C86700

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 Hardware	Fasteners	Industrial	Marine
Brackets	Screw Down Nuts	Bearings	Marine Hardware
		Cams	Propellers
		Fittings
		Lever Arms
		Machinery Parts
		Moderate Duty Gears
		Propellers
		Valve Stems

COMMON FABRICATION PROCESSES

No fabrication process properties for this alloy

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

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

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

Technique	Suitability
Soldering	Fair
Brazing	Fair
Oxyacetylene Welding	Poor
Gas Shielded Arc Welding	Poor
Coated Metal Arc Welding	Poor
Machinability Rating	55

APPLICABLE SPECIFICATIONS

Form	Specific Sub-Form	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
As Sand Cast	Castings	ASTM	B763/B763M	COPPER ALLOY SAND CASTINGS FOR VALVE APPLICATIONS
Ingot		ASTM	B30	COPPER BASE ALLOYS IN INGOT FORM