Copper Alloy C95700-M02
Heat-treated state
UNS C95700
M02 = as centrifugally cast
Pick for rings, bushings and sleeves needing denser, more uniform structure than sand casting.
Values for the M02 condition
Other C95700 tempers and conditions
C95700 is listed in 3 conditions; see the grade overview at C95700.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand-cast condition for propellers, housings and large marine castings. | 330 | 655 | 26 | 180 HB | 3.1 % IACS |
M02This page As centrifugally cast | Pick for rings, bushings and sleeves needing denser, more uniform structure than sand casting. | 350 | 690 | 24 | 190 HB | 3.1 % IACS |
As continuous cast | Choose for stock bar and tube for machined bushings, wear plates and gear blanks. | 360 | 690 | 22 | 195 HB | 3.1 % IACS |
What is C95700-M02?
C95700-M02 is C95700 heat treated to M02 — pick for rings, bushings and sleeves needing denser, more uniform structure than sand casting. C95700-M02 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 24% and the elastic modulus is 110 GPa (16 Msi). C95700-M02 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 870°C (1,598 °F). M01 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
Advantages
- Lightweight — 7.53 g/cm³ (0.272 lb/in³), better than 96% of copper alloy grades
- Good corrosion resistance — 79/100, better than 96% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
- Readily welded — 65/100, better than 80% of copper alloy grades
Limitations
- Poor heat conductor — 20 W/m·K (11.6 BTU/hr·ft·°F), worse than 100% of copper alloy grades
- Low electrical conductivity — 3.1 % IACS, worse than 99% of copper alloy grades
C95700-M02 properties
Typical room-temperature values for C95700-M02; 21 are specific to this condition. Other listed values are C95700 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C95700-M02 has a density of 7.53 g/cm³ (0.272 lb/in³), lighter than 96% of copper alloy grades. It melts at 870°C (1,598 °F).
Mechanical14
C95700-M02 has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of copper alloy grades. Elongation at break is 24% and the elastic modulus is 110 GPa (16 Msi).
Thermal5
C95700-M02 is rated for continuous service to 300°C (572 °F). It conducts heat at 20 W/m·K (11.6 BTU/hr·ft·°F), worse than 100% of copper alloy grades. Thermal expansion is 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C95700-M02 conducts electricity at 3.1 % IACS, worse than 99% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (79/100), better than 96% of copper alloy grades.
Sustainability4
Producing a kilogram of C95700-M02 takes about 60 MJ of energy and emits 3.8 kg of CO₂ — more than 69% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
C95700-M02's machinability is fair (45/100, better than 64% of copper alloy grades); weldability good (65/100); formability poor (20/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C95700-M02
Is C95700 easy to machine?
Machines like a tough duplex bronze — rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; gummy chips and hard Fe-rich particles cause edge wear.
Can C95700 be welded?
GTAW/GMAW with matching aluminum-bronze filler (ERCuAl-A2/ERCuMnNiAl); remove alumina film, preheat heavy sections 150–200 °C and control interpass heat to avoid cracking.
Can C95700 be formed, bent or molded?
Casting alloy only — good fluidity but needs bottom/tangential gating and generous risering to prevent oxide entrapment and shrinkage; hot working possible around 800–900 °C, cold forming not practical.
What surface finishes work on C95700?
Not anodizable; finished by machining, grinding and polishing to a golden lustre, or shot-blasted and painted with epoxy primer for immersed service; nickel/chrome plating requires careful strike layer.
C95700 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 |
|---|---|---|
| Al | 7 – 8.5 | 7.8 |
| Mnprincipal strengthener of this grade | 11 – 14 | 12.5 |
| Fe | 2 – 4 | 3 |
| NiNi + Co | 1.5 – 3 | 2 |
| Si | ≤ 0.1 | — |
| Pb | ≤ 0.03 | — |
| CuCu + named elements = 99.5 % min per ASTM B148 | ≥ 71 (balance) | — |
C95700-M02 — frequently asked
What is C95700-M02 used for?
C95700-M02 is typically used for ship propellers, heavy gears and marine hardware. In short: tough propeller-grade bronze; 26% elongation as cast; high strength, low conductivity.
What is the yield strength of C95700-M02?
C95700-M02 has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 690 MPa (100 ksi) — stronger than 74% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C95700-M02 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines like a tough duplex bronze — rigid setups, positive-rake carbide, moderate speed with heavy feed and flood coolant; gummy chips and hard Fe-rich particles cause edge wear.
Can C95700-M02 be welded?
Yes — weldability is rated good (65/100). GTAW/GMAW with matching aluminum-bronze filler (ERCuAl-A2/ERCuMnNiAl); remove alumina film, preheat heavy sections 150–200 °C and control interpass heat to avoid cracking.
What surface finishes work on C95700-M02?
Not anodizable; finished by machining, grinding and polishing to a golden lustre, or shot-blasted and painted with epoxy primer for immersed service; nickel/chrome plating requires careful strike layer.
Can C95700-M02 be formed, bent or molded?
Casting alloy only — good fluidity but needs bottom/tangential gating and generous risering to prevent oxide entrapment and shrinkage; hot working possible around 800–900 °C, cold forming not practical.
What is the maximum service temperature of C95700-M02?
C95700-M02 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C95700-M01 and C95700-M07?
M01 is the default condition — standard as-cast sand-cast condition for propellers, housings and large marine castings. M07: choose for stock bar and tube for machined bushings, wear plates and gear blanks. Yield strength is 330 MPa in M01 versus 360 MPa in M07.
Sources
- ASTM B148 — Aluminum-Bronze Sand Castings — ASTM International (2019)
- Copper Alloy C95700 datasheet — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- GB/T 1176 (ZCuAl8Mn13Fe3Ni2) — SAC (2013)
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.