Engineering Materials
A small percentage of boron is added to steel in order to

Increase endurance strength
Increase wear resistance
Reduce machinability
Increase hardenability

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Engineering Materials
Inconel contains

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

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