Copper Alloy C94800-M05
Finish state
UNS C94800
M05 = as plaster cast
Use for repeat small parts where finer chill structure gives modestly higher strength and better surface.
Values for the M05 condition
Other C94800 tempers and conditions
C94800 is listed in 5 conditions; see the grade overview at C94800.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand-mould condition for general bearings, valve bodies and worm gears. | 155 | 310 | 35 | 80 HB | 11 % IACS |
M05This page As plaster cast | Use for repeat small parts where finer chill structure gives modestly higher strength and better surface. | 165 | 325 | 30 | 85 HB | 11 % IACS |
As centrifugally cast | Pick for sleeves, bushings and rings needing dense, low-porosity walls and slightly higher strength than sand cast. | 170 | 330 | 30 | 85 HB | 11 % IACS |
As continuous cast | Best choice for stock bar/tube to be machined into bushings; sound, uniform structure with good machining response. | 175 | 330 | 28 | 90 HB | 11 % IACS |
Solution heat treated and precipitation hardened | Choose when maximum strength, hardness and wear life are needed from a Ni-Sn bronze; ductility drops sharply. | 275 | 415 | 10 | 140 HB | 13 % IACS |
What is C94800-M05?
C94800-M05 is C94800 supplied in the M05 condition — use for repeat small parts where finer chill structure gives modestly higher strength and better surface. C94800-M05 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 325 MPa (47.1 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 110 GPa (16 Msi). C94800-M05 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 900°C (1,652 °F). M01 is the default condition FabDigit quotes; M05 is available on request or by drawing note.
Advantages
- Easy to machine — 80/100, better than 86% of copper alloy grades
- Ductile — tolerates forming and impact — 30%, better than 75% of copper alloy grades
Limitations
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
C94800-M05 properties
Typical room-temperature values for C94800-M05; 21 are specific to this condition. Other listed values are C94800 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C94800-M05 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 900°C (1,652 °F).
Mechanical15
C94800-M05 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 325 MPa (47.1 ksi) — weaker than 64% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 110 GPa (16 Msi).
Thermal6
C94800-M05 is rated for continuous service to 230°C (446 °F). It conducts heat at 46 W/m·K (26.6 BTU/hr·ft·°F), worse than 73% of copper alloy grades. Thermal expansion is 17.5 µm/m·K (9.72 µin/in·°F).
Electrical3
C94800-M05 conducts electricity at 11 % IACS, worse than 68% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 58% of copper alloy grades.
Sustainability4
Producing a kilogram of C94800-M05 takes about 62 MJ of energy and emits 4.2 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 55%.
Manufacturability8
C94800-M05's machinability is very good (80/100, better than 86% of copper alloy grades); weldability poor (30/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C94800-M05
Is C94800 easy to machine?
Free-machining for a bronze (≈80% of AISI 1212) — sharp positive-rake carbide or HSS tools, light feeds and soluble-oil coolant give short chips and fine finishes.
Can C94800 be welded?
Fusion welding is poor because of the lead content (hot cracking, porosity); prefer brazing or soldering, or mechanical joining.
Can C94800 be formed, bent or molded?
Cast-only alloy: pours well in sand, permanent-mould, centrifugal and continuous casting; use good risering to fight the wide freezing range and shrinkage porosity.
What surface finishes work on C94800?
Machines and polishes to a bright bronze surface; can be tin- or nickel-plated for barrier protection or chemically patinated/lacquered for appearance.
C94800 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 |
|---|---|---|
| Sn | 4.5 – 6 | 5 |
| NiNi including Co | 4.5 – 6 | 5 |
| Zn | 1 – 2 | 1.5 |
| Pb | 0.3 – 1 | 0.6 |
| Fe | ≤ 0.25 | — |
| Sb | ≤ 0.15 | — |
| S | ≤ 0.05 | — |
| P0.10 max permitted for heat-treated castings | ≤ 0.05 | — |
| Al | ≤ 0.01 | — |
| Si | ≤ 0.01 | — |
| CuCu + named elements ≥ 99.3% | ≥ 84 (balance) | — |
C94800-M05 — frequently asked
What is C94800-M05 used for?
C94800-M05 is typically used for valve components, gears and pump parts. In short: machinable nickel-tin bronze; strength close to C94700; leaded, so weld-limited.
What is the yield strength of C94800-M05?
C94800-M05 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 325 MPa (47.1 ksi) — weaker than 64% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C94800-M05 easy to machine?
Yes — machinability is rated very good (80/100, better than 86% of copper alloy grades). Free-machining for a bronze (≈80% of AISI 1212) — sharp positive-rake carbide or HSS tools, light feeds and soluble-oil coolant give short chips and fine finishes.
Can C94800-M05 be welded?
Not readily — weldability is rated poor (30/100). Fusion welding is poor because of the lead content (hot cracking, porosity); prefer brazing or soldering, or mechanical joining.
What surface finishes work on C94800-M05?
Machines and polishes to a bright bronze surface; can be tin- or nickel-plated for barrier protection or chemically patinated/lacquered for appearance.
Can C94800-M05 be formed, bent or molded?
Cast-only alloy: pours well in sand, permanent-mould, centrifugal and continuous casting; use good risering to fight the wide freezing range and shrinkage porosity.
What is the maximum service temperature of C94800-M05?
C94800-M05 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C94800-M01 and C94800-TF00?
M01 is the default condition — standard as-cast sand-mould condition for general bearings, valve bodies and worm gears. TF00: choose when maximum strength, hardness and wear life are needed from a Ni-Sn bronze; ductility drops sharply. Yield strength is 155 MPa in M01 versus 275 MPa in TF00.
Sources
- ASTM B505/B505M — Continuous Cast Copper Alloy Bar — ASTM International (2022)
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- CDA Alloy Datasheet C94800 (Leaded Nickel-Tin Bronze) — 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.