C69400

Reference guide

C69400

Product description: Silicon red brass
Tempers: H04 hard
Solids: 3/8" to 2" O.D.
Hex: 3/8" to 2" O.D.
Standard lengths: 144"

Typical uses

Industrial: Valve stems

Similar or equivalent specification

CDA ASTM SAE AMS Federal Military Other
C69400 B371
B371M
         

Chemical composition

Cu%1 Pb% Zn% Fe% Si%
Chemical composition according to ASTM B371/B371M-19

1Cu value includes Ag.
Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
80.00-
83.00
 
0.30
 
Rem.
 
0.20
3.50-
4.50

Machinability

Copper alloy UNS No. Machinability rating Density (lb/in3 at 68 °F)
C69400 30 0.296

Mechanical properties

Mechanical properties according to ASTM B371/B371M-19

C69400

H04 HARD

Size range: up to 1" inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, in 4x diameter or thickness of specimen, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical BHN  
80 550 40 250 15 95  
Size range: over 1" to 2" inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, in 4x diameter or thickness of specimen, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical BHN  
75 515 35 241 15 95  
Size range: over 2"
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, in 4x diameter or thickness of specimen, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical BHN  
65 450 35 241 15 95  

Physical properties

Physical properties provided by CDA
  US Customary Metric
Melting point - liquidus 1685 °F 918 °C
Melting point - solidus 1510 °F 821 °C
Density 0.296 lb/in3 at 68 °F 8.19 gm/cm3 at 20 °C
Specific gravity 8.19 8.19
Electrical conductivity 6.2% IACS at 68 °F 0.04 MegaSiemens/cm at 20 °C
Thermal conductivity 15 Btu/sq ft/ft hr/°F at 68 °F 25.98 W/m at 20 °C
Coefficient of thermal expansion 68-572 11.2 · 10-6 per °F (68-572 °F) 19.3 · 10-6 per °C (20-300 °C)
Specific heat capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 20 °C
Modulus of elasticity in tension 16000 ksi 110310 MPa

Fabrication properties

Fabrication properties provided by CDA
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene welding Good
Spot weld Good
Seam weld Good
Butt weld Good
Capacity for being cold worked Poor
Capacity for being hot formed Excellent
Forgeability Rating 80
Machinability rating 30

Thermal properties

Thermal properties provided by CDA
*Temperature is measured in Fahrenheit.
Treatment Minimum* Maximum*
Annealing 800 1200
Hot treatment 1200 1600

Common fabrication processes

Forging, screw machining

Common fabrication processes provided by CDA

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