Engineering Materials
The hardness and tensile strength in austenitic stainless steel can be increased by

Martempering
Hardening and cold working
Normalizing
Full annealing

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Engineering Materials
Cyaniding is the process of

Dipping steel in cyanide bath
Obtaining cyanide salts
Reacting steel surface with cyanide salts
Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness

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