strength N / mm-2: 240
Elongation%: 30
NAS690 nickel-based alloy Applications:
Compared to high-quality mechanical materials, the NAS 690 is resistant to both wet and high-temperature corrosion and makes it excellent in many applications.
NAS690 nickel-based alloy Typical application areas:
Radioactive waste treatment equipment;
Parts inside the steam generator for pressurized water reactors;
Parts of alkali-metal-curing furnaces;
Heavy oil burning furnace parts;
Production of glass and silicate products machine.