ANSONIA COPPER & BRASS, INC.

 

COPPER ALLOY DATA SHEET

 

C70600 & C70620

 

Nominally composed of 88.6% copper, 10% nickel, and 1.4% iron, C70600 is a copper nickel alloy originally developed by the former Anaconda American Brass Company as an answer to the need for metal less costly than the richer copper nickel alloys, but still offering much of the properties characteristic of this alloy family.  C70600 thus offers, to a good degree, the properties inherent in Cupro Nickel 70/30 C71500, but with its reduced nickel content, a consequent reduction in comparable costs.  C70620 is the welding grade referenced in ASTM and military specifications.

 

C70600 is known for its moderate strength, weldability, and formability.  The inclusion of controlled quantities of iron also gives the alloy an extraordinary resistance to general corrosion and stress cracking, as well as to erosion and impingement due to turbulent water containing air bubbles and silt flowing at high velocities.

 

Hot Working:  C70600 has good hot and cold workability.

 

Joining:  Joining by soldering and brazing is excellent.  Joining by oxyacetylene and spot welding is fair, while excellent by gas shielded arc welding.  C70620 is one of the most weldable copper alloys and is readily joined by all arc processes.  The filler metal is a specially-alloyed 70/30 copper nickel composition.

 

Applications:  Although pre-eminently used in salt water lines because it is non-fouling, C70600 is not especially adapted to handle heavy polluted waters containing sewage and industrial wastes.  Instead, it finds its greatest application in marine service for shipboard plumbing systems, in nuclear power plants and tidewater steam power plants, in desalinization plants, in oil refineries for condensers and evaporators, and in the chemical processing industry.  Specific applications include heat exchanger shells, propeller sleeves, pump impellers for oil refining, salt water baffles, piling wrap, pipe fittings, and piping systems, flanges, and valve bodies.

 

Applicable Specifications:  When so specified, C70600 will be manufactured to the latest revision of the following specifications:  ASTM Specifications B151 for rod, B124 for forging rod, B466 for seamless pipe and tube, military specifications MIL‑C‑15726 and MIL‑T‑16420, and federal specifications.

 

Standard Forms Available:  Rod and tube.  For other forms, please contact Ansonia Copper & Brass, Inc.

 

ADS Nos. C70600 & C70620

Rev. No. 1

Rev. Date 4/23/99

(D19) C70600C70620

 

P. O. Box 109 - Ansonia, Connecticut 06401

725 Bank St. - Waterbury, Connecticut 06708

Tel.:  1-800-521-1703        FAX 203-735-3787

Tel.:  1-800-243-3204            FAX 203-756-1330

 

 

 

 
 
PROPERTIES OF C70600 & C70620                      

 

 

Nominal Composition:                      88.6% Copper

                                                               10% Nickel

                                                                1.4% Iron

 

Physical Properties:

 

         Melting Point (Liquidus):                                       1150°C (2100°F)

                                   (Solidus):                                       1100°C (2010°F)

         Density at 68°F:                                                     0.323 Lbs./In.3

         Coefficient of Thermal Expansion per °F:            9.5 x 10-6 (68-572°F)

         Electrical Conductivity at 68°F (volumetric):     9% IACS (in the annealed condition; lower in hard temper)

         Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F:   26

         Modulus of Elasticity - Tension:                             18,000 ksi

         Modulus of Rigidity:                                               6,800 ksi

 

Fabrication Properties:

 

            Hot Working Temperature:                   850-950°C (1150-1750°F)

            Annealing Temperature:                        600-825°C (1100-1500°F)

            Approximate Relative Machinability:    20 (Free cutting brass arbitrarily rated at 100)

 

Typical Mechanical Properties:

 

 

 

Size

Temper

Tensile Strength

(psi)

Yield Strength

.5% EUL (psi)

% Elongation

(in 2")

Rod Products

 

 

 

 

1"

Soft

51,000

28,000

37

1"

Hard

63,000

62,000

18

2"

Soft

50,000

29,000

36

3"

Soft

50,000

28,000

37

Tube Products

 

 

 

 

4.5"OD x .190" Wall

Soft

45,000

17,000

41

10.750"OD x .187" Wall

Soft

45,000

18,000

42

 

 

 

 

ADS No. C70600 & C70620

Rev. No. 1

Rev. Date 4/23/99

(D19) C70600C70620

 

The statements and data provided on this data sheet are to be considered only as a general guide.  Commercial variations in material properties are expected, so values listed here are not intended to be used for specifications.  Please consult the appropriate industry specifications where applicable.  Ansonia Copper & Brass, Inc. also cannot assume responsibility for performance of these products in service because we do not control or supervise subsequent use of our products.