Monel 400

Description:

Monel is a group of nickel alloys, composed mostly of nickel (up to 67%) copper and lesser amounts of iron, manganese, carbon, and silicon. It is stronger than pure nickel. Monel alloys are resistant to corrosion by many agents, including rapidly flowing seawater, hydrofluoric acid, sulfuric acid, and alkalies.

Monel can be fabricated readily by hot- and cold-working, machining, and welding. Major Applications are uses in marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners, and heat exchangers.

It is a relatively alloy, with cost ranging 5 to 10 times the cost of copper and nickel, thus it's use is limited to those applications where it cannot be replaced with lower cost alternatives.

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