CDA 838 Red Brass Bronze Alloys

Specification :

CDA ASTM Asarcon SAE AMS Federal Military Other
C838 B505
B505M
B145-4B
46 4855 QQ-C-390, B4;
QQ-B-1005, COMP 17
Hydraulic Bronze

Chemical Composition :

Cu%1 Pb% Sn% Zn% Fe% P% Ni%2 Al% S% Sb% Si%
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.
82.00-
83.80
5.00-
7.00
3.30-
4.20
5.00-
8.00
0.30 0.03 1.00 0.005 0.08 0.25 0.005

Fabrication Properties :

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

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
30 207 15 97 16 60

Physical Properties :

Physical Properties provided by CDA
US Customary Metric
Melting Point – Liquidus 1840 °F 1004 °C
Melting Point – Solidus 1550 °F 843 °C
Density 0.312 lb/in3 at 68 °F 8.64 gm/cm3 at 20 °C
Specific Gravity 8.64 8.64
Electrical Conductivity 15% IACS at 68 °F 0.087 MegaSiemens/cm at 20 °C
Thermal Conductivity 41.8 Btu/sq ft/ft hr/°F at 68 °F 72.4 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 13300 ksi 91700 MPa
Magnetic Permeability 1 1