C86300 Material Data Sheet

UNS C86300 (SAE 430B) Manganese Bronze is a high strength copper alloy intended for use in applications requiring good wear characteristics and high bearing strength for heavy loads and slow speeds. Typical applications include but are not limited to slow speed heavy duty load bearings, gears, cams and hydraulic cylinder parts. Conforms to continuous cast specification ASTM B-505.

 

Chemical Properties -- C86300 Bronze / SAE 430 B / Manganese Bronze

Element

Nominal %

Minimum %

Maximum %

Aluminum

6

5

7.5

Antimony

-

-

-

Copper

63

60

66

Iron

3

2

4

Lead

-

-

0.2

Nickel

-

-

1

Manganese

3

2.5

5

Silicon

-

-

-

Sulfur

-

-

-

Tin

-

-

0.2

Zinc

25

22

28

 

Mechanical Properties -- C86300 Bronze / SAE 430 B / Manganese Bronze

MO1 - As Sand Cast

 

Tensile Strength:

Minimum 119 ksi

Yield Strength:

Minimum 62 ksi - 0.5% Ext. under load

Elongation:

Minimum 18% in 2 in.

Brinell Hardness:

225 @ 3000 kg load

 

 

M02 - As Centrifugal Cast

 

Tensile Strength:

Minimum 110 ksi

Yield Strength:

Minimum 624 ksi - 0.5% Ext. under load

Elongation:

12% in 2 inches

 

 

M07 - As Continuous Cast

 

Tensile Strength:

Minimum 110 ksi

Yield Strength:

Minimum 62 ksi - 0.5% Ext. under load

Elongation:

14% in 2 inches

 

Physical Properties -- C86300 Bronze / SAE 430 B / Manganese Bronze

Property

US Customary

Melting Point - Liquidus

1693 F

Melting Point - Solidus

1625 F

Density

0.283 lb/in3 at 68 F

Specific Gravity

7.83

Specific Heat Capacity

0.09 Btu/lb/oF at 68 F

Coefficient of Thermal Expansion

12.0 ·10-6 per oF (68-212 F)

Thermal Conductivity

20.5 Btu · ft/(hr · ft2·oF)at 68F

Electrical Conductivity

8 %IACS @ 68 F

Electrical Resistivity

130.8 ohms-cmil/ft @ 68 F

Modulas of Elasticity in Tension

14,200 ksi

 

Fabrication Properties -- C86300 Bronze / SAE 430 B / Manganese Bronze

Joining Methods

Suitability

Soldering

Poor

Brazing

Poor

Oxyacetylene Welding

Poor

Gas Shielded Arc Welding

Poor

Coated Metal Arc Welding

Good

Machinability (C360 Brass =100)

20