Properties and uses of different kinds of steel
3 marks · EasyDescribe the compositions of the following types of steel.
Mild steel
High-carbon steel
Stainless steel
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(a) Iron with up to 0.25% carbon
(b) Iron with 0.6–1.2% carbon
(c) Iron with chromium (and usually nickel)
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Marking points
B1 (a) · 1 mark · States that mild steel is iron with up to 0.25% carbon.
B2 (b) · 1 mark · States that high-carbon steel is iron with 0.6–1.2% carbon.
B3 (c) · 1 mark · States that stainless steel is iron with chromium (and usually nickel).
Worked solution
a) Mild steel: Iron with up to about 0.25% carbon.
b) High-carbon steel: Iron with 0.6–1.2% carbon.
c) Stainless steel: Iron with chromium (and often nickel).