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Cupro Nickel 70/30 Threaded Rods Manufacturer & Exporter in India

Explore Cupro Nickel 70/30 Threaded Rods 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 70/30 Threaded Rods?

Cupro Nickel 70/30 threaded rods are high-performance fasteners manufactured from a copper-nickel alloy containing 70% copper and 30% nickel, designated as UNS C71500. These rods are produced in accordance with ASTM B151 and B467 standards, offering exceptional resistance to seawater corrosion, biofouling, and stress corrosion cracking. The alloy’s inherent strength and ductility make it ideal for threaded rod applications in marine, desalination, and chemical processing environments.

With excellent resistance to erosion and impingement attack, Cupro Nickel 70/30 threaded rods are widely specified for use in offshore platforms, shipbuilding, and heat exchanger assemblies where reliability and longevity are critical.

Quick Specifications

MaterialCupro Nickel 70/30
UNS NumberC71500
DIN Number2.0882
Material StandardASTM B151 / B467
Rod Standard (Metric)DIN 975 / DIN 976
Rod Standard (Inch)ASME B18.31.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength245 MPa (35.5 ksi) min
Yield Strength105 MPa (15.2 ksi) min
HardnessMax 80 HRB / 150 HB
? All material certified by NABL-accredited laboratory. PMI and corrosion testing available on request.

Complete the Fastener Set

Other Cupro Nickel 70/30 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Cupro Nickel 70/30 fastener range from certified copper-nickel alloy bar stock, including Cupro Nickel 70/30 Bolts, Cupro Nickel 70/30 Nuts, Cupro Nickel 70/30 Screws, Cupro Nickel 70/30 Washers, and Cupro Nickel 70/30 Studs. All Cupro Nickel 70/30 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Cupro Nickel 70/30 Bolts
Cupro Nickel 70/30 Nuts
Cupro Nickel 70/30 Screws
Cupro Nickel 70/30 Washers
Cupro Nickel 70/30 Studs

Technical Data

Cupro Nickel 70/30 Threaded Rods Dimensions, Sizes & Thread Standards

Cupro Nickel 70/30 Threaded Rods are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 975 (full thread) / DIN 976 (studs) / ASME B18.31.3. Custom lengths up to 3 meters. Inch and metric threads available. All Cupro Nickel 70/30 threaded rods dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Threaded Rod Dimensions - Metric (DIN 975)

Size (M)Pitch (mm)Rod Length (mm)Thread Type
M61.01000 / 2000 / 3000Full
M81.251000 / 2000 / 3000Full
M101.51000 / 2000 / 3000Full
M121.751000 / 2000 / 3000Full
M162.01000 / 2000 / 3000Full
M202.51000 / 2000 / 3000Full
M243.01000 / 2000 / 3000Full
M303.51000 / 2000 / 3000Full
M364.01000 / 2000 / 3000Full
M424.51000 / 2000 / 3000Full
M485.01000 / 2000 / 3000Full
M565.51000 / 2000 / 3000Full
M646.01000 / 2000 / 3000Full

Dimensional & Material Standards

StandardCoversThread
DIN 975Threaded rods, full threadMetric
DIN 976Studs, double endMetric
ASME B18.31.3Threaded rodsUNC/UNF
ISO 898-1Mechanical propertiesMetric
Material StandardRequirement
ASTM B151Rod/bar - UNS C71500
ASTM B467Seamless pipe/tube
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Cupro Nickel 70/30 Chemical Composition

Cupro Nickel 70/30 Threaded Rods 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)65.0-70.0%
Nickel (Ni) incl. Cobalt29.0-33.0%
Iron (Fe)0.4-1.0%
Manganese (Mn)1.0% max
Zinc (Zn)1.0% max
Lead (Pb)0.05% max
Others (total)0.30% max
? All heats verified by NABL-accredited spectrometry. PMI and ferrite testing available on request.

Why Cupro Nickel 70/30 Alloy Composition Matters for Threaded Rods

Nickel (29–33%) — Seawater Corrosion Resistance
The high nickel content in Cupro Nickel 70/30 provides outstanding resistance to seawater corrosion, making these threaded rods ideal for marine and desalination plant applications.
Iron & Manganese — Erosion & Strength
Iron and manganese additions improve resistance to impingement attack and increase mechanical strength, ensuring long service life in high-velocity water environments.
Low Impurity Levels
Strict control of lead, zinc, and other impurities ensures excellent ductility and weldability, critical for threaded rods used in pressure-retaining and structural assemblies.

Fastener Performance

Cupro Nickel 70/30 Threaded Rods Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Cupro Nickel 70/30 Threaded Rods per ASTM. Cupro Nickel 70/30 threaded rods achieve 700 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Rod SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M1232258.5
M16655215.5
M2013010424.5
M2422017635.5
M3042033656.5
M3672057681.5
M421100880110.5
M4816001280145.5
?? Anti-galling: Use marine-grade anti-seize (nickel or molybdenum-based). Lubricated values assume K=0.16. Avoid copper-based anti-seize in seawater applications.

Industry Applications

Cupro Nickel 70/30 Threaded Rods Applications — Industries & End Uses

Cupro Nickel 70/30 Threaded Rods 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 70/30 threaded rods are widely used for hull penetrations, seawater piping supports, and deck equipment mounting in naval and commercial vessels. Their resistance to biofouling and seawater corrosion ensures long-term reliability in harsh marine environments.
Threaded rods for high-pressure piping, brine discharge flanges, and structural supports in reverse osmosis and multi-stage flash desalination plants. The alloy’s immunity to chloride-induced corrosion makes it the preferred choice for critical fastener applications.
Used for assembling riser clamps, cable tray supports, and splash zone structures where resistance to seawater, brine, and marine growth is essential. Cupro Nickel 70/30 threaded rods meet NORSOK and major oil company specifications for offshore hardware.
Threaded rods for tube sheet assemblies, channel covers, and support structures in power plant condensers and chemical process heat exchangers. The alloy’s resistance to ammonia and sulphide stress cracking is critical in these environments.

Cupro Nickel 70/30 Threaded Rods Standards & International Certifications

Cupro Nickel 70/30 Threaded Rods 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 975 DIN 976-1 ASME B18.31.2 IS 1367 IS 1364
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Cupro Nickel 70/30 Threaded Rods from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Cupro Nickel 70/30 Threaded Rods — 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
+91 90226 36025
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Answers for Buyers

Cupro Nickel 70/30 Threaded Rods — Frequently Asked Questions

Browse expert answers to common questions about Cupro Nickel 70/30 Threaded Rods 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 70/30 threaded rods selection and pricing.
Cupro Nickel 70/30 threaded rods are supplied to DIN 975 (full thread), DIN 976 (studs), and ASME B18.31.3 (inch series). Metric and UNC/UNF threads are available. Custom thread forms such as BSW, BSF, and Whitworth can be produced on request with a typical lead time of 2-3 weeks.
Use a marine-grade nickel or molybdenum-based anti-seize compound (such as Molykote P-37 or Jet-Lube Marine Grade) for Cupro Nickel 70/30 threaded rods. This prevents galling and corrosion in seawater. Avoid copper-based anti-seize in marine environments to prevent galvanic corrosion.
Yes – Cupro Nickel 70/30 threaded rods are specifically designed for continuous immersion in seawater and brine. They are immune to chloride pitting, biofouling, and stress corrosion cracking, making them ideal for shipbuilding, desalination, and offshore structures.
No MOQ for standard sizes (M8-M36) held in stock – single rods can be supplied for urgent repairs. Custom diameters or cut lengths typically require a 10 kg minimum. Bulk discounts are available at 25, 100, and 500 rod quantities.

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