• An ISO 9001:2015 Certified Company
  • Call

    +91 9930108105

  • Address

    Sanghvi Galaxy, Shop No.2, Khetwadi
    10th Lane, Mumbai-400004, India

Copper Nickel Forged Fittings

Copper nickel forged fittings specifications

What are the advantages of using Copper Nickel Forged Fittings ?

These products are composed of copper and nickel, with impactful inclusions of iron and manganese. Copper nickel forged fittings are best suited to high pressures and temperatures (800 to 900°C), exhibiting trustworthy performance in marine and chemical industries.

  • Withstands erosion, biofouling, and ammonia in seawater
  • Cupro nickel bushing resists chloride-ion stress cracking
  • Have a high PREN of 37
  • Can face non-oxidising acids and salts
  • Copper nickel socket weld fittings resist impingement corrosion
  • Durable, with long service life and negligible maintenance

CuNi threaded fittings also work in water desalination and power generation.

Copper nickel threaded fittings supplier in India


Specification of copper nickel forged fittings

Specifications Size End
ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 1/8" – 4" Threaded, JIC, Welding
Pressure rating Thread Types
2000 LBS, 6000 LBS, 3000 LBS, 9000 LBS NPT, BSPP, BSPT Forged fittings, socket weld fittings, threaded fittings, threaded elbow, union, coupling
Connection of DIN 2.0872 socket weld elbow Process of UNS C71500 threaded fittings Surface roughness of CUNI forged fittings
Compressed Forging / CNC machining Ra 3.2-6.3 for die cast items

We provide the best quality cupro nickel socket weld fittings, to check our inventory visit us

Which corrosion testing methods evaluate the corrosion resistance of Copper Nickel Forged Fittings?

Intergranular corrosion (IGC) and pitting resistance tests are mandatory for cupro nickel threaded fittings. Salt sprays, electrochemical processes, and visual inspection ensure fitment to challenging environmental conditions.

Copper nickel 70/30 forged fittings also undergo non-destructive assessments like ultrasonic testing to detect discontinuities, and corrosive damage. Careful monitoring during quality checks safeguards results from:

  • Humidity
  • Severe temperatures
  • Impurities and pollution
  • Contact with dissimilar or reactive metals

Types of cupro nickel socket weld fittings


Cunifer Socket Weld Fittings

Cunifer Socket Weld Fittings

Copper Nickel Forged Fittings

Copper Nickel Forged Fittings

Cuni 90/10 Socket Weld Fittings

Cuni 90/10 Socket Weld Fittings

Cuni Threaded Fittings

Cuni Threaded Fittings


To view the range of sizes we offer for copper nickel 70/30 forged fittings, refer our specification tables

What are the thermal conductivity properties of Copper Nickel Forged Fittings?

Thermal conductivity, measured in watts per metre-kelvin, denotes the ability to conduct and transfer heat. A 90/10 Cuni socket weld union shows desirable thermal properties, boasting a conductivity of 17.5 W/(m·K) at 20°C.

In comparison, steel is a poor thermal conductor. The conductivity of Inconel is around 5.8, while Hastelloy comes in at 9.8 W/m-K.

An ASTM B467 UNS C71500 socket weld elbow, which uses a 70/30 copper-nickel constitution, has an even higher value of 29 W/(m·K). These favourable properties emanate from its constituents – nickel and copper – which are both good conductors of heat.

Thermal applications like heat exchangers, condensers, heat sinks, etc., covet these characteristics. A UNS C70600 DIN 2.0872 socket weld coupling retains ductility and conductivity at low temperatures.

Chemical composition of CUNI threaded fitting


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
Buy here a top-quality ASTM B467 UNS C71500 socket weld elbow at a very reasonable price in India

Mechanical properties of copper nickel coupling


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
Before you order check our UNS C70600 socket weld coupling chemical composition and mechanical properties

Equivalent properties of CUNI unioun


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

Dimensions chart of copper nickel socket weld fittings


NPS Socket Bore Bore diameter Depth Socket Body wall thickness Socket wall thickness Center to bottom of socket A
B D J G C 45°
1 34.05 33.80 27.4 25.9 13 4.55 5.70 5.00 14
3/4 27.30 27.05 21.7 20.2 13 3.90 4.90 4.25 12.5
42.80 42.55 35.8 34.3 13 4.85 6.05 5.30 17
1/2 21.95 21.70 16.6 15 10 3.75 4.65 4.10 11.5
2 61.35 61.10 53.5 51.7 16 5.55 6.95 6.05 25
48.90 48.65 41.7 40.1 13 5.10 6.35 5.55 21
74.20 73.80 64.2 61.2 16 7.00 8.75 7.65 29
4 115.80 115.45 103.8 100.7 19 8.55 10.70 9.35 41.5
3 90.15 89.80 79.5 46.4 16 7.60 9.50 8.30 31.5

Applications of cupro nickel threaded fittings


  • Shipbuilding ( special marine vessels)
  • Chemical process industries
  • Offshore (various navy projects)
  • Oil refineries
  • Condensers
  • Desalination plants
  • Power Plants
  • Desalination plants

Size chart of UNS C70600 threaded tee


Description Class designation
6000 3000 9000
Cuni forged fittings size
by wall thickness
SCH 160 SCH 80 / XS XXS
Elbows 45° and 90°
tee,half-couplings, crosses, couplings,
end / pipe caps
1/2 – 2 1/2 – 4 1/2 – 2
1/2 – 2 1/2 – 4 1/2 – 2
1/2 – 2 1/2 – 4 1/2 – 2

Value added services of ASTM B467 UNS C71500 socket weld elbow


  • Cladding
  • Minor fabrication
  • Heat treatment
  • Forging
  • Bending
  • Annealed
  • Pickling / polish
  • Cutting
  • Rolling

Material testings of copper nickel 70/30 forged fittings


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