C86400
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C70600

C86700

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Description

Copper Alloy No. C86700 is a free-machining, high-tensile (typically 85,000 psi) cast manganese bronze; it is also known as high-strength yellow brass. It has an excellent combination of strength and ductility and good resistance to corrosion in numerous environments, including seawater. Typical uses are valve stems, moderate-duty gears and marine components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties.

Builders HardwareFastenersIndustrialMarine
BracketsScrew Down NutsBearingsMarine Hardware
CamsPropellers
Fittings
Lever Arms
Machinery Parts
Moderate Duty Gears
Propellers
Valve Stems

COMMON FABRICATION PROCESSES

COMMON FABRICATION PROCESSES

  • No fabrication process properties for this alloy
CHEMICAL COMPOSITION

CHEMICAL COMPOSITION

Elements
Cu(1,2) Pb Sn Zn Fe Ni(3) Al Mn
(1) In determining Cu min., Cu may be calculated as Cu + Ni.
(2) Cu + Sum of Named Elements 99.0% min.
(3) Ni value includes Co.
Min (%) 55.0 0.50 30.0 1.0 1.0 0.10
Max (%) 60.0 1.5 1.5 38.0 3.0 1.0 3.0 3.5
MECHANICAL PROPERTIES

MECHANICAL PROPERTIES

Form Temper Temper Code Tensile Strength
(ksi)		 YS-0.5% Ext
(ksi)		 Elongation
(%)		 Rockwell B scale Brinell Hardness, 3000 kg load
* Measured at room temperature, 68°F (20°C).
As Centrifugal Cast As Centrifugal Cast M02 80 Min for Standard 32 Min for Standard 15 Min for Standard
As Sand Cast As Sand Cast M01 80 Min for Standard
85 Typ		 32 Min for Standard
42 Typ		 15 Min for Standard
20 Typ		 80 Typ 155 Typ
PHYSICAL PROPERTIES

PHYSICAL PROPERTIES

Melting Point – Liquidus°F 1616
Melting Point – Solidus°F 1583
Densitylb/cu in. at 68°F 0.301
Specific Gravity 8.33
Electrical Conductivity% IACS at 68°F 17
Coefficient of Thermal Expansion 68-39210 to -6 power per °F (68 – 392°F) 11
Specific Heat CapacityBtu/ lb /°F at 68°F 0.09
Modulus of Elasticity in Tensionksi 15000
FABRICATION PROPERTIES

FABRICATION PROPERTIES

Technique Suitability
Soldering Fair
Brazing Fair
Oxyacetylene Welding Poor
Gas Shielded Arc Welding Poor
Coated Metal Arc Welding Poor
Machinability Rating 55
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 Sand Cast Castings ASTM B584 COPPER ALLOY SAND CASTINGS FOR GENERAL APPLICATIONS
Castings ASTM B763/B763M COPPER ALLOY SAND CASTINGS FOR VALVE APPLICATIONS
Ingot ASTM B30 COPPER BASE ALLOYS IN INGOT FORM