C69430

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

CDA	ASTM	SAE	AMS	Federal	Military	Other
C69430	B371 B371M

Cu%1	Pb%	Zn%	Fe%	Si%	As%
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	0.03- 0.06

Copper alloy UNS No.	Machinability rating	Density (lb/in3 at 68 °F)
C69430	30	0.260

Mechanical properties according to ASTM B371/B371M-19

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 HRB
80	550	40	276	15	95

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 HRB
75	515	35	241	15	95

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 HRB
65	450	35	241	15	95

	US Customary	Metric
Physical properties provided by CDA
Melting point - liquidus	1685 °F	918 °C
Melting point - solidus	1510 °F	821 °C
Density	0.26 lb/in3 at 68 °F	7.19 gm/cm3 at 20 °C
Specific gravity	7.19	7.19
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

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

Forging, screw machining

Common fabrication processes provided by CDA