Copper Alloy C67600
UNS C67600
C67600 is a leaded manganese bronze (HMn58-2-1), a high-tensile manganese-bearing brass in the C50000–C69999 wrought bronze family with lead added for chip breaking.
Reference datasheet — C67600 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the H02 condition
C67600 tempers and conditions
C67600 is supplied in 8 conditions, soft to hard. H02 is the default FabDigit quotes; the values on this page are for it.
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 |
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?
C67600 is a leaded manganese bronze (HMn58-2-1), a high-tensile manganese-bearing brass in the C50000–C69999 wrought bronze family with lead added for chip breaking. It gives 565 MPa tensile, 310 MPa yield, 20% elongation and 150 HB with a machinability score of 60 — high for a duplex high-strength brass — and is normally supplied as hot-extruded or forged bar, hubs and blanks. Limits are a 180 °C maximum service temperature, formability of only 35, 24% IACS conductivity, and no fusion weldability because of the lead. An unleaded manganese bronze is the alternative when welding is required. C67600 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). C67600 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 565 MPa (81.9 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
What is C67600 used for?
- ship propeller hubs
- valve stems
- gears and bushings
- marine hardware requiring machining
Limitations
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C67600 properties
Typical room-temperature values for C67600-H02; bars are the position among copper alloy grades.
Physical3
C67600 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 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 565 MPa (81.9 ksi) — stronger than 64% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C67600 is rated for continuous service to 180°C (356 °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 conducts electricity at 24 % IACS, better than 57% 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 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's machinability is good (60/100, better than 74% of copper alloy grades); weldability poor (25/100); formability fair (35/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the copper alloy family
Yield strength against density for every copper alloy grade FabDigit runs. C67600 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C67600
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.
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 |
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.
Surface treatments FabDigit runs on copper alloy parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Equivalent designations
Standards and trade names that resolve to Copper Alloy C67600 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- HMn58-2-1
How much does C67600 cost?
C67600 is a premium-cost copper alloy ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C67600 — frequently asked
What is C67600 used for?
C67600 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?
C67600 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 565 MPa (81.9 ksi) — stronger than 64% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C67600 easy to machine?
Reasonably — machinability is rated good (60/100, better than 74% 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 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?
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 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?
C67600 is rated for continuous use to about 180°C (356 °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.
How much does C67600 cost?
C67600 is a premium-cost copper alloy ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.