Welcome to Tech Tubes & Fittings: India's #1 Supplier For Instrumentation Fittings, Pipes, And Valves

We are a leading instrumentation tube fittings manufacturer in India. We supply a wide range of valves, tubes, and fittings. Browse our product catalogue now.


  • Copper Nickel Flanges, Cupro Nickel Flanges, Cupro Nickel 90-10, Cupro Nickel 70-30, Copper Nickel 90-10, Copper Nickel 70-30,
    UNS C70600 Flanges, UNS C71500 Flanges, UNS C71640 Flanges, 
    Cu-Ni Flanges, Cupro Nickel Flange Manufacturers 



  • Forged Flange
  • Plate Flange


  • Slip on, Blind, Weld Neck, Socketweld, Threaded and Lap Joint Flanges
  • Orifice Flanges with Plates if needed
  • RTJ (Ring Type Joint) Facing
  • Rings - R Type, RX Type, BX Type
  • Spectacle Blinds
  • Long Weld Neck Flange
  • Paddle Spaces & Blinds


  • 1/2" NB ( 15 mm NB ) to 32" NB ( 800 mm NB )


  • 75# to 2500# 

DIMENSIONS in accordance with

  • ASME B 16.5
  • ASME B 16.47
  • BS EN 1092-1
  • BS 10 Table D,E,F,H
  • ASME B 13.36
  • ASME B 16.48
  • JIS 5K, 10K
  • Customer Drawing

Copper Nickel Pipe

Copper Nickel Pipe Flanges, which has some best features to offer such as sturdy construction, high tensile strength, accurate dimensions, and more. Cupro Nickel Slip On Flanges UNS C70600 have good strength at moderately elevated temperatures. 

Cupro Nickel Threaded Flanges fittings, flanges and various other marine hardware components. Cupro Nickel  Weld Neck Flanges offers designers and specifiers excellent resistance to stress corrosion, erosion, and biofouling in seawater and brackish water, excellent fabrication and welding properties, a high resistance to hydrogen embrittlement and the retention of mechanical properties down to cryogenic temperatures. Meanwhile, Cupro Nickel Blind Flanges are also being offered in different sizes and shapes to our customers. Besides of other elements, nickel in Cupro Nickel Socket Weld Flanges are added in the highest concentration after copper. 
Cupro Nickel  Lap Joint Flanges are widely used as they are inexpensive, and can be used in pressure vessel construction up to 300 Degree C.

tech tubes & fittings Cupro Nickel Slip on Flanges, Cupro Nickel Blind Flanges, Cupro Nickel Weld Neck Flanges, Cupro Nickel Socket Weld Flanges, Cupro Nickel Threaded Flanges, Cupro Nickel Lap Joint Flanges, and much more. We make use of cutting-edge devices and machines for preparing the flanges that are used in the industries.
Further, we also stay aware to adhere ourselves to the quality standards of the manufacturing processes,so as to achieve the wants and needs set by our customers.

Tech Tubes & Fittings deals in a variety of Cupro Nickel Flanges or Copper Nickel Flanges as per international standards and dimensions. We are a ISO 9001: 2015 registered company and have been exporting these Flanges to various countries around the globe. Client satisfaction for us is of prime importance and we do not have the mindset to not deal in small orders or deal in only orders with a higher value. For our client we go as flexible as they want us to with respect to Quantities and requirements.

 “Right product for the right requirement at the right price” i.e., rather than a mere supplier of the product we take utmost efforts in understanding the client's requirement, identifying the right product at the right price. This has resulted in close ties with major customers within India & World-wide.

Tech  Tubes & Fittings is a acclaimed Cupro Nickel Forged Flange manufacturers in India which has no Minimum Order Quantity requirements. Products like Cupro Nickel Flanges, Copper Nickel Flanges are manufactured by Tech Tubes & Fittings. We have expertise in Cupro Nickel UNS C70600 Flanges, Copper Nickel C71500 Flanges, Cupro Nickel Plate Flanges, Cupro Nickel 90-10 Flange, Cupro Nickel 70-30 Flanges, Cupro Nickel Forged Flanges

                  CORNO SLIP ON FLANG
                 BLIND FLANGE
                WELD NECK FLANGE
                 SOCKET WELD FLANGE
                THREADED FLANGE
                 LAP JOINT FLANGE
               ORIFICE FLANGE
                  SPECTACLE BLIND FLANGE
                   LONG WELD NECK FLANGE
                  NIPO FLANGE   


Copper Nickel 90/10 Flanges

90/10 cupronickel is a 90% copper, 10% nickel alloy that also contains small but important additions of iron and manganese to enhance overall strength corrosion resistance. This, combined with high ductility and toughness, makes it a popular grade for marine, architectural and industrial applications.

Cupro Nickel 90/10 Flanges offers designers and specifiers excellent resistance to stress corrosion, erosion, and biofouling in seawater and brackish water, excellent fabrication and welding properties, a high resistance to hydrogen embrittlement and the retention of mechanical properties down to cryogenic temperatures.

The material is released to the Defence Standard DEF STAN 02-879 Annex C, which supersedes both DEF STAN 02-779 and NES 779.

The most popular specifications in Europe and America are C70600, CN102 and CW352. These grades are most commonly specified within the marine, offshore, chemical, petrochemical and shipbuilding industries and are also widely used for handling seawater in all types of heat exchangers and cooling plants.

Copper Nickel 90/10 has undergone tests that indicate it has excellent antimicrobial properties. It is capable of killing 99.9% of a wide range of organisms within two hours, including MRSA, E.coli, influenza A (H1N1) and clostridium difficile. This has created a higher demand for the alloy in application areas such as hygienic and sanitary environments in hospitals, kitchens, nursing homes and other healthcare environments.

Related Specifications

  • CN102
  • C70600
  • C70610
  • CW352H
  • DEF STAN 02-879 Annex C
  • DEF STAN 02-779
  • NES 779
  • BS2870
  • BS2874
  • ASTM B151
  • EN 12163
  • 2.0872
  • NF A51-115
  • CuNi10Fe1Mn

Nominal Composition

Cu rem, Ni 10.0%, Fe 1.5%, Mn 0.7%

Mechanical Properties

Ultimate Tensile Strength (N/mm²) Proof Stress (N/mm²) Elongation (%) Hardness (HB)

Key Features

  • High ductility and toughness
  • Excellent resistance to erosion and corrosion in seawater
  • Inherent resistance to biofouling
  • Excellent fabrication and welding properties
  • Retention of mechanical properties down to cryogenic temperatures

Applications of Cupro Nickel Flanges

Offshore & marine | Saltwater pipes and fittings, hot water tanks, saltwater baffles, propeller sleeves, valve and pump components, flanges, boat hulls, marine fittings and marine hardware

Chemical processing | Heat exchanger and cooling plant, evaporator tubes, pump and valve trim

Other | Power steering tube, brake lines, condenser plates, pressure vessels and distiller tubes

 Related SpecificationsMechanical Properties
Alloy NameBSUNSBS ENOthersUltimate Tensile Strength N/mm²Minimum Yield Strength N/mm²Elongation %Hardness HB 
Co­pp­er Ni­ck­el 90­/1­0CN­10­2C7­06­00­; C7­06­10CW­35­2H2.­08­7228­010­52770-12­0
Co­pp­er Ni­ck­el 70­/3­0 / NE­S 78­0CN­10­7C7­15­00­; C7­15­20CW­35­4HNE­S7­8031­0 2780-12­0
DE­F ST­AN 02-83­5 C7­24­20 DG­S3­5771­0-72­540­0-43­018-22 
NI­BR­ON SP­EC­IA­L®DT­D9­00­/4­80­5C7­24­00 2.­15­0477­0-85­055­5-63­01222­9-24­0
DT­D4­98 / BS­B2­5DT­D4­98C6­47­00CW­11­1CBS­B2­558­043­01815­9-20­7H­V 
CO­LS­IB­RO­®DT­D4­98C6­47­00­; C1­80­00CW­11­1C2.­08­5555­0-64­043­0-59­01015­5-18­0
TR­OJ­AN C7­02­50­; C7­02­52CW­11­2C2.­08­5769­0-80­057­0-75­01019­0-20­0
BE­CO­L-25CB­10­1C1­72­00CW­10­1CAS­TM B1­96­; CD­A 17­20­0    
CH­RO­MZ­IR­C-3CC­10­1C1­82­00CW­10­5CBS 45­77 A/­2/­145­040­02014­0H­V
CH­RO­MZ­IR­C-32­8CC­10­2C1­81­50CW­10­6CBS­45­77 A/­2/­2; IS­O5­18­245­040­02014­0H­V
CO­LD­UR-A®CS­10­1C6­55­00­; C6­56­00CW­11­6CAS­TM B9­8; AS­TM B2­4948­526­020 
CO­LD­UR-B C6­51­00CW­11­5CAS­TM B9­848­526­020


  • UNS C70600 Flanges 
  • Cupro Nickel Weld Neck RF Flanges
  • Cupro Nickel Slip On RF Flanges
  • Cupro Nickel Blind RF Flanges
  • Cupro Nickel RTJ Flanges
  • Cupro Nickel SORTJ Flanges 
  • Cupro Nickel WNRTJ Flanges
  • Cupro Nickel BLRTJ Flanges 
  • Cupro Nickel SWRTJ Flanges
  • Cupro Nickel Lap Joint Flanges 
  • Cupro Nickel Nipo Flanges
  • Cupro Nickel Spectacle Blind Flanges  
  • Cupro Nickel Figure 8 Flanges
  • Copper Nickel Paddle Spaces & Blanks
  • Copper Nickel Orifice Flanges
  • Copper Nickel NPT Threaded Flanges 
  • Copper Nickel Socket Weld Flanges
  • Copper Nickel ASME B16.5 Flanges
  • Copper Nickel ASME B16.36 Flanges
  • Copper Nickel ASME B16.48 Flanges
  • Copper Nickel ASME B16.48 Series A Flanges
  • Copper Nickel ASME B16.48 Series B Flanges
  • Copper Nickel JIS Flanges 
  • Cupro Nickel BS 10 Table D Flanges
  • Cupro Nickel BS 10 Table E Flanges
  • Cupro Nickel BS 10 Table F Flanges
  • Cupro Nickel BS 10 Table H Flanges 
  • Cupro Nickel PN 10 Flanges
  • Cupro Nickel PN 16 Flanges
  • Cupro Nickel PN 40 Flanges
  • Cupro Nickel DIN Flanges  
  • Cupro Nickel UNS C71500 Flanges
  • Cupro Nickel UNS C71640 Flanges
  • Cupro Nickel Flanges
  • Copper Nickel Flanges 
  • Copper Nickel 90-10 Flanges
  • Copper Nickel 70-30 Flanges 
  • Cupro Nickel 70-30 Flanges 
  • Cupro Nickel 90-10 Flanges


  • UNS C70600 Flanges  
  • UNS C71500 Flanges 
  • UNS C71640 Flanges
  • Cupro Nickel 90-10 Flanges
  • Cupro Nickel 70-30 Flanges 


All registered names, trademarks, copyrights and part numbers like Inconel, Monel, Hastelloy, Zeron etc., remain the property of their respective owners. All use of OEM names, part, model and item numbers are for reference and identification purposes only. TECH TUBES & FITTINGS is not an endorsed reseller or representative of any of above listed Materials / Brands or their respective products. TECH TUBES & FITTINGS products do not infringe on Trade Marks Act 1995 or Copyright Act 1968, and to the best of our knowledge and through investigation we are not in contravention of any current patents