By. Terence Bell. Updated on September 02, 2019. Brass is a metal alloy that is always made with a combination of copper and zinc. By varying the amount of copper and zinc, brass can be made harder or softer. Other metals—such as aluminum, lead, and arsenic—may be used as alloying agents to improve machinability and corrosion resistance. 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. Superalloys constitute face-centred cubic nickel as the primary constituent and may be up to a weight per cent of 40 and additions of five to ten other elements. In nickel-based heat-resistant alloys, the nickel weight per cent may be in the range of 37–80. Superalloys can also be manufactured through cast and in powder metallurgy forms. Also, nickel alloys are often used in high-end products, such as jewellery and watches, contributing to their higher cost. Allergies. Some people may also have an allergic reaction to nickel alloys. This is because nickel is a common allergen, and it can cause irritation, redness, and swelling when it comes into contact with the skin. Cupronickel. Cupronickel or copper-nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other elements added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. ( Monel is a nickel-copper alloy that contains a minimum of 52 percent nickel.) Vay Nhanh Fast Money.

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