C72900
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1.2379 (CPPU)

C97800

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Description

UNS C97800 alloy is a leaded nickel bronze copper alloy. Other types of bronze alloys include phosphor bronze, tin bronze,

aluminum bronze, silicon bronze, architectural bronze and manganese bronze.

ArchitectureBuilders HardwareConsumerIndustrial
Ornamental CastingsHardwareMusical Instruments ComponentsFittings for Diary and Food Processing
Valves
COMMON FABRICATION PROCESSES

COMMON FABRICATION PROCESSES

  • No fabrication process properties for this alloy
CHEMICAL COMPOSITION

CHEMICAL COMPOSITION

Elements
Cu(1) Pb Sn Zn Fe P Ni(2) Al Mn S Sb Si
(1) Cu + Sum of Named Elements 99.6% min.
(2) Ni value includes Co.
Min (%) 64.0 1.0 4.0 1.0 24.0
Max (%) 67.0 2.5 5.5 4.0 1.5 0.05 27.0 0.005 1.0 0.08 0.20 0.15
MECHANICAL PROPERTIES

MECHANICAL PROPERTIES

Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.5% Ext
(ksi)		 Elongation
(%)		 Brinell Hardness, 3000 kg load
* Measured at room temperature, 68°F (20°C).
As Centrifugal Cast As Centrifugal Cast M02 50 Min for Standard 22 Min for Standard 10 Min for Standard
As Continuous Cast As Continuous Cast M07 45 Min for Standard 22 Min for Standard 8 Min for Standard
As Sand Cast As Sand Cast M01 50 Min for Standard
55 Typ		 22 Min for Standard
30 Typ		 10 Min for Standard
15 Typ		 130 Typ
PHYSICAL PROPERTIES

PHYSICAL PROPERTIES

Melting Point – Liquidus°F 2156
Melting Point – Solidus°F 2084
Densitylb/cu in. at 68°F 0.32
Specific Gravity 8.86
Electrical Conductivity% IACS at 68°F 4
Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F 14.7
Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) 9.7
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 19000
FABRICATION PROPERTIES

FABRICATION PROPERTIES

Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended
Machinability Rating 60
APPLICABLE SPECIFICATIONS

APPLICABLE SPECIFICATIONS

Form Specific Sub-Form Application System Standard Description
As Centrifugal Cast Castings ASTM B271/B271M COPPER BASE ALLOY CENTRIFUGAL CASTINGS
As Continuous Cast Castings ASTM B505/B505M COPPER BASE ALLOY CONTINUOUS CASTINGS
As Sand Cast Castings ASTM B763/B763M COPPER ALLOY SAND CASTINGS FOR VALVE APPLICATIONS
Castings ASTM B584 COPPER ALLOY SAND CASTINGS FOR GENERAL APPLICATIONS
Ingot ASTM B30 COPPER BASE ALLOYS IN INGOT FORM
Valves MILITARY MIL-V-18436 VALVES, CHECK, BRONZE