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Copper Nickel 90/10 Fasteners

Copper nickel 90/10 fasteners specifications

What are the quality control processes in place for Copper Nickel 90/10 Fasteners?

These products, composed of 90% copper and 10% nickel, occupy a premium space in the industrial fasteners category. Copper nickel 90/10 fasteners also contain iron and manganese – vital additions for improving the strength and other metallurgical properties.

Copper nickel 90/10 bolts are well-known for their corrosion resistance and hardiness in demanding conditions. Manufacturers follow strict quality control to adhere to internationally accepted specifications, for example, DIN 2.0872 nuts.

The quality checks, like spectrometry, must ensure the absence of impurities such as lead, sulphur, or carbon that can lower ductility and ease of weldability. Other procedures to test a CUNI C70600 stud bolt include lab analysis for hardness, strength, and IGC (intergranular corrosion) and a third-party inspection.

CUNI 90/10 hex bolt supplier in India


Specification of copper nickel 90/10 fasteners

Specifications Size Threads
ASTM B 151 / ASME SB 151 3mm - 200mm / M3 – M56 BSF, METRIC, UNF, UNC, BSW, as per client need
Standard Length Types
DIN, BS, ASTM, all International Standards M02 - M33 Hex bolt, nut, screws, stud bolt, washers
Height Surface treatment Tolerance
3mm-100mm Plain 0.05mm

Searching for cuni 90/10 stud bolts? check our wide inventory of UNS C70600 fasteners in ISO metric, UNC, and UNF

What makes Copper Nickel 90/10 Fasteners highly corrosion-resistant to seawater?

Cupro nickel 90/ 10 screws are ideal for marine applications like hulls, propellers, and fishing boats. Their chemical composition lends them this characteristic, promoting the quick formation of a protective oxide layer. Generally, it pertains to cuprous oxide, but cuprous hydroxy-chloride and cupric oxide may also exist.

A copper nickel alloy 90/10 hex nut also shows resistance to biofouling, i.e., the growth of microbes, algae, etc., that can be detrimental to the performance of many other fasteners. The uses of this material cover cargo tank heating coils, seawater cooling, and feeder lines for desalination, among others.

Although a 70-30 alloy can withstand greater seawater velocities, a cupro nickel 90 10 hex bolt is more cost-effective and hence, preferred.

Types of cupro nickel 90 10 fastener


cunifer 90/10 Fasteners

cunifer 90/10 Fasteners

Cuni C70600 Hex Bolt

CUNI 9010 hex bolt

Din 2.0872 Nuts

Din 2.0872 Nuts

Cupro Nickel 90/10 Screws

Cupro Nickel 90/10 Screws

DIN 2.0872 90/10 nuts manufacturer in Mumbai offer custom sizes

What is the thermal conductivity of Copper Nickel 90/10 Fasteners?

These components show good thermal properties, making them fit for brine heaters and heat exchangers. The thermal conductivity of a CU-NI 90-10 threaded rod is 40 W/m-K, i.e., 40 watts per meter-kelvin, at 20°C. It denotes the capability to conduct heat.

In a UNS C70600 washer, the thermal conductivity increases with temperature since the free electrons and lattice vibrations increase. It can go up to approx. 86.6 at 500°C. These fasteners also work in cooling plants and evaporator tubes.

Chemical composition of cupro nickel 90-10 hex bolts


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
Shop from our large selection of cupro nickel 90/10 screws at very low cost

Mechanical properties of copper nickel 90/10 nuts


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
90/10 2260°F 8.8g/cm3 50000 PSi 30% 20000PSi
Check UNS C70600 washer chemical composition and mechanical properties here

Equivalent grade of cuni 90/10 stud bolt


Grade UNS Werkstoff Nr.
90/10 C70600 2.0872

Size chart of cupro nickel 90/10 nuts


Diameter
(Mili meter)
Sizes
(Mili meter)
Height
(mm)
Copper nickel 90/10 hex nut Cuni 90/10 nylock nut Cupro nickel 90-10 jam nut
5 2.5 2 - 1.6
4 2 1.6 - 1.2
5.5 3 2.4 4 1.8
8 5 4 5 2.7
7 4 3.2 5 2.2
10 6 5 6 3.2
13 8 6.5 8 4
11 7 5.5 - 3.5
17 10 8 10 5
22 14 11 14 7
19 12 10 12 6
24 16 13 16 8
30 20 16 20 10
27 18 15 18.5 9

Applications of DIN 2.0872 stud


  • Petrochemical industry
  • Chemical industry
  • Oil and gas industry
  • Pharmaceuticals industry
  • Power plant industry
  • Pulp & paper indusry
  • Energy industry
  • Refining industry
  • Aerospace industry
  • Food processing industry

MAterial testing of UNS C70600 screws


  • Mechanical testing (tensile of area)
  • Chemical analysis (spectro analysis)
  • Micro and macrotest
  • Flaring test
  • Intergranular corrosion test (IGC)
  • Flattening test
  • Positive material identification (PMI)
  • Hardness test
  • Pitting resistance test

Torque chart of copper nickel 90/10 fasteners


Nominal diameter (inch) Threads (in) Torque ft-lb (lubricated) Torque ft-lb (dry)
3/8″ 16 17.7 23.5
24 19.9 26.6
5/16″ 18 10.0 13.2
24 11.0 14.7
1/4″ 20 4.8 6.5
28 5.5 7.4
7/16″ 16 28.2 37.6
24 31.5 42.0
9/16″ 12 62.1 82.7
18 69.2 92.3
1/2″ 13 43.0 57.4
20 48.5 64.7
5/8″ 11 85.7 114.2
18 97.0 129.3
7/8″ 9 245 326
14 270 361
3/4″ 10 152 203
16 170 226
1″ 8 368 490
14 412 549
1-1/2″ 6 639 1484
12 1252 1669
1-1/4″ 7 639 853
12 708 944