Copper Alloy C92700
UNS C92700
C92700 is a leaded tin bronze casting alloy (C90000–C95999) with free lead dispersed through the matrix to give self-lubricating, anti-friction behaviour.
Reference datasheet — C92700 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 F-SAND condition
C92700 tempers and conditions
C92700 is supplied in 2 conditions, soft to hard. F-SAND is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
F-SANDDefault F | Standard as-cast sand-mould condition for bushings, bearing shells and worm gear blanks per ASTM B584. | 138 | 290 | 10 | 77 HB | 11 % IACS |
Centrifugally cast | Use for large-diameter rings, sleeves and gear rims where a dense, inclusion-free wall is required. | 145 | 296 | 11 | 80 HB | 11 % IACS |
Supply forms, finishes and certifications
Ways C92700 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
CC | Continuous cast bar / tube | Surface finish |
What is C92700?
C92700 is a leaded tin bronze casting alloy (C90000–C95999) with free lead dispersed through the matrix to give self-lubricating, anti-friction behaviour. Typical values are 138 MPa yield, 290 MPa tensile, 10 % elongation and 77 HB, with service to 250 °C, making it a standard choice for bearings, bushings and sleeves cast in sand, permanent, centrifugal or continuous moulds. Arc welding is not practical because the lead causes hot cracking and porosity, and elongation is lower than C92600. For higher load capacity in bearing service, consider C92800 or C92900. C92700 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). C92700 has a yield strength of 138 MPa (20 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 76% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 103 GPa (14.9 Msi).
What is C92700 used for?
- bearings
- bushings
- sleeves
Advantages
- Easy to machine — 80/100, better than 86% of copper alloy grades
Limitations
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Difficult to weld — 20/100, worse than 88% of copper alloy grades
- Hard to polish — 65/100, worse than 87% of copper alloy grades
- High embodied carbon — 4.6 kg CO₂/kg, worse than 82% of copper alloy grades
- Low strength — 138 MPa (20 ksi), worse than 76% of copper alloy grades
C92700 properties
Typical room-temperature values for C92700-F-SAND; bars are the position among copper alloy grades.
Physical3
C92700 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).
Mechanical13
C92700 has a yield strength of 138 MPa (20 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 76% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C92700 is rated for continuous service to 250°C (482 °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
C92700 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 C92700 takes about 71 MJ of energy and emits 4.6 kg of CO₂ — more than 85% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
C92700's machinability is very good (80/100, better than 86% of copper alloy grades); weldability poor (20/100); formability not recommended (10/100).
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. C92700 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C92700
Is C92700 easy to machine?
Free-machining thanks to the lead phase (~80% rating); use sharp positive-rake tools, high speed, light feed and generous coolant to avoid smearing the soft matrix.
Can C92700 be welded?
Arc welding is not recommended — lead causes hot cracking and porosity; join by soldering (excellent), brazing (fair) or mechanical fits, and repair defects by braze or metal-spray rather than fusion.
Can C92700 be formed, bent or molded?
Casting alloy only: pour 1100–1180 °C into sand, permanent, centrifugal or continuous moulds, feed heavily and cool directionally to limit tin/lead segregation and microshrinkage.
C92700 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 | 9 – 11 | 10 |
| Pb | 1 – 2.5 | 2 |
| Zn | ≤ 0.7 | |
| NiNi + Co | ≤ 1 | |
| Fe | ≤ 0.2 | |
| Sb | ≤ 0.25 | |
| P | ≤ 0.3 | |
| S | ≤ 0.05 | |
| Si | ≤ 0.01 | |
| Al | ≤ 0.01 | |
| Cu | ≥ 86 (balance) |
What surface finishes work on C92700?
Not anodizable; machine-finish or hone bearing bores to 0.4–0.8 µm Ra, and use tin, nickel or chromate/lacquer coatings where tarnishing or lead leaching must be avoided.
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 C92700 cost?
C92700 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.
C92700 — frequently asked
What is C92700 used for?
C92700 is typically used for bearings, bushings and sleeves. In short: self-lubricating bearing bronze; free-machining leaded casting; excellent solderability.
What is the yield strength of C92700?
C92700 has a typical yield strength of 138 MPa (20 ksi) and a tensile strength of 290 MPa (42.1 ksi) — weaker than 76% of copper alloy grades. Strength varies by condition: see the 2 listed tempers.
Is C92700 easy to machine?
Yes — machinability is rated very good (80/100, better than 86% of copper alloy grades). Free-machining thanks to the lead phase (~80% rating); use sharp positive-rake tools, high speed, light feed and generous coolant to avoid smearing the soft matrix.
Can C92700 be welded?
Not readily — weldability is rated poor (20/100). Arc welding is not recommended — lead causes hot cracking and porosity; join by soldering (excellent), brazing (fair) or mechanical fits, and repair defects by braze or metal-spray rather than fusion.
What surface finishes work on C92700?
Not anodizable; machine-finish or hone bearing bores to 0.4–0.8 µm Ra, and use tin, nickel or chromate/lacquer coatings where tarnishing or lead leaching must be avoided.
Can C92700 be formed, bent or molded?
Casting alloy only: pour 1100–1180 °C into sand, permanent, centrifugal or continuous moulds, feed heavily and cool directionally to limit tin/lead segregation and microshrinkage.
What is the maximum service temperature of C92700?
C92700 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C92700 F-SAND and C92700 CENT?
F-SAND is the default condition — standard as-cast sand-mould condition for bushings, bearing shells and worm gear blanks per ASTM B584. CENT: use for large-diameter rings, sleeves and gear rims where a dense, inclusion-free wall is required. Yield strength is 138 MPa in F-SAND versus 145 MPa in CENT.
How much does C92700 cost?
C92700 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 B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B271 — Copper-Base Alloy Centrifugal Castings — ASTM International (2020)
- Copper Alloy C92700 alloy datasheet (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 18 — Friction, Lubrication and Wear Technology — ASM International (1992)
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.