CDA 865 Manganese Bronze Alloys

Specification :

CDA ASTM Asarcon SAE AMS Federal Military Other
C865 B505
B505M
J461
J462
4860 QQ-C-390, C3
QQ-B-726, CLASS A
MIL-C-22229, COMP 7

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.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.
55.00-
60.00
0.40 1.00 36.00-
42.00
0.40-
2.00
1.00 0.50-
1.50
0.10-
1.50

Machinability :

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C865 26 0.301

Mechanical Properties :

Mechanical Properties according to ASTM B505/B505M-18
Tensile Strength, min Yield Strength, at .5% Extension Under Load, min Elongation, in 2in. or 50mm min Brinell Hardness (3000 kg load) Remarks
ksi MPa ksi MPa % typical BHN
70 483 25 172 25 130

Physical Properties :

Physical Properties provided by CDA * Field Strength 16 kA/m
US Customary Metric
Melting Point – Liquidus 1616 °F 880 °C
Melting Point – Solidus 1583 °F 862 °C
Density 0.301 lb/in3 at 68 °F 8.33 gm/cm3 at 20 °C
Specific Gravity 8.33 8.33
Electrical Conductivity 22% IACS at 68 °F 0.128 MegaSiemens/cm at 20 °C
Thermal Conductivity 49.6 Btu/sq ft/ft hr/°F at 68 °F 85.8 W/m at 20 °C
Coefficient of Thermal Expansion 68-212 11.3 · 10-6 per °F (68-212 °F) 19.5 · 10-6 per °C (20-100 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 °C
Modulus of Elasticity in Tension 15000 ksi 103400 MPa
Magnetic Permeability* 1.09 1.09

Fabrication Properties :

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

Thermal Properties :

Thermal Properties provided by CDA
Treatment Temp./Time – US Temp./Time – SI
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