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MONEL ALLOY 400

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Super Alloy Monel(r) Alloy 400

Related Metals:

Nicorros(tm)
Silverin 400(tm)
Nickelvac 400(tm)
CM 400(tm)

Specifications:

AMS 4574
AMS 4575
AMS 4675
AMS 4730
AMS 4731
ASTM B127
ASTM B163
ASTM B164 CLASS A
ASTM B165
ASTM B366
ASTM B513
ASTM B564
ASTM F467
ASTM F468
ASTM F96
DIN 2.4360
DIN 2.4366
MIL N-24106
MIL T-1368
MIL T-23520
QQ N281
UNS N04400

Chemistry Data

Carbon

0.3 max

Copper

28 - 34

Iron

2.5 max

Manganese

2 max

Nickel

Balance

Silicon

0.5 max

Sulphur

0.024 max

General Information

Principal Design Features

This alloy of nickel-copper is resistant to sea water corrosion as well as to a variety of acids and other corrosive media.


Applications

Marine fixtures, pumps, valves and piping systems for sea water application. Because of its good corrosion resistance it is also used in chemical plant equipment.


Machinability

Conventional machining techniques used for iron based alloys may be used. This alloy does work-harden during machining and has higher strength and "gumminess" not typical of steels. Heavy duty machining equipment and tooling should be used to minimize c


Forming

This alloy has good ductility and may be readily formed by all conventional methods. Because the alloy is stronger than regular steel it requires more powerful equipment to accomplish forming. Heavy-duty lubricants should be used during cold forming. I


Corrosion Resistance

Resists corrosion from water, including sea water, and resistant to chloride stress-corrosion cracking. Good corrosion resistance to sulfuric acid, hydrochloric acid, hydrofluoric acid, and alkalis.


Welding

The commonly used welding methods work well with this alloy. Matching alloy filler metal should be used. If matching alloy is not available then the nearest alloy richer in the essential chemistry (Ni, Co, Cr, Mo) should be used. All weld beads should


Heat Treatment

Not heat treatable, but may be annealed after cold working.


Forging

No data, however the alloy is readily forged.


Hot Working

No data, but the alloy may be hot worked.


Cold Working

Cold forming may be done using standard tooling although plain carbon tool steels are not recommended for forming as they tend to produce galling. Soft die materials (bronze, zinc alloys, etc.) minimize galling and produce good finishes, but die life is


Annealing

Annealing may be done at 1700 F. A stress-relief anneal may be done at 1050 F for 1 to 2 hours, followed by slow cooling.


Hardening

Hardens due to cold work only.


Physical Data

Density (lb / cu. in.)

0.318

Specific Gravity

8.8

Specific Heat (Btu/lb/Deg F - [32-212 Deg F])

0.105

Electrical Resistivity (microhm-cm (at 68 Deg F))

307

Melting Point (Deg F)

2425

Poissons Ratio

0.32

Thermal Conductivity

167

Mean Coeff Thermal Expansion

7.7

Modulus of Elasticity Tension

26

Mechanical Data

Form

Plate

 

Condition

Test Specimen Annealed

 

Temper

70

 

Tensile Strength

83

 

Yield Strength

39

 

Elongation

42

 

Rockwell

B68

 

   

 

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