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Monel 405

Alloy 405 (UNS N04405) is a nickel-copper alloy with high strength and toughness. Alloy 405 also has excellent corrosion resistance in a range of media including seawater, hydrofluoric acid, sulphuric acid and alkalis. Due to its increased sulfur content Alloy 405 has enhanced machinability. Alloy 405 is chiefly used for automatic screw machine stock and is not generally recommended for other applications.
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Chemical Composition:

chemical composition of monel alloy R-405

Element

Content,%

Ni

63.0min

Cu

28min~34max

Fe

2.5max

Mn

2.0max

C

0.3max

Si

0.5max

S

0.025min-0.060max


Typical Mechanical Properties:

Condition

Tensile (ksi)

.2% Yield (ksi)

Elongation %

Hardness Brinell (3000 kg)

Hardness Rockwell B

Annealed

70-85

25-40

50-35

110-140

60-76

Hot-Finished

75-90

35-60

45-30

130-170

72-86

Cold-Drawn, As-Drawn

85-115

50-105

35-15

160-245

85-23C


Standard of execution:

Form

ASTM

Rod

B 574

Plate, sheet and strip

B 575

Seamless pipe and tube

B 622

Welded pipe

B 619, B 775

Welded tube

B 626, B 751

Welding fitting

B 366

Forged or rolled pipe flange and forged fitting

B 462

Billet and bar for reforging

B 472

Forging

B 564


Applications of  Monel R-405 :
Alloy R-405 is chiefly used for automatic-screw-machine stock and it not generally recommended for other applications. Screw machine stock for fasteners and similar high production run items.
Meter and valve parts
Fasteners
Screw machine products

Characteristics of Monel 405:
Good machinability and is recommended for use with automatic screw machines
Resistant to seawater and steam at high temperatures
Excellent resistance to rapidly flowing brackish water or seawater
Excellent resistance to stress corrosion cracking in most freshwaters
Particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated
Offers some resistance to hydrochloric and sulfuric acids a modest temperatures and concentrations, but is seldom the material of choice for these acids
Excellent resistance to neutral and alkaline salt
Resistance to chloride induced stress corrosion cracking
High resistance to alkalis


Monel 405
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