10) List five important alloys, their composition and uses.
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1) high carbon steel- used in railroad tracks and heavy machinery-2.1%carbon and iron qs
2)stainless steel- used in cutlery and many 'asthetical' parts-16-26% chromium and 6-22% nickel and iron qs
3)brass- used in bullet casings and many more-around-15-25%zinc and copper qs
4)60-40 solder- used for connecting electrical component permanently- 40% tin and 60% lead
5) nichrome-used as heating element in iron boxes and immersion heaters- 20% chromium and 80%nickel
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