Mechanical Properties
Nominal Composition, % ------------------------------------------------
------------------------------- Hardness 0.1% Proof Stress UTS
Materials Cu Ni Fe Mn Others (DPN) (N/mm2) (N/mm2)
90/10 Copper-Nickel-Iron 88 10 2 1 70 110 310
80/20 Copper-Nickel-Manganese 80 20 0.5/0.50 75 110 340
even at ordinary temperatures, with or without work-hardening effects.
In the form used for chemical plants, the purity of the metal is almost
complete; small amounts of alloying additions in lead are intended to
improve its mechanical properties without any significant decrease in
corrosion resistance.
There are three standard leads available in the U.S. for process plant construction