Copper Alloy C92800
UNS C92800
C92800 is a high-tin leaded bronze casting alloy in the C90000–C95999 family, where the hard tin-rich δ-phase carries load and the lead provides lubricity.
Reference datasheet — C92800 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 M01 condition
C92800 tempers and conditions
C92800 is supplied in 4 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard supply condition for bearings, bushings and gear blanks poured in sand moulds (ASTM B505/B22 shapes). | 179 | 276 | 1 | 85 HB | 11 % IACS |
As centrifugally cast | Chill-cast bushings and small wear parts; finer δ-phase distribution gives slightly higher strength and hardness than sand cast. | 195 | 295 | 1 | 95 HB | 11 % IACS |
As chill cast | Choose for large-diameter bushings, sleeves and worm-gear rims where dense, porosity-free walls are required. | 200 | 300 | 1 | 95 HB | 11 % IACS |
As continuous cast | Continuous-cast bar and tube stock (ASTM B505) for machined bushings — most uniform structure and best machining behaviour. | 205 | 310 | 1 | 95 HB | 11 % IACS |
What is C92800?
C92800 is a high-tin leaded bronze casting alloy in the C90000–C95999 family, where the hard tin-rich δ-phase carries load and the lead provides lubricity. Default-condition values are 179 MPa yield, 276 MPa tensile, 85 HB and 11 % IACS, with only 1 % elongation, so it is used for heavy-duty bearings, bushings and wear plates cast to near-net shape. The very low ductility means it must not be shock-loaded, bent or worked, and it is not weldable in practice. C92700 or C93400 are the alternatives where more ductility is needed. C92800 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 830°C (1,526 °F). C92800 has a yield strength of 179 MPa (26 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 1% and the elastic modulus is 103 GPa (14.9 Msi).
What is C92800 used for?
- heavy-duty bearings
- bushings
- wear plates
Advantages
- Easy to machine — 70/100, better than 78% of copper alloy grades
Limitations
- Limited ductility — 1%, worse than 99% of copper alloy grades
- Difficult to weld — 10/100, worse than 98% of copper alloy grades
- Limited formability — 5/100, worse than 98% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
C92800 properties
Typical room-temperature values for C92800-M01; bars are the position among copper alloy grades.
Physical3
C92800 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 830°C (1,526 °F).
Mechanical15
C92800 has a yield strength of 179 MPa (26 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 59% of copper alloy grades. Elongation at break is 1% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C92800 is rated for continuous service to 230°C (446 °F). It conducts heat at 47 W/m·K (27.2 BTU/hr·ft·°F), worse than 69% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C92800 conducts electricity at 11 % IACS, worse than 68% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C92800 takes about 62 MJ of energy and emits 4.5 kg of CO₂ — more than 76% of copper alloy grades. Typical recycled content is 50%.
Manufacturability8
C92800's machinability is very good (70/100, better than 78% of copper alloy grades); weldability not recommended (10/100); formability not recommended (5/100).
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. C92800 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C92800
Is C92800 easy to machine?
Machines freely with sharp carbide or HSS tooling at moderate speeds; lead chips break well but the hard δ-phase abrades edges — use rigid setups and light finishing feeds.
Can C92800 be welded?
Not weldable in practice (hot-short, lead-bearing); repair by soldering or brazing only, or replace the casting.
Can C92800 be formed, bent or molded?
Cast to shape only — no hot or cold working; provide generous risers and controlled cooling to avoid tin sweat and shrinkage porosity in heavy sections.
C92800 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 |
|---|---|---|
| CuCu + named elements ≥ 99.4% | 78 – 82 | 80 |
| Snforms hard δ-phase | 15 – 17 | 16 |
| Pbsolid lubricant / machinability | 4 – 6 | 5 |
| Niincluding Co | ≤ 0.8 | 0.3 |
| Zn | ≤ 0.25 | |
| Fe | ≤ 0.2 | |
| Sb | ≤ 0.25 | |
| P | ≤ 0.05 | |
| S | ≤ 0.05 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 |
What surface finishes work on C92800?
Normally supplied as-machined or honed; tin, nickel or chrome plating and light polishing are practical, anodizing is not applicable.
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).
How much does C92800 cost?
C92800 is a high-cost copper alloy ($$$$), pricier than about 78% 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.
C92800 — frequently asked
What is C92800 used for?
C92800 is typically used for heavy-duty bearings, bushings and wear plates. In short: highest-tin bearing bronze; high load capacity; very low ductility.
What is the yield strength of C92800?
C92800 has a typical yield strength of 179 MPa (26 ksi) and a tensile strength of 276 MPa (40 ksi) — weaker than 59% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C92800 easy to machine?
Yes — machinability is rated very good (70/100, better than 78% of copper alloy grades). Machines freely with sharp carbide or HSS tooling at moderate speeds; lead chips break well but the hard δ-phase abrades edges — use rigid setups and light finishing feeds.
Can C92800 be welded?
Not readily — weldability is rated not recommended (10/100). Not weldable in practice (hot-short, lead-bearing); repair by soldering or brazing only, or replace the casting.
What surface finishes work on C92800?
Normally supplied as-machined or honed; tin, nickel or chrome plating and light polishing are practical, anodizing is not applicable.
Can C92800 be formed, bent or molded?
Cast to shape only — no hot or cold working; provide generous risers and controlled cooling to avoid tin sweat and shrinkage porosity in heavy sections.
What is the maximum service temperature of C92800?
C92800 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 C92800-M01 and C92800-M07?
M01 is the default condition — standard supply condition for bearings, bushings and gear blanks poured in sand moulds (ASTM B505/B22 shapes). M07: continuous-cast bar and tube stock (ASTM B505) for machined bushings — most uniform structure and best machining behaviour. Yield strength is 179 MPa in M01 versus 205 MPa in M07.
How much does C92800 cost?
C92800 is a high-cost copper alloy ($$$$), pricier than about 78% 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 B505/B505M — Copper Alloy Continuous Castings — ASTM (2018)
- ASTM B22 — Bronze Castings for Bridges and Turntables — ASTM (2017)
- CDA Alloy Datasheet C92800 (high-leaded tin bronze) — Copper Development Association (2023)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
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.