Copper Alloy C93600
UNS C93600 · ASTM B584 C93600
C93600 is a high-leaded tin bronze bearing alloy (about 80Cu-7Sn-12Pb) in which free lead particles dispersed through the copper-tin matrix act as a solid lubricant and embed abrasive debris.
Values for the As Cast condition
C93600 tempers and conditions
C93600 is supplied in 5 conditions, soft to hard. As Cast is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
as-cast sand mould | Pick for one-off or large/complex bearing housings and thick bushings where dimensional tolerance is loose. | 97 | 193 | 15 | 55 HB | 11 % IACS |
As CastDefault as-cast (no heat treatment) | Default supply condition for all C93600 castings and cast bar; no heat treatment is used for this alloy. | 110 | 207 | 15 | 60 HB | 11 % IACS |
as-cast metal mould | For repeat-production small bushings and glands where better surface and tolerance than sand casting are wanted. | 115 | 210 | 13 | 62 HB | 11 % IACS |
as-cast centrifugal | Choose for large-diameter sleeves and bearing liners needing sound, dense wall sections free of centre porosity. | 117 | 214 | 13 | 63 HB | 11 % IACS |
continuously cast bar/tube | Most-stocked form for machined bushings and thrust washers: finer structure, denser and slightly stronger than sand cast. | 124 | 221 | 12 | 65 HB | 11.5 % IACS |
What is C93600?
C93600 is a high-leaded tin bronze bearing alloy (about 80Cu-7Sn-12Pb) in which free lead particles dispersed through the copper-tin matrix act as a solid lubricant and embed abrasive debris. It is cast to ASTM B584 in sand, permanent-mould, centrifugal and continuous forms for sleeve bearings, bushings and pump liners under moderate load and boundary or marginal lubrication, where it machines easily, runs in quickly and resists seizure. Strength and hardness are low (110 MPa yield, 207 MPa tensile, 60 HB), it is effectively unweldable, and it is unsuited to high impact or elevated temperature; lead content is also restricted under potable-water and some environmental rules. C93200 is the nearest lower-lead bearing bronze. C93600 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 762°C (1,404 °F). C93600 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 207 MPa (30 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 76 GPa (11 Msi).
What is C93600 used for?
- Bearings
- Bushings
- Piston pin bushings
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
Limitations
- Low stiffness — 76 GPa (11 Msi), worse than 98% of copper alloy grades
- Difficult to weld — 10/100, worse than 98% of copper alloy grades
- Hard to polish — 55/100, worse than 97% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Low strength — 110 MPa (16 ksi), worse than 82% of copper alloy grades
C93600 properties
Typical room-temperature values for C93600-As Cast; bars are the position among copper alloy grades.
Physical3
C93600 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 762°C (1,404 °F).
Mechanical13
C93600 has a yield strength of 110 MPa (16 ksi) and a tensile strength of 207 MPa (30 ksi) — weaker than 82% of copper alloy grades. Elongation at break is 15% and the elastic modulus is 76 GPa (11 Msi).
Thermal6
C93600 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 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
C93600 conducts electricity at 11 % IACS, worse than 68% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 86% of copper alloy grades.
Sustainability4
Producing a kilogram of C93600 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%.
Manufacturability8
C93600's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability not recommended (10/100); 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. C93600 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C93600
Is C93600 easy to machine?
Excellent free-machining behaviour (≈80% of AISI 1212): use sharp positive-rake tools, light feeds and generous coolant; lead smearing can dull surface finish on final bores.
Can C93600 be welded?
Essentially unweldable — lead causes severe hot cracking and porosity; join by mechanical fit, soft soldering or shrink/press fitting instead.
Can C93600 be formed, bent or molded?
Casting alloy only (sand, permanent-mould, centrifugal, continuous); pour ~1090–1150 °C with good degassing and chills to avoid lead segregation and gravity settling in thick walls.
Manufacturability
The process limits FabDigit applies to C93600. Every C93600 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better85 / 100 |
|---|---|
| ISO material group | N.5 |
| Cutting speed (rough / finish) | 180 / 220 m/min |
| Minimum wall | 0.8 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 6× diameter |
| Best surface (machined / polished) | Ra 1.6 / — |
| Hardenable after machining | No |
C93600 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 |
|---|---|---|
| Cu | 79 – 83 | 81 |
| Sn | 6 – 8 | 7 |
| Pbfree lead phase for lubricity | 11 – 13 | 12 |
| Zn | ≤ 1 | |
| Niincl. Co | ≤ 1 | |
| Sb | ≤ 0.55 | |
| Fe | ≤ 0.2 | |
| P | ≤ 0.15 | |
| S | ≤ 0.08 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 |
What surface finishes work on C93600?
Not anodizable; leave as-machined, or tin/nickel plate, chemically blacken, or lap/burnish bearing bores — avoid abrasive polishing that smears the lead phase.
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).
Passivation
Plating
Organic Coating
Equivalent designations
Standards and trade names that resolve to Copper Alloy C93600 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B584 C93600
- Also called
- Leaded Bearing Bronze
How much does C93600 cost?
C93600 is a specialty-cost copper alloy ($$$$$), pricier than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C93600 — frequently asked
What is C93600 used for?
C93600 is typically used for bearings, bushings and piston pin bushings. In short: self-lubricating high-lead.
What is the yield strength of C93600?
C93600 has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 207 MPa (30 ksi) — weaker than 82% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C93600 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Excellent free-machining behaviour (≈80% of AISI 1212): use sharp positive-rake tools, light feeds and generous coolant; lead smearing can dull surface finish on final bores.
Can C93600 be welded?
Not readily — weldability is rated not recommended (10/100). Essentially unweldable — lead causes severe hot cracking and porosity; join by mechanical fit, soft soldering or shrink/press fitting instead.
What surface finishes work on C93600?
Not anodizable; leave as-machined, or tin/nickel plate, chemically blacken, or lap/burnish bearing bores — avoid abrasive polishing that smears the lead phase.
Can C93600 be formed, bent or molded?
Casting alloy only (sand, permanent-mould, centrifugal, continuous); pour ~1090–1150 °C with good degassing and chills to avoid lead segregation and gravity settling in thick walls.
What is the maximum service temperature of C93600?
C93600 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C93600 cost?
C93600 is a specialty-cost copper alloy ($$$$$), pricier than about 58% 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.
Can FabDigit make parts in C93600?
Yes — C93600 is available for CNC machining; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B22 — Bronze Castings for Bridges and Turntables — ASTM International (2017)
- CDA Standard Designation C93600 alloy datasheet (copper.org) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- GB/T 1176 (ZCuPb10Sn10 ) — SAC (2013)
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.