Copper nickel alloy Monel 400 - Heanjia Super-metals Co., Ltd.

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Copper nickel alloy Monel 400

Copper nickel alloy Monel 400 is is a solid-solution alloy that can be hardened only by cold working. Copper nickel alloy Monel has high strength and toughness over a wide temperature range and excellent resistance to many corrosive environments.

Firstly, les us get a knowledge in Monel 400 chemical composition:

Element	Content,%
Ni	63.0min
Cu	28min~34max
Fe	2.5max
Mn	2.0max
C	0.3max
Si	0.5max
S	0.024max

Physical and Mechanical Property:

Density, g/cm³	8.83
Melting Range, °C	1300-1390
Tensile strength Rm N/mm²	480
Yield strength R P0. 2 N/mm²	170
Elongation A 5 %	35

Monel alloy 400 has excellent mechanical properties at subzero temperatures. Strength and hardness increase with only slight impairment of ductility or impact resistance. The alloy does not undergo a ductile-to-brittle transition even when cooled to the temperature of liquid hydrogen. This is in marked contrast to many ferrous materials which are brittle at low temperatures despite their increased strength.

With regard to the hardness, here provided:

Hardness of Cold-Rolled Monel Alloy 400 Sheet and Strip

Temper	Rockwell B Hardness
Temper	Sheet	Strip
Deep-Drawing and Spinning Quality	76 max.	76 max.
Annealed	73 max.	68 max.
Skin-Hard	-	68-73
Quarter-Hard	73-83	73-83
Half-Hard	82-90	82-90
Three-Quarter-Hard	-	89-94
Hard	93 min.	93-98
Spring	-	98 min.

Bearing Strength

It is possible, in riveted joints, for failure to occur by tearing out a segment of sheet instead of by shearing the rivet. The resistance of sheet metal to this deformation is known as bearing strength. It can be evaluated by using a hard pin or rivet to enlarge or tear a hole in a sample of sheet metal. The maximum load for tearing out the hole and the load required for a permanent enlargement of the hole diameter by 2% were determined and calculated as ultimate and yield strengths, respectively, in bearing.

Impact Strength

MONEL alloy 400 is notable for its toughness, which is maintained over a considerable range of temperatures. Attempts to produce fractures in the torsion specimens by reducing the minimum area by 75% were not successful because of the toughness of the material.

Appliation field are as follows:

1.Sulfuric acid and hydrochloric acid environment

2.Crude distillation

3.Sea-water in the use of equipment and propeller shaft

4.Seamless water pipe in the power factory

5.Sea-water exchanger and evaporator

6.Nuclear industry and used in the manufacture of uranium enrichment isotope separation equipment

7.Manufacturing hydrochloric acid equipment used in the production of pump and valve

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