CDA 863 Manganese Bronze Alloys

Specification :

CDA ASTM Asarcon SAE AMS Federal Military Other
C863 B505
B505M
430B
J461
J462
QQ-C-390B, C7 MIL-C-22229, COMP 8

Chemical Composition :

Cu%1 Pb% Sn% Zn% Fe% Ni%2 Al% Mn%
Chemical Composition according to ASTM B505/B505M-18
1In determining Cu min., Cu may be calculated as Cu + Ni.  2Ni value includes Co.
Single values represent maximums.
60.00-
66.00
0.20 0.20 22.00-
28.00
2.00-
4.00
1.00 5.00-
7.50
2.50-
5.00

Machinability : 

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C863 8 0.283

Mechanical Properties :

Mechanical Properties according to ASTM B505/B505M-18  NOTE: Compression Deformation Limit min 55 ksi/380 MPa
Tensile Strength, min Yield Strength, at .5% Extension Under Load, min Elongation, in 2 in. or 50 mm min Brinell Hardness (3000 kg load) Remarks
ksi MPa ksi MPa % typical BHN
110 758 62 427 14 223

Physical Properties :

Physical Properties provided by CDA  *Field Strength 16 kA/m
US Customary Metric
Melting Point – Liquidus 1693 °F 923 °C
Melting Point – Solidus 1625 °F 885 °C
Density 0.283 lb/in3 at 68 °F 7.83 gm/cm3 at 20 °C
Specific Gravity 7.83 7.83
Electrical Conductivity 8% IACS at 68 °F 0.046 MegaSiemens/cm at 20 °C
Thermal Conductivity 20.5 Btu/sq ft/ft hr/°F at 68 °F 35.5 W/m at 20 °C
Coefficient of Thermal Expansion 68-572 12 · 10-6 per °F (68-572 °F) 20.7 · 10-6 per °C (20-300 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 C
Modulus of Elasticity in Tension 14200 ksi 97900 MPa
Magnetic Permeability* 1.09 1.09

Fabrication Properties :

Fabrication Properties provided by CDA
Joining Technique Suitability
Soldering Poor
Brazing Poor
Oxyacetylene Welding Poor
Gas Shielded Arc Welding Poor
Coated Metal Arc Welding Good

Thermal Properties :

Treatment Temp./Time – US Temp./Time – SI
Thermal Properties provided by CDA
Stress Temperature 500 260
Solution Minimum
Solution Maximum
Solution Time 0.0
Solution Medium
Precipitation Value
Precipitation Time
Precipitation Medium
Annealing Minimum
Annealing Maximum
Annealing Time
Hot Works Minimum
Hot Works Maximum