Engineering Materials
Tensile strength of steel can be safely increased by

Adding small quantities of copper
Adding carbon up to 6.3%
Adding carbon up to 0.83%
Adding carbon up to 2.8%

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Engineering Materials
Inconel contains

80% nickel and 20% chromium
68% nickel, 29% copper and 3% other constituents
65% nickel, 15% chromium and 20% iron
80% nickel, 14% chromium and 6% iron

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