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Copper Nickel Fasteners

copper nickel fasteners

What are the common applications of Copper Nickel Fasteners?

Perfectly suitable for corrosive environments, including seawater, these fasteners display strength, durability, and resilience in duress. Copper nickel fasteners use an alloy of copper and nickel; combinations of 70-30 and 90-10 are the most popular.

The core applications of copper nickel hex bolts include:

  • Shipbuilding
  • Water desalination
  • Power generation
  • Seawater piping
  • Splash-zone sheathing for offshore roles
  • Chemical processing

Buyers can order copper nickel screws in various sizes per their requirements. We supply fasteners in designs like dowel pins, bolts, washers, etc. Hex bolts have inherent versatility and offer a more secure, sturdier grip than other head types.


Most Trusted Cuni Hex Bolt Manufacturer in India, Check Specification

Specification of Copper Nickel Fasteners


copper nickel fasteners specifications

Cupro Nickel Hex Bolt & Nuts Delivery Time Tables


Country  Name  Delivery Time
Denmark  40-50 days
Mexico  30-40 days
Canada  60-70 days
Panama  40 days
USA  45-60 days
Costa Rica  50 days

Supplier of Cupro Nickel Nut in Variety of Sizes at Competitive Price, Check Size Chart

Size of Cupronickel Fasteners


Copper nickel fastener Size Tensile strength Class Standard
Copper nickel hex bolt, screws, studs, washers, nuts M4 to M80 1040N / mm2 min 10.9 ISO 4017 (fully threaded) / ISO 4014 (half threaded)

Sizes of Cuni Screws


Screws Type
SIZE
GRADE
ASME
ISO
ASTM
Socket Head Cap Screws
M1.6 to M64
12.9
B18.3.1 M
4762
A574M
Socket Head Shoulder Screws
M6 to M24
012.9
B18.3.3M
-
-
Socket Low Head Cap Screws
M4 to M20
10.9
-
-
-
Countersunk Socket Head Screws
M3 to M20
012.9
B18.3.5M
10642
F835M
Button Head Socket Screws
M3 to M12
012.9
B18.3.4M
7380
F835M
Knurled Point Socket Set Screws
M3 to M20
45H
B18.3.6M
4029
F912M
Flange Button Head Socket Screws
M3 to M10
012.9
-
-
F835M
Flat Point Socket Set Screws
M6 to M12
45H
B18.3.6M
4026
F912M
Dog Point Socket Set Screws
M3 to M20
45H
B18.3.6M
4028
F912M
Plain Point Socket Set Screws
M3 to M20
45H
B18.3.6M
4029
F912M
Cone Point Socket Set Screws
M3 to M12
45H
B18.3.6M
4027
F912M
Taper Pressure Plug
M8 to M22
-
-

How do Copper Nickel Fasteners compare to other types of fasteners in terms of corrosion resistance, strength, and use in cryogenic applications?

These products can operate without losing strength and corrosion resistance at cryogenic temperatures. Copper nickel alloy washers have maximum operating temperatures around 600°C or 1,110°F. Their adaptability to such a diverse temperature range makes them beneficial for heat exchangers and condensers.

Compared to other alternatives like stainless steel, a copper nickel threaded rod shows a lower risk of stress corrosion cracking and hydrogen embrittlement. They can endure everything from non-oxidizing acids and alkalis to chlorides, fluorides, and gases.

A Cuni stud bolt also boasts brilliant strength but it is lower than options like Inconel. Occasionally, niobium, silicon, beryllium and other elements may get included in these alloys to fine-tune specific properties.

Types of Copper Nickel Alloys Fasteners


cunifer Bolts

cunifer stud bolts

Cuni Screws

cuni Screws

Copper Nickel Fasteners

Copper Nickel Fasteners

cupro nickel hex bolts

cupro nickel hex bolts

Buy Top-Quality Cunifer Stud Bolt in UNF/ UNC & Extra fine UNEF Threads, Check Torque Chart

Cuni Bolt Torque Chart


Flange Size   20 12 1 1-1/4 2 1-1/2 2-1/2 4 3 3-1/2 6 10 5 24 14 8 12 16 18 03/4
B16.5 Class 150 RF/ Ring Gaskets Torque / Round (ft-lbs) Dwg/No. (Bolts) 20 4 4 4 4 4 4 8 4 8 8 12 8 20 12 8 12 16 16 4
1st 213 10 15 20 40 20 40 40 40 40 60 95 60 300 147 60 95 147 213 13
2nd 426 20 30 40 80 40 80 80 80 80 120 190 120 600 294 120 190 294 426 27
Final 710 30 50 60 120 60 120 120 120 120 200 320 200 1,000 490 200 320 490 710 40
  Stud Bolts Tighten Sequence Bolts Size 1-1/8 01/2 01/2 01/2 05/8 01/2 05/8 05/8 05/8 05/8 03/4 07/8 03/4
1-1/4
1 03/4 07/8 1
1-1/8
01/2
B16.5 Class 150 FF/ Full Face Gaskets Torque / Round (ft-lbs) Dwg*/No. (Bolts) 20 4 4 4 4 4 4 8 4 8 8 12 8 20 12 8 12 16 16 4
1st 213 20 20 20 40 20 40 40 40 40 60 95 60 300 147 60 95 147 213 20
2nd 426 40 40 40 80 40 80 80 80 80 120 190 120 600 294 120 190 294 426 40
Final 710 60 60 60 120 60 120 120 120 120 200 320 200 1,000 490 200 320 490 710 60
  Stud Bolts Tighten Sequence Bolts Size 1-1/8 01/2 01/2 01/2 05/8 01/2 05/8 05/8 05/8 05/8 03/4 07/8 03/4 1-1/4 1 03/4 07/8 1 1-1/8 01/2

What are the advantages of using copper-nickel fasteners in industrial applications?

CU-NI nuts deliver multiple advantages in industrial applications like offshore refineries, hydraulic lines, and marine sectors.

  • Displays good mechanical strength (tensile rating of 551 Mpa)
  • Copper nickel anchor bolts resist microbial growth, including bacteria and fungi
  • Can handle both dry and wet conditions under different temperatures
  • Good electrical and thermal conductivity properties
  • Retains mechanical properties even under extended load and stress

We have a vast collection of cupro nickel studs manufactured from high-quality raw materials designed to deliver long operational life.

Find Cu Ni Alloy Threaded Rod and Screws Sizes and Chemical Composition

Cupro Nickel Hex Bolts Chemical Composition


Grade Mn Cu Pb Fe Ni Zn
90/10 1.0 max 88.6 min 0.5 max 1.8 max 9-11 max 1 max
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max

Copper Nickel Nuts Mechanical Properties


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
90/10 2260°F 8.8g/cm3 50000 PSi 30% 20000PSi
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi

Cuni Alloys Stud Bolt Equivalent Properties


Grade UNS Werkstoff Nr.
90/10 C70600 2.0872
70/30 C71500 2.0882
Check Copper Nickel Alloys Washer and Socket Head Cap Screw Properties and Weight Chart

Cupro Nickel Bolts Weight Chart


Threads as per IS 1363/67
Cupro nickel fasteners weight / kgs for 100 NOS
Length Diameter
M6 M5 M10 M8 M16 M12 M20 M14 M18 M22
20 mm 0.812 0.598 3.411 1.711 4.892
16 mm 0.743 0.448 3.211 1.590
25 mm 0.897 0.660 3.660 1.871 5.252 8.170
35 mm 1.120 0.804 4.223 2.271 11.416 5.974 19.608 10.000 16.026
30 mm 1.010 0.737 3.912 2.070 10.707 5.574 18.657 9.690
40 mm 1.230 0.881 4.533 2.470 12.107 6.410 20.747 10.288 16.667
50 mm 1.450 1.030 5.155 2.870 13.624 7.299 22.727 11.261 17.857 28.409
45 mm 1.340 0.958 4.840 2.671 12.821 6.859 21.739 10.504 17.241
55 mm 1.560 5.464 3.071 14.409 7.740 23.810 11.628 18.868 30.120
65 mm 1.781 6.083 3.472 16.026 8.621 26.455 12.626 21.008 34.014
60 mm 1.670 5.774 3.270 15.244 8.183 25.126 12.255 20.000 32.051
70 mm 1.890 6.394 3.671 16.835 9.058 27.778 12.987 22.124 35.461
80 mm 2.111 7.013 4.072 18.248 10.000 30.303 13.889 24.510 40.000
75 mm 2.000 6.702 3.873 17.606 9.506 29.070 13.228 23.256 39.063
90 mm 7.634 4.472 19.841 10.917 33.113 14.925 26.042 41.667
110 mm 8.881 23.041 12.723 38.168 17.730 31.250 47.170
100 mm 8.251 4.873 21.459 11.820 35.714 16.340 27.778 46.296
120 mm 9.506 24.631 13.624 40.984 18.797 32.895 50.000
140 mm 10.707 27.933 15.432 46.296 20.833 35.461 55.556
130 mm 10.101 26.316 14.535 43.478 20.000 34.722 52.632
150 mm 11.312 29.412 16.340 48.544 22.222 37.594 58.824
170 mm 12.500 32.680 18.116 53.191 64.935
160 mm 11.905 31.056 17.241 50.505 24.272 40.984 61.728
180 mm 13.123 34.247 19.011 55.556 26.882 67.568
200 mm 14.327 37.594 20.833 60.976 29.586 49.020 73.529
190 mm 13.736 35.971 19.920 58.140 70.423

Applications of CUNI Washers


  • Heat exchangers
  • Condensers
  • Seawater desalination plants
  • Systems for compressed air
  • Sanitary systems
  • Fuel oil
  • Hydraulic lines