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Cupro Nickel 90/10 Bolts

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Manufacturer, Exporter & Supplier of Cupro Nickel 90/10 Bolts

Cupro Nickel 90/10 Bolts for Marine & Offshore Corrosion-Resistant Applications

Cupro Nickel 90/10 Bolts are engineered fasteners manufactured from a copper-nickel alloy containing approximately 90% copper and 10% nickel, widely recognized for exceptional resistance to seawater corrosion, biofouling, and chloride-rich environments. These bolts are critical in marine engineering, offshore oil & gas structures, desalination plants, and shipbuilding assemblies where conventional stainless steels may suffer from localized pitting or crevice corrosion over time.

Cupro Nickel 90/10 Bolts Manufacturer

Manufactured to meet internationally recognized specifications such as ASTM B151 / UNS C70600 equivalency standards, these fasteners maintain mechanical stability under fluctuating thermal and saline conditions. Their balanced combination of strength, ductility, and anti-corrosive performance makes them a preferred choice for long-life critical infrastructure.

KK Fasteners supplies Cupro Nickel 90/10 Bolts to global engineering contractors and OEM industries with full material traceability, ensuring every batch meets strict dimensional and metallurgical compliance requirements.

Technical Specification List Of Cupro Nickel 90/10 Bolts

Parameter Specification
Material Copper Nickel Alloy 90/10 (Cu 90%, Ni 10%)
UNS Grade C70600
Standards ASTM B151, DIN, ISO, BS, JIS (Equivalent fastener standards)
Size Range M6 to M64 / 1/4" to 2-1/2"
Thread Types Metric (ISO), UNC, UNF, BSW
Tensile Strength 275 – 345 MPa
Yield Strength ≥ 105 MPa
Hardness 70 – 90 HRB
Density Approx. 8.94 g/cm³
Temperature Resistance Up to ~300°C (depending on application environment)
Surface Finish Plain, Polished, Anti-galling coating (optional)
Head Types Hex Bolt, Heavy Hex Bolt, Stud Bolt, U Bolt, Anchor Bolt
Manufacturing Process Hot forging, CNC machining, thread rolling
Inspection Dimensional inspection, hardness testing, chemical composition analysis

Chemical Composition Of Cupro Nickel 90/10 Bolts

Cu-Ni 90/10 Cu Pb Mn Fe Zn Ni
88.6 min 0.05 max 1.0 max 1.8 max 1 max 9-11 max

Mechanical Properties Of Cupro Nickel 90/10 Bolts

Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
8.1 g/cm3 1443 °C (2430 °F) Psi – 35,000, MPa – 241 Psi -80,000, MPa -551 30 %

Equivalent Grades of Cupro Nickel 90/10 Bolts

STANDARD UNS WERKSTOFF NR.
Cupro Nickel 90/10 C70600 2.0872

Cupro Nickel 90/10 Hex Bolts Dimensions

Hex Bolt Dimension

All measurements in millimeters

NOMINAL SIZE (D)
BODY DIAMETER
BOLT HEAD THICKNESS
ACROSS THE FLATS
ACROSS CORNERS
D (MAX)
D (MIN)
H (MAX)
H (MIN)
F (MAX)
F (MIN)
C (MAX)
C (MIN)
m10
10.00
9.78
6.63
6.17
17.00
15.73
18.48
17.77
m12
12.00
11.73
7.76
4.24
19.00
17.73
20.78
20.03
m14
14.00
13.73
9.09
8.51
22.00
20.67
24.25
23.35
m16
16.00
15.73
10.32
9.68
24.00
23.67
27.71
26.75
m20
20.00
19.67
12.88
12.12
30.00
29.16
34.64
32.95
m24
24.00
23.67
15.44
14.56
36.00
35.00
41.57
39.55
m30
30.00
29.67
19.48
17.92
46.00
45.00
53.12
50.85
m36
36.00
35.61
23.38
21.63
55.00
53.80
63.51
60.79
m42
42.00
41.38
26.97
25.03
65.00
62.90
75.06
71.71
m48
48.00
47.38
31.07
28.93
75.00
72.60
86.60
82.76
m56
56.00
55.26
36.2
33.80
85.00
82.20
98.15
93.71
m64
64.00
63.26
41.32
38.68
95.00
91.80
109.70
104.65
m72
72.00
71.26
46.45
43.55
105.00
101.40
121.24
115.60
m80
80.00
79.26
51.58
48.42
115.00
111.00
132.72
126.54
m90
90.00
89.13
57.74
54.26
130.00
125.50
150.11
143.07
m100
90.00
99.13
63.9
60.10
145.00
140.00
167.43
159.60

Cupro Nickel 90/10 Bolts Weight Chart

MM THREADS AS PER IS 1363/67
APPROXIMATE WEIGHT IN KGS FOR 100 NOS
LENGTH DIAMETER
M 5 M 6 M 8 M 10 M 12 M 14 M 16 M 18 M 20 M 22
16 mm 0.448 0.743 1.590 3.211
20 mm 0.598 0.812 1.711 3.411 4.892
25 mm 0.660 0.897 1.871 3.660 5.252 8.170
30 mm 0.737 1.010 2.070 3.912 5.574 9.690 10.707 18.657
35 mm 0.804 1.120 2.271 4.223 5.974 10.000 11.416 16.026 19.608
40 mm 0.881 1.230 2.470 4.533 6.410 10.288 12.107 16.667 20.747
45 mm 0.958 1.340 2.671 4.840 6.859 10.504 12.821 17.241 21.739
50 mm 1.030 1.450 2.870 5.155 7.299 11.261 13.624 17.857 22.727 28.409
55 mm 1.560 3.071 5.464 7.740 11.628 14.409 18.868 23.810 30.120
60 mm 1.670 3.270 5.774 8.183 12.255 15.244 20.000 25.126 32.051
65 mm 1.781 3.472 6.083 8.621 12.626 16.026 21.008 26.455 34.014
70 mm 1.890 3.671 6.394 9.058 12.987 16.835 22.124 27.778 35.461
75 mm 2.000 3.873 6.702 9.506 13.228 17.606 23.256 29.070 39.063
80 mm 2.111 4.072 7.013 10.000 13.889 18.248 24.510 30.303 40.000
90 mm 4.472 7.634 10.917 14.925 19.841 26.042 33.113 41.667
100 mm 4.873 8.251 11.820 16.340 21.459 27.778 35.714 46.296
110 mm 8.881 12.723 17.730 23.041 31.250 38.168 47.170
120 mm 9.506 13.624 18.797 24.631 32.895 40.984 50.000
130 mm 10.101 14.535 20.000 26.316 34.722 43.478 52.632
140 mm 10.707 15.432 20.833 27.933 35.461 46.296 55.556
150 mm 11.312 16.340 22.222 29.412 37.594 48.544 58.824
160 mm 11.905 17.241 24.272 31.056 40.984 50.505 61.728
170 mm 12.500 18.116 32.680 53.191 64.935
180 mm 13.123 19.011 26.882 34.247 55.556 67.568
190 mm 13.736 19.920 35.971 58.140 70.423
200 mm 14.327 20.833 29.586 37.594 49.020 60.976 73.529
220 mm 15.528 22.624 40.650 65.789 79.365
240 mm 16.722 24.510 43.860 71.429 84.746
250 mm 17.301 25.381 45.455 74.627 87.719
260 mm 17.921 26.316 47.170 76.923 90.909
280 mm 19.157 28.090 50.505 81.967 98.039
300 mm 20.325 29.940 53.763 87.719 104.167
320 mm 31.646 56.818 92.593
340 mm 33.557 60.241 98.039
360 mm 35.211 63.291 104.167
380 mm 37.037 66.667 108.696
400 mm 39.063 69.444 113.636

Different Types of Cupro Nickel 90/10 Bolts

  • Cupro Nickel 90/10 Flanged Bolts
  • Cupro Nickel 90/10 Hex Bolts
  • Cupro Nickel 90/10 U Bolts
  • Cupro Nickel 90/10 Shoulder Bolts
  • Cupro Nickel 90/10 Eye Bolts
  • Cupro Nickel 90/10 Heavy Hex Bolts
  • Cupro Nickel 90/10 Hollow Hex Bolts
  • Cupro Nickel 90/10 Hollow Allen Bolts
  • Cupro Nickel 90/10 Machine Bolts
  • Cupro Nickel 90/10 Socket Head Bolts
  • Cupro Nickel 90/10 Hex Flange Bolts
  • Cupro Nickel 90/10 Lag Bolts
  • Cupro Nickel 90/10 J Bolts
  • Cupro Nickel 90/10 Elevator Bolts
  • Cupro Nickel 90/10 Hanger Bolts
  • Cupro Nickel 90/10 Carriage Bolts
  • Cupro Nickel 90/10 Allen Bolts
  • Cupro Nickel 90/10 Anchor Bolts
  • Cupro Nickel 90/10 Countersunk Bolts
  • Cupro Nickel 90/10 Stud Bolts
  • Cupro Nickel 90/10 Square Head Bolts
  • Cupro Nickel 90/10 Stud Bolts
  • Cupro Nickel 90/10 Full Threaded Stud Bolts
  • Cupro Nickel 90/10 Tap End Stud Bolts
  • Cupro Nickel 90/10 Double End Stud Bolts
  • Cupro Nickel 90/10 Reduced Shank Stud Bolts
  • Cupro Nickel 90/10 Flange Bolting Stud Bolts
  • Cupro Nickel 90/10 Weld Studs
  • Cupro Nickel 90/10 Threaded Rods
  • Cupro Nickel 90/10 Hex Head Bolts
  • Cupro Nickel 90/10 Jack Bolts
  • Cupro Nickel 90/10 Structural Bolts
  • Cupro Nickel 90/10 Step Bolts
  • Cupro Nickel 90/10 Square Head Machine Bolts
  • Cupro Nickel 90/10 Plow Bolts
  • Cupro Nickel 90/10 Metric Bolts
  • Cupro Nickel 90/10 Hex Tap Bolts
  • Cupro Nickel 90/10 Hex Machine Bolts
  • Cupro Nickel 90/10 Shoulder Eye Bolts
  • Cupro Nickel 90/10 Serrated Flange Bolts
  • Cupro Nickel 90/10 Turned Eye Bolts
  • Cupro Nickel 90/10 Long Bolts
  • Cupro Nickel 90/10 Bent Bolts
  • Cupro Nickel 90/10 Square U Bolts
  • Cupro Nickel 90/10 Timber Bolts
  • Cupro Nickel 90/10 15 Point Flange Bolts
  • Cupro Nickel 90/10 Button Head Bolts
  • Cupro Nickel 90/10 Hexagon Flange Bolts
  • Cupro Nickel 90/10 Stud Bolts
  • Cupro Nickel 90/10 Hexagon Head Bolts
  • Cupro Nickel 90/10 Lifting Eye Bolts
  • Cupro Nickel 90/10 T Bolts
  • Cupro Nickel 90/10 Threaded Bolts

Key Technical Features

  • Seawater corrosion resistance: Designed to resist chloride-induced pitting and crevice corrosion, making them ideal for continuous immersion and splash-zone marine environments.
  • Biofouling resistance: Copper-rich surface chemistry reduces marine organism adhesion, improving long-term structural efficiency in offshore applications.
  • Stable mechanical performance: Maintains tensile integrity under cyclic loading conditions typical in shipbuilding and offshore platforms.
  • Precision dimensional control: Manufactured with tight tolerance limits to ensure consistent fitment in flanged and structural assemblies.
  • Excellent thermal stability: Performs reliably across a wide temperature range, suitable for both cryogenic marine systems and warm seawater processing plants.
  • Anti-galling behavior: Reduced friction between mating threads improves assembly reliability in maintenance-heavy environments.
  • Non-magnetic properties: Suitable for specialized marine instrumentation and naval engineering systems requiring magnetic neutrality.
  • Long service life: Engineered for extended operational durability, reducing lifecycle maintenance costs in submerged installations.

Industry Applications

Cupro Nickel 90/10 Bolts are primarily used in environments where seawater exposure and corrosion resistance are critical for structural safety and operational continuity.

  • Shipbuilding & Marine Engineering — Used in hull assemblies, deck fittings, and seawater piping systems to prevent long-term corrosion damage.
  • Offshore Oil & Gas Platforms — Securing structural modules, risers, and subsea equipment exposed to harsh saline conditions.
  • Desalination Plants — Applied in high-pressure filtration and seawater intake systems requiring corrosion-resistant fastening solutions.
  • Power Generation Plants — Used in cooling water systems and heat exchangers operating with seawater circulation.
  • Chemical Processing Units — Suitable for chloride-rich chemical environments where conventional steels degrade rapidly.
  • Naval Defense Systems — Used in submarine and naval vessel assemblies requiring non-magnetic, corrosion-resistant fasteners.
  • Coastal Infrastructure Projects — Bridges, piers, and seawater treatment facilities exposed to continuous marine atmosphere.

Manufacturing & Quality Assurance

Cupro Nickel 90/10 Bolts are produced using precision hot forging followed by CNC machining to achieve dimensional accuracy and consistent mechanical properties. Thread rolling processes are applied to enhance fatigue strength and ensure smooth load distribution under stress conditions.

Each batch undergoes strict quality inspections including dimensional verification, hardness testing, and surface integrity checks. Chemical composition analysis ensures correct Cu-Ni ratio alignment with UNS C70600 standards. KK Fasteners implements traceable batch coding systems and adheres to ISO 9001 quality management protocols to maintain global compliance standards across export shipments.

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We can assure you one of best prices in the Industry. We respond to all enquiries with in 4-8 hours on all business days. Send us your requirement on inquiry@kkfasteners.com
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Cupro Nickel 90/10 Bolts - FAQs

Cupro Nickel 90/10 Bolts are corrosion-resistant fasteners made from an alloy containing 90% copper and 10% nickel. They are designed for marine and offshore environments where resistance to seawater, biofouling, and chloride-induced corrosion is critical for long-term structural reliability.

These bolts are manufactured from UNS C70600 copper nickel alloy. This grade is widely used in marine engineering due to its excellent resistance to seawater corrosion, good mechanical strength, and stable performance in submerged and splash-zone conditions.

Cupro Nickel 90/10 bolts are generally produced in accordance with ASTM B151 standards, with equivalent compliance to DIN, ISO, BS, and JIS specifications depending on project and customer requirements.

They are used in shipbuilding, offshore oil platforms, desalination plants, marine cooling systems, chemical processing units, and coastal infrastructure where continuous exposure to seawater or humid saline environments occurs.

A reliable manufacturer should offer certified raw materials, ISO 9001 quality systems, full traceability, and adherence to international standards. Suppliers like KK Fasteners also provide inspection reports, testing certificates, and export documentation for global procurement needs.

Cupro Nickel 90/10 Bolts - Export Destination

Cupro Nickel 90/10 Bolts Supplier in North America
Antigua and Barbuda, Bahamas, Barbados, Belize, Canada, Costa Rica, Cuba, Dominica, Dominican Republic, El Salvador, Grenada, Guatemala, Haiti, Honduras, Jamaica, Mexico, Nicaragua, Panama, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Trinidad and Tobago, United States.
Cupro Nickel 90/10 Bolts Supplier in South America
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, Suriname, Uruguay, Venezuela.
Cupro Nickel 90/10 Bolts Supplier in Europe
Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic (Czechia), Denmark, Estonia, Finland, France, Germany, Greece, Holy See, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, Russia, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom.
Cupro Nickel 90/10 Bolts Supplier in Asia
Afghanistan, Armenia, Azerbaijan, Bahrain, Bangladesh, Bhutan, Brunei, Cambodia, Cyprus, Georgia, India, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Laos, Lebanon, Malaysia, Maldives, Mongolia, Myanmar, Nepal, Oman, Pakistan, Palestine, Philippines, Qatar, Saudi Arabia, Singapore, South Korea, Sri Lanka, State of Palestine, Syria, Taiwan, Tajikistan, Thailand, Timor-Leste, Turkey, Turkmenistan, United Arab Emirates, Uzbekistan, Vietnam, Yemen.
Cupro Nickel 90/10 Bolts Supplier in Australia
Australia, Fiji, Kiribati, Marshall Islands, Micronesia, Nauru, New Zealand, Palau, Papua New Guinea, Samoa, Solomon Islands, Tonga, Tuvalu, Vanuatu.

Cupro Nickel 90/10 Bolts remain a preferred fastening solution for long-term marine reliability where corrosion resistance directly impacts structural safety. With controlled manufacturing processes and certified material sourcing, KK Fasteners supports engineering-driven procurement across global offshore and industrial projects.

For technical specifications, project quotations, or custom manufacturing requirements, connect with the engineering team at KK Fasteners to receive application-specific support and documentation.

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