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C67600

Stocked alloy specs

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Reference guide

Stocked size schedules

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Extruded and drawn

C67600 manganese bronze is a versatile extruded and drawn alloy known for its high strength and good corrosion resistance. In addition, C676 has a fairly low melting temperature and a moderately low heat capacity.

C67600 spec sheet

Standard products

C67600

Product description: Manganese bronze
Tempers: H02 half hard, H04 hard
Solids: 3/4" to 2" O.D.
Hex: Consult mill
Standard lengths: 144"

Typical uses

Industrial: Gate valve stems, valve balls, welding rod

Similar or equivalent specification

CDA	ASTM	SAE	AMS	Federal	Military	Other
C67600	B138 B138M			QQ-B-728

Chemical composition

Cu%1	Pb%	Sn%	Zn%	Fe%	Mn%
Chemical composition according to ASTM B138/B138M-11(2017) 1Cu value includes Ag. Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
57.00- 60.00	0.50- 1.00	0.50- 1.50	Rem.	0.40- 1.30	0.05- 0.50

Machinability

Copper alloy UNS No.	Machinability rating	Density (lb/in3 at 68 °F)
C67600	60	0.302

Mechanical properties

Mechanical Composition according to ASTM B138/B138M-11(2017)

C67600

H02 half 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 HRB
72	496	36	248	13	90

Size range: over 1" to 2 1/2" 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 HRB
70	483	35	241	15	90

Size range: over 2 1/2"

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 HRB
65	448	32	221	17	90

C67600

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 HRB
80	552	56	386	8

Size range: over 1" to 2 1/2" 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 HRB
76	524	52	359	10

Size range: over 2 1/2"

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 HRB
68	469	45	310	16

Physical properties

	US Customary	Metric
Physical properties provided by CDA
Melting point - liquidus	1630 °F	888 °C
Melting point - solidus	1590 °F	866 °C
Density	0.302 lb/in3 at 68 °F	8.36 gm/cm3 at 20 °C
Electrical conductivity	24% IACS at 68 °F	0.14 MegaSiemens/cm at 20 °C
Thermal conductivity	61 Btu/sq ft/ft hr/°F at 68 °F	105.65 W/m at 20 °C
Coefficient of thermal expansion 68-572	11.8 · 10-6 per °F (68-572 °F)	20.4 · 10-6 per °C (20-300 °C)
Modulus of elasticity in tension	15000 ksi	103422 MPa
Modulus of rigidity	5600 ksi	38611 MPa

Fabrication properties

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

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