Monel

Monel Fasteners

A Ni-Cu alloy with high strength and good corrosion resistance

Monel Fasteners for Saltwater Resistance

  • Excellent resistance to hydrofluoric acid

  • Excellent resistance to sea water for marine applications

  • High strength metal with good toughness at high temperatures

  • In-depth information on grades 400 and K500

  • Datasheets available for Monel 400 and Monel K500

Monel® fasteners, like Monel 400 and K500, are made from a nickel-copper alloy and exhibit high strength, toughness and good corrosion resistance over a wide temperature range from cryogenic up to 1000°F. An outstanding characteristic of Monel fasteners is that they offer exceptional resistance to hydrofluoric acid, a particularly tough acid to deal with, in all concentrations up to the boiling point. For hydrofluoric acid applications Monel fasteners are perhaps the most resistant of all commonly used specialty alloys.

Monel alloy 400 & K500 fasteners also exhibit excellent corrosion resistance in marine applications and have reasonable corrosion resistance to sulfuric and hydrochloric acids under reducing conditions.

Because of these characteristics, Monel fasteners are often found in marine and chemical processing applications.

The most common grades of Monel fasteners  are Monel 400 (2.4360) and Monel K500 (2.4375) . Gain more insight on these two nickel alloy grades by accessing our Monel 400 and K500 overviews or by contacting our engineering experts.

Resources: Monel Torque Spec, Monel 400, Monel K500

Monel Fastener Types: Bolts, Nuts, Screws, Threaded Rods, Washers


Common Grades of Monel Fasteners

Monel 400 (2.4360)

Monel 400, UNS N04400 (QQ-N-281), is a nickel-copper alloy with high strength and excellent corrosion resistance in a range of media including sea water, hydrofluoric acid, sulfuric acid, and alkalies. Monel 400 is commonly in marine engineering, chemical and hydrocarbon processing applications.

Monel 400 (2.4360) Specifications: BS3075NA13 (Wire), BS3076NA13 (Bar), ASTM B 164 (Rod, Bar, and Wire), ASTM B 564 (Forgings), ASME SB 164 (Rod, Bar, and Wire), ASME SB 564 (Forgings), AECMA PrEN 2305 (Wire for Rivets), SAE AMS 4675 (Bars and Forgings), SAE AMS 4730 (Wire), SAE AMS 4731 (Wire and Ribbon), DIN 17752 (Rod and Bar), DIN 17753 (Wire), DIN 17754 (Forgings), VdTÜV 263 (Sheet, Plate, Bar, and Tubing), QQ-N-281 (Plate, Sheet, Strip, Bar, Rod, Wire, and Forgings), Werkstoff 2.4360, ASTM F467 (Nuts), ASTM F468 (Bolts, Screws, Studs)

Monel 400

Ni+Co

Cu

Fe

Mn

Si

C

S

Min %

63

28.0

-

-

-

-

-

Max %

-

34.00

2.50

2.00

0.50

0.30

0.024

Monel K500 (2.4375)

Monel K500, UNS N05500 (QQ-N-286),  is a precipitation-hardenable nickel-copper alloy that combines the corrosion resistance of Monel alloy 400 with greater strength (over 2x as strong) and hardness. It also has low permeability and is nonmagnetic to temperatures as low as -150°F (-101°C). 

Monel K500 (2.4375) Specifications: BS3075NA18 (Wire), BS3076NA18 (Rod and Bar), ASTM B 865 (Rod and Bar), DIN 17752 (Rod and Bar), DIN 17753 (Wire), DIN 17754 (Forgings), QQ-N-286 (Rod, Bar, Wire, and Forgings), SAE AMS 4676 (Rod and Bar), ASME Code Case 1192 (Rod and Bar), ISO 9723 (Bar), ISO 9724 (Wire), ISO 9725 (Forgings), Werkstoff 2.4375, ASTM F467 (Nuts), ASTM F468 (Bolts, Screws, Studs)

Monel K500

Ni+Co

Cu

Fe

Mn

Si

C

S

Al

Ti

Min %

63

27.0

-

-

-

-

-

2.30

0.35

Max %

-

33.00

2.00

1.50

0.50

0.25

0.010

3.15

0.85

         


MONEL 400 - Tensile Data


Temperature (°F)

Ultimate Tensile (ksi)

Yield Strength at

0.2% Offset (ksi)

Elongation %

Room Temp.

83

32

45

200

79

30

43

400

77

27

42

600

80

27

46

800

68

26

48

1000

54

24

40



MONEL K500 - Tensile Data


Temperature (°F)

Ultimate Tensile (ksi)

Yield Strength at

0.2% Offset (ksi)

Elongation

%

Room Temp.

160

110

45

200

150

108

47

400

147

105

48

600

142

103

49

800

125

102

19

1000

95

90

8


PRESSURE - TEMPERATURE RATINGS FOR MONEL 400


Nominal Designation

Forgings

Castings

Plates

67Ni 30Cu


B564Gr. N04400(1)

...


B127Gr. N04400(1)

Working Pressures by Classes psig

Temp F

150

300

400

600

900

1500

2500

20 to 100

230

600

800

1200

1800

3000

5000

200

200

525

700

1050

1575

2630

4380

300

190

490

655

980

1470

2450

4080

400

180

475

530

945

1420

2365

3340

500

170

475

630

945

1420

2365

3940

600

140

475

630

945

1420

2365

3340

650

125

475

630

945

1420

2365

3940

700

110

470

525

940

1410

2350

3920

750

95

465

620

930

1395

2330

3880

800

80

460

610

915

1375

2290

3820

850

65

375

505

755

1130

1885

3145

900

50

275

365

550

825

1370

2285

   






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