C93400 / CDA 934 Leaded Tin Bronze Alloys

Specification :

CDA ASTM Asarcon SAE AMS Federal Military Other
C934 B505
B505M
88 QQ-C-390, E8;
QQ-B-1005, COMP 8
MIL-B-11553, COMP 8

Chemical Composition :

Cu%1 Pb% Sn% Zn% Fe% P%2 Ni%3 Al% S% Sb% Si%
Chemical Composition according to ASTM B505/B505M-18
1In determining Cu min., Cu may be calculated as Cu + Ni.   2For continuous castings, P shall be 1.5%, max.   3Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.0% min. Single values represent maximums.
82.00-
85.00
7.00-
9.00
7.00-
9.00
0.80 0.20 0.50 1.00 0.005 0.08 0.50 0.005

Machinability :

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C934 70 0.32

Mechanical Properties :

Mechanical Properties according to ASTM B505/B505M-18
Tensile Strength, min Yield Strength, at .5% Extension Under Load, min Elongation, in 2 in. or 50 mm min Brinell Hardness (500 kg load) Remarks
ksi MPa ksi MPa % typical BHN
34 234 20 138 8 60

Physical Properties :

Physical Properties provided by CDA
US Customary Metric
Density 0.32 lb/in3 at 68 °F 8.86 gm/cm3 at 20 °C
Specific Gravity 8.86 8.86
Electrical Conductivity 12% IACS at 68 °F 0.07 MegaSiemens/cm at 20 °C
Thermal Conductivity 33.6 Btu · ft/(hr · ft2 · °F) at 68 °F 58.2 W/m at 20 °C
Coefficient of Thermal Expansion 10 · 10-6 per °F (68-392 °F) 17.3 · 10-6 per °C (20-200 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 °C
Modulus of Elasticity in Tension 11000 ksi 75800 MPa

Fabrication Properties :

Fabrication Properties provided by CDA
Joining Technique Suitability
Soldering Good
Brazing Good
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Not Recommended
Coated Metal Arc Welding Not Recommended

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