2.0 The Alloys There are two main grades of copper-nickel alloy used in marine service - 90-10 (10% nickel) and 70-30 (30% nickel). The 70-30 alloy is stronger and has greater resistance to seawater flow; but 90-10 will provide good service for most applications and, being less expensive, tends to be more widely used.
Yes, all gold alloys contain nickel. As mentioned above, pure gold in its natural form is too soft to be used in jewelry, which means that it has to be mixed with other metal alloys to make it stronger. 10K gold is one of the lower purity pieces of gold, and it only has 42% pure gold; the rest is made of other metal alloys. One of the metals Dental alloys containing nickel, cobalt and/or chromium are widely used for dental restorations. Ni-Cr alloys contain generally 69–81% nickel, whereas Co-Cr alloys contain mostly less than 1% of nickel. The main components of these alloys are Co (60–65%), Cr (27–30%) and Mo (5–6%). Another group of non-precious dental alloys are The higher resistivity in alloys as compared to the constituents is caused by an additional scattering mechanism of the electrons called "alloy scattering". The reason for this is that the atomic ions of the different constituents in an alloy are, in general, not periodically arranged in the crystal lattice but their relative concentrations Nickel-Chromium Alloys. High nickel chromium alloy steels have been successfully used in the manufacture of piston heads for high-speed two stroke engines where the maximum temperature in the head of the piston is around 900°C. From: Alternative Fuels and Advanced Vehicle Technologies for Improved Environmental Performance, 2014. View all Topics. N6Zgro.