Description: A nickel-copper alloy with high strength and excellent corrosion resistance in a range of media, including seawater, hydrofluoric acid, sulfuric acid, and alkalies.

Major Applications: Used for marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners, and heat exchangers.

Analysis in Weight Percent:

              Ni (+ Co)             63.0 min                  Cu                28.0 - 34.0

              Fe                        2.5                         Mn                    0.20

              Si                        0.50                         S                     0.024

              C                         0.30

Mechanical Properties (at Room Temperature):

                                                                    MPa             ksi

Ultimate Tensile Strength:                          550              80

Yield Strength (0.2% offset):                      240             35

                                                                 GPa             10⁶ psi

Elastic Modulus (Tension):                       180                 26

Elongation in 50mm (2 in): 40%

Hardness: 110 - 150 HB

Physical Properties (at Room Temperature):

                                                                   ^oC                        ^oF 

Melting Point/Range:                               1300 - 1350      2370 - 2460

Curie Temperature:                                     20-50              70-120

                                                                  J/kg ⋅ K             Btu/lb ⋅ ^oF

Specific Heat:                                                 427                   0.102

                                                                µm/m ⋅ K              µin/in ⋅ ^oF

Average Coefficient of Thermal Expansion:  13.9                        7.7

                                                               W/m ⋅ K           Btu ⋅ in/ft² ⋅ h ⋅ ^oF

Thermal Conductivity:                                21.8                        151

Electrical Resistivity (nΩ ⋅ m): 547

Density (g/cm³): 8.80