Copper Alloy C93500-M02
Heat-treated state
UNS C93500
M02 = as centrifugally cast
Used for large-diameter sleeves, thrust washers and wear rings needing sound, segregation-free walls.
Values for the M02 condition
Other C93500 tempers and conditions
C93500 is listed in 3 conditions; see the grade overview at C93500.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As sand cast | Choose for shaped castings, housings and large or one-off bearing bodies where a pattern is used. | 110 | 221 | 20 | 60 HB | 15 % IACS |
M02This page As centrifugally cast | Used for large-diameter sleeves, thrust washers and wear rings needing sound, segregation-free walls. | 131 | 234 | 20 | 63 HB | 15 % IACS |
M07Default As continuous cast | Standard stock form for bushings and bearing sleeves: dense, low-porosity continuous-cast bar and hollow bar. | 138 | 241 | 20 | 65 HB | 15 % IACS |
What is C93500-M02?
C93500-M02 is C93500 heat treated to M02 — used for large-diameter sleeves, thrust washers and wear rings needing sound, segregation-free walls. C93500-M02 has a yield strength of 131 MPa (19 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 97 GPa (14.1 Msi). C93500-M02 has a density of 8.92 g/cm³ (0.322 lb/in³), heavier than 81% of copper alloy grades. It melts at 762°C (1,404 °F). M07 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
Limitations
- Hard to polish — 55/100, worse than 97% of copper alloy grades
- Difficult to weld — 15/100, worse than 94% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Low stiffness — 97 GPa (14.1 Msi), worse than 88% of copper alloy grades
- Low strength — 131 MPa (19 ksi), worse than 77% of copper alloy grades
C93500-M02 properties
Typical room-temperature values for C93500-M02; 21 are specific to this condition. Other listed values are C93500 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C93500-M02 has a density of 8.92 g/cm³ (0.322 lb/in³), heavier than 81% of copper alloy grades. It melts at 762°C (1,404 °F).
Mechanical15
C93500-M02 has a yield strength of 131 MPa (19 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 97 GPa (14.1 Msi).
Thermal6
C93500-M02 is rated for continuous service to 200°C (392 °F). It conducts heat at 71 W/m·K (41 BTU/hr·ft·°F), worse than 54% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
C93500-M02 conducts electricity at 15 % IACS, worse than 54% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C93500-M02 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 75%.
Manufacturability7
C93500-M02's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability poor (15/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C93500-M02
Is C93500 easy to machine?
Free-machining thanks to the lead phase — short chips, high speeds, use positive-rake tooling and light feeds; bore-and-hone bushings for final ID.
Can C93500 be welded?
Essentially unweldable by fusion due to ~9 % lead (hot cracking, porosity); joins are made by soldering or, with care, silver brazing.
Can C93500 be formed, bent or molded?
Casting alloy only — sand, centrifugal or continuous cast; not cold-workable, but bushings can be lightly press-fit sized after machining.
What surface finishes work on C93500?
Machined/honed finishes are typical; can be tin- or nickel-plated for appearance or corrosion; polishes to a moderate lustre but lead smears.
C93500 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 |
|---|---|---|
| Cuincludes Ag | 83 – 86 | 85 |
| Sn | 4.3 – 6 | 5 |
| Pb | 8 – 10 | 9 |
| Zn | ≤ 2 | 0.5 |
| Niincl. Co | ≤ 1 | — |
| Fe | ≤ 0.15 | — |
| Sb | ≤ 0.55 | — |
| S | ≤ 0.08 | — |
| P0.30 max for continuous cast (B505) | ≤ 0.05 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
C93500-M02 — frequently asked
What is C93500-M02 used for?
C93500-M02 is typically used for bushings, bearings and general castings. In short: free-machining bearing bronze; good conformability, medium loads; not fusion weldable.
What is the yield strength of C93500-M02?
C93500-M02 has a typical yield strength of 131 MPa (19 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C93500-M02 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Free-machining thanks to the lead phase — short chips, high speeds, use positive-rake tooling and light feeds; bore-and-hone bushings for final ID.
Can C93500-M02 be welded?
Not readily — weldability is rated poor (15/100). Essentially unweldable by fusion due to ~9 % lead (hot cracking, porosity); joins are made by soldering or, with care, silver brazing.
What surface finishes work on C93500-M02?
Machined/honed finishes are typical; can be tin- or nickel-plated for appearance or corrosion; polishes to a moderate lustre but lead smears.
Can C93500-M02 be formed, bent or molded?
Casting alloy only — sand, centrifugal or continuous cast; not cold-workable, but bushings can be lightly press-fit sized after machining.
What is the maximum service temperature of C93500-M02?
C93500-M02 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 C93500-M07 and C93500-M01?
M07 is the default condition — standard stock form for bushings and bearing sleeves: dense, low-porosity continuous-cast bar and hollow bar. M01: choose for shaped castings, housings and large or one-off bearing bodies where a pattern is used. Yield strength is 138 MPa in M07 versus 110 MPa in M01.
Sources
- ASTM B505/B505M — Continuous Cast Copper Alloy Castings — ASTM (2018)
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM (2022)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM (2020)
- CDA/copper.org alloy datasheet C93500 — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
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.