Copper Alloy C67600-M30
Temper
UNS C67600
M30 = as hot extruded
Economical large-section extruded bar/tube for parts that will be fully machined after delivery.
Values for the M30 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 |
|---|---|---|---|---|---|---|
M30This page 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-M30?
C67600-M30 is C67600 in the M30 temper — economical large-section extruded bar/tube for parts that will be fully machined after delivery. C67600-M30 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 54% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 103 GPa (14.9 Msi). C67600-M30 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; M30 is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Difficult to weld — 25/100, worse than 78% of copper alloy grades
C67600-M30 properties
Typical room-temperature values for C67600-M30; 21 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-M30 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-M30 has a yield strength of 200 MPa (29 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 54% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C67600-M30 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-M30 conducts electricity at 25 % IACS, better than 59% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (57/100), worse than 80% of copper alloy grades.
Sustainability4
Producing a kilogram of C67600-M30 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-M30's machinability is good (55/100, better than 71% of copper alloy grades); weldability poor (25/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C67600-M30
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-M30 — frequently asked
What is C67600-M30 used for?
C67600-M30 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-M30?
C67600-M30 has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 54% of copper alloy grades. Strength varies by condition: see the 8 listed tempers.
Is C67600-M30 easy to machine?
Reasonably — machinability is rated good (55/100, better than 71% 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-M30 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-M30?
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-M30 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-M30?
C67600-M30 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.