CDA 862 Manganese Bronze Alloys

Specification :

CDA ASTM ASARCON SAE AMS Federal Military Other
C862 B505
B505M
430A
J461
J462
QQ-C-390, C4;
QQ-B-726, CLASS B
MIL-C-22229, COMP 9

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 3.00-
4.90
2.50-
5.00

Machinability :

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C862 30 0.288

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
90 621 45 310 18 180

Physical Properties :

Physical Properties provided by CDA * Field Strength 16 kA/m
US Customary Metric
Melting Point – Liquidus 1725 °F 941 °C
Melting Point – Solidus 1650 °F 899 °C
Density 0.288 lb/in3 at 68 °F 7.97 gm/cm3 at 20 °C
Specific Gravity 7.97 7.97
Electrical Conductivity 8% IACS at 68 °F 0.044 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 15000 ksi 103400 MPa
Magnetic Permeability* 1.24