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Cupro Nickel 90/10 Studs Manufacturer & Exporter in India

Explore Cupro Nickel 90/10 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-200

Min Temp

1000

Max Temp

🌡

1000

Suitable for continuous service up to approximately 1000°C under typical operating conditions.

⚡

700

Typical tensile strength around 700 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.9

Typical density is approximately 8.9 g/cm³.

Product Overview

What are Cupro Nickel 90/10 Studs?

Cupro Nickel 90/10 studs are threaded fasteners manufactured from a copper-nickel alloy containing 90% copper and 10% nickel, designated as UNS C70600. These studs are produced from ASTM B151 or B466 bar and rod, offering excellent resistance to seawater corrosion, biofouling, and stress corrosion cracking. The alloy’s inherent toughness and ductility make Cupro Nickel 90/10 studs ideal for marine and offshore bolted connections, especially where long-term exposure to brine, saline, or brackish water is expected.

With a minimum tensile strength of 245 MPa and outstanding resistance to dezincification and hydrogen embrittlement, Cupro Nickel 90/10 studs are widely specified for heat exchanger tube sheets, condenser assemblies, and piping flange connections in shipbuilding, desalination, and coastal power plants.

Quick Specifications

MaterialCupro Nickel 90/10
UNS NumberC70600
DIN Number2.0872
Material StandardASTM B151 / B466
Stud Standard (Metric)DIN 938 / DIN 976 / ISO 898-1
Stud Standard (Inch)ASME B16.5 / B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength245 MPa (35.5 ksi) min
Yield Strength105 MPa (15 ksi) min
HardnessMax 80 HRB / 150 HB
? All material certified by NABL-accredited laboratory. Positive Material Identification (PMI) available on request.

Complete the Fastener Set

Other Cupro Nickel 90/10 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Cupro Nickel 90/10 fastener range from certified copper-nickel alloy bar stock, including Cupro Nickel 90/10 Bolts, Cupro Nickel 90/10 Nuts, Cupro Nickel 90/10 Screws, Cupro Nickel 90/10 Washers, and Cupro Nickel 90/10 Threaded Rods. All Cupro Nickel 90/10 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Cupro Nickel 90/10 Bolts
Cupro Nickel 90/10 Nuts
Cupro Nickel 90/10 Screws
Cupro Nickel 90/10 Washers
Cupro Nickel 90/10 Threaded Rods

Technical Data

Cupro Nickel 90/10 Studs Dimensions, Sizes & Thread Standards

Cupro Nickel 90/10 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 938 (double end), DIN 976 (threaded rod), and ASME B16.5 for flange stud bolts. Custom lengths available in 5mm increments. Inch dimensions per ASME B18.31.2.

Stud Dimensions - Metric (DIN 938 / DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Overall Length (mm)Min L (mm)Max L (mm)
M61.01840-20040200
M81.252250-25050250
M101.52660-30060300
M121.753070-40070400
M162.03880-50080500
M202.544100-600100600
M243.054120-800120800
M303.566150-10001501000
M364.078180-12001801200
M424.590200-15002001500
M485.0102250-20002502000
M565.5114300-25003002500
M646.0126350-30003503000

Dimensional & Material Standards

StandardCoversThread
DIN 938Double end studsMetric
DIN 976Threaded rodsMetric
ISO 898-1Mechanical propertiesMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
Material StandardRequirement
ASTM B151Bar/rod - UNS C70600
ASTM B466Seamless pipe/tube
EN 12163Rod for general purposes
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Cupro Nickel 90/10 Chemical Composition

Cupro Nickel 90/10 Studs are manufactured from a copper-nickel alloy with nickel (9–33%), iron (1–2%), and manganese additions per ASTM and MIL-C-15726. Iron additions are essential — they form a protective surface film that resists seawater impingement and erosion-corrosion at flow velocities up to 3.5 m/s in shipboard piping and offshore cooling systems.

Chemical Composition per ASTM B151

ElementComposition (%)
Copper (Cu)88.6% min
Nickel (Ni) incl. Cobalt9.0-11.0%
Iron (Fe)1.0-1.8%
Manganese (Mn)1.0% max
Zinc (Zn)1.0% max
Lead (Pb)0.05% max
Phosphorus (P)0.04% max
Other elements0.30% max (total)
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Cupro Nickel 90/10 Alloy Composition Matters for Studs

Nickel (9–11%) — Seawater Corrosion Resistance
Nickel content in Cupro Nickel 90/10 provides exceptional resistance to seawater corrosion, making these studs ideal for marine and desalination plant applications where stainless steel may fail due to chloride attack.
Iron & Manganese — Strength & Erosion Resistance
Iron and manganese additions improve the alloy’s mechanical strength and resistance to impingement and erosion by fast-flowing seawater, ensuring long service life for bolted joints in piping and heat exchangers.
Low Impurity Levels
Strict limits on lead, phosphorus, and other impurities ensure Cupro Nickel 90/10 studs are safe for potable water and prevent embrittlement or stress corrosion cracking in critical service.

Fastener Performance

Cupro Nickel 90/10 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Cupro Nickel 90/10 Studs per ASTM. Cupro Nickel 90/10 studs achieve 700 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12322612
M16655220
M2013010432
M2422017646
M3043034474
M36750600107
M421200960150
M4818001440210
?? Anti-galling: Use molybdenum-based or nickel-based anti-seize. Lubricated values assume K=0.16. Avoid copper-based anti-seize in seawater service.

Industry Applications

Cupro Nickel 90/10 Studs Applications — Industries & End Uses

Cupro Nickel 90/10 Studs from RealBolt are specified across marine shipbuilding, offshore seawater systems, and naval defence where excellent corrosion resistance and 700 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Cupro Nickel 90/10 stud bolts are the preferred choice for seawater piping flanges, heat exchanger tube sheets, and valve assemblies on naval and commercial vessels. Their resistance to biofouling and chloride attack ensures long-term reliability in hull penetrations and seawater cooling systems.
Studs for high-pressure flange connections, filter housings, and evaporator assemblies in reverse osmosis and multi-stage flash desalination plants. Cupro Nickel 90/10’s immunity to brine and saline water corrosion makes it ideal for critical bolted joints in these environments.
Used for condenser tube sheet bolting, cooling water intake structures, and heat exchanger channel covers in coastal and nuclear power plants. The alloy’s resistance to impingement and erosion by fast-flowing seawater is unmatched by stainless steel.
Stud bolts for firewater systems, riser clamps, and splash zone structural connections where resistance to seawater, marine growth, and hydrogen embrittlement is essential. Cupro Nickel 90/10 is specified in NORSOK and Shell DEP for offshore piping hardware.

Cupro Nickel 90/10 Studs Standards & International Certifications

Cupro Nickel 90/10 Studs from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, Lloyds Register or DNV certification, NACE MR0175, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 938 DIN 939 DIN 976-1 ASME B18.31.2 BS 1768 IS 1364 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Cupro Nickel 90/10 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Cupro Nickel 90/10 Studs — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
022-6743-7972
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Answers for Buyers

Cupro Nickel 90/10 Studs — Frequently Asked Questions

Browse expert answers to common questions about Cupro Nickel 90/10 Studs from RealBolt — covering 70/30 vs 90/10 selection, ASTM B151, seawater immunity, MIL-C-15726 approval, sizes, and Lloyds/DNV certification. Contact our technical team directly for project-specific guidance on Cupro Nickel 90/10 studs selection and pricing.
Cupro Nickel 90/10 stud bolts are available to DIN 938 (double end), DIN 976 (threaded rod), ISO 898-1 (mechanical properties), and ASME B16.5 (flange stud bolts). Inch thread forms per ASME B18.31.2 (UNC/UNF) are also supplied. Custom thread forms and lengths can be manufactured to order.
Use a molybdenum-based or nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Marine Grade) for Cupro Nickel 90/10 studs, especially in marine environments. Avoid copper-based anti-seize in seawater service to prevent galvanic corrosion. Apply to threads and nut bearing surfaces for optimal performance.
Yes – Cupro Nickel 90/10 studs are specifically designed for continuous immersion in seawater and brine. They resist pitting, crevice corrosion, and biofouling, making them ideal for shipbuilding, desalination, and offshore applications. No special coatings or cathodic protection are required for most marine uses.
No formal MOQ for standard sizes (M8-M36) held in stock – we supply from single pieces for urgent repairs. Custom sizes or non-standard threads may require a 10 kg minimum. Quantity discounts are available at 50 pcs, 200 pcs, and 500 pcs.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil