MaterialPedia

Copper Alloy

High Tensile Manganese Bronze -Manganlı Bronz , SAE 430B , CDA 863

Chemical Composition % by weight

Element	Nominal	Minimum	Maximum
Aluminum-Aliminyum	6	5	7.5
Copper-Bakır	63	60	66
Iron	3	2	4
Lead	-	-	.20
Manganese	3	2.5	5
Nickel-Nikel	-	-	1
Tin	-	-	.20
Zinc	25	22	28

Applications

Extra heavy duty high strength alloy for large valve stems, gears, cams, slow speed heavy load bearings, screw down nuts, hydraulic cylinder parts

Mechanical Properties

M07 - As Continuous Cast

Hardness*	Brinell Hardness (3000 kg load)	225
Tensile Strength**	KSI	110 min
Yield Strength **	KSI (0.5% Ext. under load)	62 min
Elongation**	% in 2 inch	14

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	20.5
Specific Heat	BTU/lb/ºF @ 68F	.09
Thermal Expansion	Per °F from 68 F to 500 F	.000012
Density	lb/cu in @ 68 F	.283
Electrical Conductivity* (Annealed)	% IACS @ 68 F	8
Modulus of Elasticity	KSI	14,200

*Volume basis

Fabrication Practices

Stress relieving temperature	500 F or 260 C
Time at temperature	1 hour per inch of section thickness
Responds to heat treatment	No
Machinability rating (Free Cutting Brass=100)	20
Suitability for being joined by:	Soldering/Poor
	Brazing/Poor
	Oxyacetylene Welding/Poor
	Gas Shielded Arc Welding/Poor
	Coated Metal Arc Welding/Good

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.