Typical base materials include steel, aluminium, plastic, copper alloys, and zinc alloys. Most hip replacements consist of cobalt and chromium alloys, or titanium. Wrought and cast aluminium alloys use different identification systems. Cu phases in some aluminium alloys or martensite platlets in steel. The airframe is made of aluminium alloys and composite materials. Several standard alloys of aluminum are used. Kazakhstan has vast deposits of uranium, precious metals, metals, ores, alloys, ferroalloys and minerals. Brazing requires appropriate silver-base brazing alloys. Carbon at 0.1% impairs corrosion resistance of nickel alloys. Common titanium alloys are made by reduction. Structure is made of light alloys, mainly aluminium. Contacts are made of copper or copper alloys, silver alloys and other highly conductive materials. Intermetallic particles form during solidification of metallic alloys. Steel frames are often built using various types of steel alloys including chromoly. It was designed to be manufactured with extensive use of aluminum alloys and synthetic materials.