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Carbon and low alloy steel castings
These materials are used for a wide range of applications from general engineering applications to creep resistant steels in power stations. The cheaper carbon steels can fulfill a wide range of roles where corrosion resistance is not a particular requirement.
The addition of small quantities of manganese results in acceptable low temperature properties down to –46C. Additions of small amounts of chromium, nickel and molybdenum result in alloy steels with increased strengths to 1000 MPa and good toughness following a water quench heat treatment.
Air cooled steels with chromium and molybdenum (typically 2.25% chromium, 1.0% molybdenum) are used extensively in the power generation industry for their creep properties.