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Copper Nickel 70/30 Fasteners

Copper nickel 70/30 fasteners specifications

What are Copper Nickel 70/30 Fasteners?

These high-strength fasteners, composed of copper and nickel (70 and 30 per cent) with inclusions of iron and manganese, are worth the investment. Copper nickel 70/30 fasteners work extensively in marine industries, but their applications extend to heat exchangers, distiller tubes, chemical processing, and boiler components.

The true-blue superpowers of UNS C71500 screws are evident in polluted and fast-moving seawater (~4.5m/s) – conditions where lesser components often fail.

We supply varieties of fasteners in this durable material: from a cupro nickel 70/30 stud bolt to threaded rods, screws, and washers. All our deliverables undergo complete testing via positive material identification and other procedures to assess the hardness, pitting resistance, and chemical composition

We are a copper nickel 70/30 hex bolt supplier in India


Specification of copper nickel 70/30 fasteners

Grades American standards of CU-NI 70/30 hex bolt Types
Cupro Nickel 70/30 ASTM, ASME, BS, ISO, ANSI, UNI, DIN, GB, JIS, IS Hex bolt, stud bolt, nuts, screws, washers
Specifications Sizes of copper nickel 70/30 fasteners Threads
ASTM B151 / ASME SB151 M3 - M56 UNF, UNC, BSW, METRIC, BSF, as per customer required
Height Surface treatment of cuni 70/30 bolt Heat treatment of cupro nickel 70/30 washer
3mm-100mm Plain Tempering hardening, stress relieving, spheroidizing

CUNI C71500 stud bolt, made of copper nickel 70/30 ranging in size from M6 to M100

How does the tensile strength of Copper Nickel 70/30 Fasteners compare to other materials commonly used in fasteners?

In corrosion resistance and tensile strength, they are superior to their 90-10 counterparts (372 to 517 MPa). The mechanical robustness of a UNS C71500 threaded rod is also more than some stainless steel grades and materials like titanium.

70-30 cupro nickel washers provide a good balance of longevity and safety in multifaceted roles. However, fasteners built of Inconel and Incoloy are likelier to show even greater tensile strength (over 800 Mpa). Running a Charpy Impact test is recommended for components operating in stressful environments.

Types of cupro nickel 70 30 fastener


cunifer 70/30 Fasteners

cunifer 70/30 Fasteners

UNS C71500 Screws

UNS C71500 Screws

CUNI 70/30 hex bolt

CUNI 70/30 hex bolt

Cu-ni 70/30 Studs

Cu-ni 70/30 Studs

Buy here top-quality of CU-NI 70/30 nut at very reasonable price in India

What makes Copper Nickel 70/30 Fasteners suitable for demanding applications in aerospace, defense, and nuclear industries?

CUNI C71500 nuts are ideal for critical applications like aerospace and nuclear plants. These top-quality fasteners can operate optimally at temperatures as steep as 1038°C or 1900°F.

A DIN 2.0882 anchor bolt frequently works in nuclear power generation, fuel reprocessing, and pickling tanks due to its ability to withstand abrasive agents. In the defense sector, it gets used for sonar equipment, submarine bolts, and propeller shafts.

A CUNI C71500 hex bolt also avoids biofouling, pitting, stress cracking, and impingement. High-velocity waters and turbulence are not a problem for these hardy products. Ease of fabrication and welding is another point in favour of CUNI 70/30 heavy hex bolts.

Chemical composition of cupro nickel 70/30 hex bolts


Grade Mn Cu Pb Fe Ni Zn
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max
UNS C71500 screws creator in all shapes, sizes, and standards, establish stock of cupro nickel 70-30 washers in Mumbai

Mechanical properties of copper nickel 70/30 nuts


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi
To check the availability of DIN 2.0882 bolt, contact us directly and get the latest information on stock

Equivalent grade of cuni 70/30 stud bolt


Grade UNS Werkstoff Nr.
70/30 C71500 2.0882

Sizes of copper nickel 70/30 bolts


Size Types of copper nickel 70/30 bolt Property class Standards Tensile strength
M4 to M80 Copper Nickel 70/30 Hex Head Bolt / Screws 10.9 ISO 4017 (fully threaded) ISO 4014 (half threaded) 1040N / mm2 min

American standards of UNS C71500 screws


Screws Type GRADE SIZE ASTM ISO ASME
Socket low head cap screws 10.9 M4 to M20      
Socket head cap screws 12.9 M1.6 to M64 A574M 4762 B18.3.1 M
Socket head shoulder screws 012.9 M6 to M24     B18.3.3M
Button head socket screws 012.9 M3 to M12 F835M 7380 B18.3.4M
Countersunk socket head screws 012.9 M3 to M20 F835M 10642 B18.3.5M
Flange button head socket screws 012.9 M3 to M10 F835M    
Flat point socket set screws 45H M6 to M12 F912M 4026 B18.3.6M
Knurled point socket set screws 45H M3 to M20 F912M 4029 B18.3.6M
Taper pressure plug M8 to M22    
Cone point socket set screws 45H M3 to M12 F912M 4027 B18.3.6M
plain point socket set screws 45H M3 to M20 F912M 4029 B18.3.6M

Applications of cuni 70/30 threaded rod


  • Sea water equipment
  • Heat exchangers
  • Petrochemicals
  • Gas processing
  • Specialty chemicals
  • Pharmaceutical equipment
  • Chemical equipment
  • Power generation
  • Condensers
  • Off-shore oil drilling industry
  • Pulp and paper industry

Weight chart of copper nickel 70/30 fasteners


Lengths #3 #2 #4 #6 #5 #8 #12 #10 1/4″ 3/8″ 5/16″
1/4 0.80 0.60 1.00 1.7 1.4 2.8 5.6 4.3 8.5
3/16 0.70 0.50 0.90 1.5 1.2 2.5 3.9
5/16 0.90 0.60 1.20 1.9 1.5 3.1 6.1 4.6 9.1 16.7
7/16 1.00 0.80 1.50 2.2 1.9 3.6 6.9 5.4 10.4 30.7 18.8
3/8 0.90 0.70 1.30 2.1 1.7 3.4 6.5 5.0 9.8 29.2 17.7
1/2 1.10 0.80 1.60 2.4 2.0 3.9 7.4 5.8 11.1 32.2 19.8
5/8 1.30 1.00 1.80 2.8 2.3 4.5 8.3 6.6 12.4 35.1 21.9
9/16 1.20 0.90 1.70 2.6 2.2 4.2 7.8 6.2 11.7 33.6 20.9
1/8 0.55 0.40 0.70 1.4 1.1
3/4 1.50 1.10 2.10 3.2 2.6 5.0 9.2 7.3 13.6 38.0 24.0
1″ 1.90 1.40 2.50 3.9 3.4 6.2 11.0 8.9 16.1 44.0 28.8
7/8 1.70 1.30 2.30 3.5 3.0 5.6 10.1 8.1 14.9 41.0 26.1
1-1/8″ 2.00 1.50 2.80 4.3 3.8 6.7 11.9 9.6 17.4 47.0 30.2
1-1/2″ 2.50 1.80 3.50 5.3 4.7 8.3 14.7 11.9 21.2 55.8 36.5
1-1/4″ 2.20 1.60 3.00 4.6 4.1 7.3 12.8 10.4 18.7 49.8 32.3
1-3/4″ 2.90 2.10 4.00 6.1 5.3 9.4 16.5 13.5 23.7 61.7 40.7
2-1/4″ 3.60 2.60 5.00 7.6 6.7 11.8 20.1 16.6 28.8 73.5 19.0
2″ 3.30 2.40 4.50 6.8 6.0 10.6 18.3 15.0 26.2 67.6 44.8
2-1/2″ 3.90 2.80 5.50 8.3 7.3 12.9 22.0 18.1 31.3 79.5 53.2
3″ 4.70 3.40 6.50 9.8 8.6 15.0 25.6 21.2 36.4 91.3 61.5
2-3/4″ 4.30 3.10 6.00 9.1 7.9 13.9 23.8 19.7 33.9 85.3 57.3