Copper Alloy C67600-O60
Temper
UNS C67600
O60 = soft annealed
Pick for maximum ductility when the part will be further formed, bent or coined before final machining.
Values for the O60 condition
Other C67600 tempers and conditions
C67600 is listed in 8 conditions; see the grade overview at C67600.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As hot extruded | Economical large-section extruded bar/tube for parts that will be fully machined after delivery. | 200 | 470 | 30 | 110 HB | 25 % IACS |
O60This page Soft annealed | Pick for maximum ductility when the part will be further formed, bent or coined before final machining. | 205 | 450 | 33 | 105 HB | 25 % IACS |
As hot forged and air cooled | Standard condition for hot-forged marine fittings and gear blanks where forged grain flow rather than cold work provides the properties. | 205 | 480 | 30 | 115 HB | 25 % IACS |
As forged and quenched | Quench from forging heat retains more β phase for higher strength and hardness in heavy wear parts, at some cost in ductility. | 240 | 520 | 25 | 130 HB | 24 % IACS |
Quarter hard | Light cold draw for straightened rod that still needs moderate bending or upsetting. | 260 | 515 | 25 | 130 HB | 24 % IACS |
H02Default Half hard | The standard stocked rod condition: good balance of strength, straightness and machinability for shafts, valve stems and bushings. | 310 | 565 | 20 | 150 HB | 24 % IACS |
Full hard | Choose when maximum strength, hardness and wear resistance are needed and little further forming is required. | 415 | 620 | 14 | 175 HB | 24 % IACS |
Extra hard | Small-diameter drawn rod/wire where the highest hardness and springiness are wanted; very limited ductility. | 470 | 680 | 9 | 190 HB | 23 % IACS |
What is C67600-O60?
C67600-O60 is C67600 in the O60 temper — pick for maximum ductility when the part will be further formed, bent or coined before final machining. C67600-O60 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 53% of copper alloy grades. Elongation at break is 33% and the elastic modulus is 103 GPa (14.9 Msi). C67600-O60 has a density of 8.36 g/cm³ (0.302 lb/in³), lighter than 76% of copper alloy grades. It melts at 855°C (1,571 °F). H02 is the default condition FabDigit quotes; O60 is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 33%, better than 78% of copper alloy grades
Limitations
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C67600-O60 properties
Typical room-temperature values for C67600-O60; 15 are specific to this condition. Other listed values are C67600 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C67600-O60 has a density of 8.36 g/cm³ (0.302 lb/in³), lighter than 76% of copper alloy grades. It melts at 855°C (1,571 °F).
Mechanical15
C67600-O60 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 53% of copper alloy grades. Elongation at break is 33% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C67600-O60 is rated for continuous service to 200°C (392 °F). It conducts heat at 100 W/m·K (57.8 BTU/hr·ft·°F), better than 54% of copper alloy grades. Thermal expansion is 21.2 µm/m·K (11.8 µin/in·°F).
Electrical3
C67600-O60 conducts electricity at 25 % IACS, better than 59% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C67600-O60 takes about 57 MJ of energy and emits 3.7 kg of CO₂ — less than 52% of copper alloy grades. Typical recycled content is 55%.
Manufacturability8
C67600-O60's machinability is fair (52/100, better than 69% of copper alloy grades); weldability poor (25/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C67600-O60
Is C67600 easy to machine?
Free-machining for a high-strength brass thanks to the lead: use sharp carbide, 0° to slightly positive rake, high speed and light feed; chips break well but the β phase is abrasive, so expect more tool wear than C36000.
Can C67600 be welded?
Fusion welding is not recommended (lead cracking, zinc fume); join by silver brazing, soft soldering or mechanical fastening with adequate ventilation.
Can C67600 be formed, bent or molded?
Excellent hot workability at 650–760 °C (hot forging/extrusion is the preferred route); cold formability is limited — anneal at ~500–600 °C between severe operations.
What surface finishes work on C67600?
Takes a bright mechanical polish; anodizing is not applicable — protect with benzotriazole passivation, lacquer, tin or nickel plating, and avoid ammonia-based cleaners to prevent SCC.
C67600 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cu | 57 – 60 | 58.5 |
| Sn | 0.5 – 1.5 | 1 |
| Fe | 0.4 – 1.3 | 0.8 |
| MnChinese HMn58-2 practice runs Mn 1.0–2.0 % | 0.05 – 0.5 | 0.3 |
| Pbadded for machinability | 0.3 – 1 | 0.6 |
| Al | ≤ 0.25 | 0.1 |
| Znremainder, approx. 37–40 % | balance | — |
C67600-O60 — frequently asked
What is C67600-O60 used for?
C67600-O60 is typically used for ship propeller hubs, valve stems, gears and bushings and marine hardware requiring machining. In short: machinable high-strength bronze; forged marine load hardware; not fusion weldable.
What is the yield strength of C67600-O60?
C67600-O60 has a typical yield strength of 205 MPa (29.7 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 53% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C67600-O60 easy to machine?
Reasonably — machinability is rated fair (52/100, better than 69% of copper alloy grades). Free-machining for a high-strength brass thanks to the lead: use sharp carbide, 0° to slightly positive rake, high speed and light feed; chips break well but the β phase is abrasive, so expect more tool wear than C36000.
Can C67600-O60 be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is not recommended (lead cracking, zinc fume); join by silver brazing, soft soldering or mechanical fastening with adequate ventilation.
What surface finishes work on C67600-O60?
Takes a bright mechanical polish; anodizing is not applicable — protect with benzotriazole passivation, lacquer, tin or nickel plating, and avoid ammonia-based cleaners to prevent SCC.
Can C67600-O60 be formed, bent or molded?
Excellent hot workability at 650–760 °C (hot forging/extrusion is the preferred route); cold formability is limited — anneal at ~500–600 °C between severe operations.
What is the maximum service temperature of C67600-O60?
C67600-O60 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C67600-H02 and C67600-H06?
H02 is the default condition — the standard stocked rod condition: good balance of strength, straightness and machinability for shafts, valve stems and bushings. H06: small-diameter drawn rod/wire where the highest hardness and springiness are wanted; very limited ductility. Yield strength is 310 MPa in H02 versus 470 MPa in H06.
Sources
- ASTM B138/B138M — Manganese Bronze Rod, Bar and Shapes — ASTM International (2019)
- CDA / UNS Standard Designations for Wrought Copper Alloys (C676xx manganese bronze) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- GB/T 4423 / GB/T 5232 (HMn58-2 ) (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.