A Ni-Cu alloy with high strength and good corrosion 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
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.
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 |
