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Copper Nickel Circles

copper nickel circle specifications

What are copper nickel circles?

These premium structural components get valued for flexibility, strength, and corrosion resistance. Copper nickel circles can be pricey due to their expensive raw materials and market fluctuations. But their excellent metallurgical profile justifies the cost.

The marine applications of these circles are undoubtedly valuable: submarine components, offshore firewater systems, boat hulls, etc. Copper nickel 70/30 rings also operate in heat exchangers, condensers, and offshore platforms. They contain 70% copper and 30% nickel, with vital inclusions of iron and manganese.

It contrasts with the composition of copper nickel 90/10 forgings, which contain more copper and display lower strength.

Copper Nickel forgings supplier in India


Specification of copper nickel circle


Specifications Size Standard
ASTM B151, B122 6 mm to 120 mm EN, DIN, JIS, ASTM, BS, ASME, AISI
Tolerance Temper Form
K11, H11, H8, H13K9, H10, H9, H12, K12, AT110 (Hard) Forging, plate cut

We are copper nickel 70/30 circle manufacturer in India, check sizes and wall thickness of cupronickel forgings

What are the advantages of using high-quality 90/10 copper nickel ring products?

Exceptional corrosion resistance is one of the finest traits of a copper nickel 90/10 circle. It can resist high-velocity waters, polluted seawater, and chloride-rich conditions without undergoing stress-corrosion cracking.

Procuring high-quality circles manufactured from premium materials improves longevity and efficiency. It also boosts the sustainability of hydraulic lines and distillation units when faced with harsh environmental conditions.

  • Antimicrobial properties help these circles avoid bacterial and mould growth.
  • A UNS C70600 circle can tolerate temperatures between 843 to 954°C.
  • These circles offer resistance to heat and humidity, which serves outdoor settings.
  • Werkstoff 2.0872 forgings show ductility and malleability for customised/specific applications.

Thickness chart of copper nickel 70-30 circle


Size 20 G. 19 G. 22 G. 26 G. 18 G. 24 G.
5 0-090 0-095 0-070 0-045 0-120 0-055
6 0-130 0-136 0-100 0-064 0-172 0-079
5.5 0-109 0-119 0-085 0-054 0-146 0-066
6.5 0-150 0-153 0-128 0-074 0-200 0-093
7.5 0.201 0.212 0-157 0-100 0.270 0-123
7 0-176 0-190 0-136 0-088 0-235 0-107
8 0-230 0-240 0-180 0-115 0-307 0-140
9 0-301 0-330 0-230 0-145 0-388 0-178
8.5 0-262 0-270 0-202 0-130 0-347 0-156
9.5 0-324 0-342 0-252 0-162 0-472 0-198
11 0-435 0-450 0-338 0-218 0-580 0-266
10 0-360 0-380 0-280 0-180 0-480 0-220
12 0-518 0-540 0-403 0-253 0-690 0-318
14 0-708 0-750 0-558 0-352 0-940 0-430
13 0-508 0-640 0-608 0-304 0-811 0-371
15 0-808 0-860 0-650 0-405 1-080 0-495
17 0-940 1-080 0-809 0-560 1-382 0-635
16 0-921 0-960 0-736 0-460 1-228 0-563
18 1-116 1-200 0-907 0-683 1-595 0-712
20 1-340 1-400 1-120 0-785 1-920 0-880
.4.5 0-080 0-085 0-062 0-040 .0-107 0.049
19 1-300 1-350 1-010 0-750 1-732 0-794

Types of cuni circle / forgings / rings


70/30 Copper Nickel Circles

70/30 Copper Nickel Circles

90/10 Copper Nickel Forgings

90/10 Copper Nickel Forgings

Copper Nickel 70/30 Rings

Copper Nickel 70/30 Rings

Copper Nickel 90/10 Circles

Copper Nickel 90/10 Circles

Check with us benefits of using copper Nickel 70/30 rings and UNS C70600 circle in various industries

What quality standards do your 70/30 copper nickel forgings products meet?

From power steering and brake lines to propeller sleeves, the applications of copper nickel 70/30 forgings are multifarious. The 70/30 material shows superior strength, corrosion resistance, and adaptability to higher flow rates. (However, 90/10 often gets chosen because of affordability.)

We follow international standards like ASTM, DIN, and Werkstoff for our cupronickel forgings. Our integrated quality control operates at each stage to ensure adherence to the specifications.

We also believe in intensive testing to help clients feel reassured of the safety and performance of UNS C71500 rings. Before dispatching the deliverables, our team guarantees necessary checks, including spectrometry, ultrasonic examination, IGC (intergranular corrosion test), and other quality tests. Customers can also request a third-party inspection for Werkstoff 2.0882 rings.

Benefits of UNS C70600 circle


  • → Superior mechanical characteristics
  • → Dimensional accuracy
  • → High density
  • → Excellent surface finishes
  • → Repeatability

Chemical composition of cunifer circle


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
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max
View our specifications to learn more about the quality of our Werkstoff 2.0872 forgings and UNS C71500 rings

Mechanical properties of copper nickel rings


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
90/10 2260°F 8.8g/cm3 50000 PSi 30% 20000PSi
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi
Our copper nickel 90/10 circle is an ideal choice for use in high-corrosion environments, see their advantages here

Advantages of copper nickel 90/10 circle


  • → Excellent resistance
  • → Seawater corrosion
  • → Low macrofouling rates
  • → Good fabricability

Equivalent properties of cupro nickel forgings


Grade UNS Werkstoff Nr.
90/10 C70600 2.0872
70/30 C71500 2.0882

Applications of copper nickel rings


  • → Industrial boilers
  • → Oil & gas industry
  • → Power plants
  • → Marine applications
  • → Refineries
  • → Nuclear plants
  • → Paper & pulp
  • → Heat exchangers

Test of copper nickel forgings


  • → Hydrostatic test
  • → PMI test
  • → Pitting resistance test
  • → IGC test
  • → Flattening/flaring test
  • → Radiography test
  • → Mechanical test
  • → Chemical analysis
  • → Hardness test
  • → Eddy current test
  • → Macro/micro test