Copper Alloy C93200
UNS C93200 · AISI/SAE 660, 660 Bronze · ASTM B584 C93200
C93200, also known as SAE 660, is a cast leaded tin bronze with roughly 7 % Sn and 7 % Pb supplied to ASTM B584; the dispersed lead phase gives self-lubrication and free-cutting behaviour.
Values for the As Cast condition
C93200 tempers and conditions
C93200 is supplied in 4 conditions, soft to hard. As Cast 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 |
|---|---|---|---|---|---|---|
As CastDefault sand cast (ASTM B584), no heat treatment | Default stock condition for sand-cast bushings, bearing blanks and complex housings. | 125 | 240 | 20 | 65 HB | 12 % IACS |
metal-mold castings | Chosen for medium-volume small bushings/thrust washers needing better surface and dimensional repeatability than sand. | 130 | 250 | 18 | 67 HB | 12 % IACS |
spun cast sleeves and large bushings | Use for large-diameter sleeves where a dense, porosity-free wall and near-net bore are needed. | 135 | 255 | 18 | 68 HB | 12 % IACS |
ASTM B505 continuous-cast bar/tube | Pick for standard bushing stock: finer, denser structure gives slightly higher strength and hardness than sand cast. | 145 | 275 | 15 | 70 HB | 12 % IACS |
What is C93200?
C93200, also known as SAE 660, is a cast leaded tin bronze with roughly 7 % Sn and 7 % Pb supplied to ASTM B584; the dispersed lead phase gives self-lubrication and free-cutting behaviour. It is the default general-purpose bearing bronze, available as sand, continuous, permanent-mold and centrifugal castings and as continuous-cast bar for machining, with 125 MPa yield, 240 MPa tensile, 20 % elongation, 65 HB and 12 % IACS. It tolerates boundary lubrication and slight misalignment at lower material and machining cost than aluminium bronze. Limits: not weldable because of the lead, service capped near 230 °C and unsuited to heavy shock loads, and it cannot be used where lead-free legislation applies. C93200 has a density of 8.93 g/cm³ (0.323 lb/in³), heavier than 82% of copper alloy grades. It melts at 854°C (1,569 °F). C93200 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 240 MPa (34.8 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 100 GPa (14.5 Msi).
What is C93200 used for?
- Bearings
- Lathe bushings
- Pump fixtures
Advantages
- Easy to machine — 78/100, better than 82% of copper alloy grades
Limitations
- Difficult to weld — 15/100, worse than 94% of copper alloy grades
- Limited formability — 8/100, worse than 94% of copper alloy grades
- Hard to polish — 60/100, worse than 92% of copper alloy grades
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
- Low strength — 125 MPa (18.1 ksi), worse than 77% of copper alloy grades
C93200 properties
Typical room-temperature values for C93200-As Cast; bars are the position among copper alloy grades.
Physical3
C93200 has a density of 8.93 g/cm³ (0.323 lb/in³), heavier than 82% of copper alloy grades. It melts at 854°C (1,569 °F).
Mechanical14
C93200 has a yield strength of 125 MPa (18.1 ksi) and a tensile strength of 240 MPa (34.8 ksi) — weaker than 77% of copper alloy grades. Elongation at break is 20% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
C93200 is rated for continuous service to 230°C (446 °F). It conducts heat at 59 W/m·K (34.1 BTU/hr·ft·°F), worse than 61% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C93200 conducts electricity at 12 % IACS, worse than 62% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C93200 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 85%.
Manufacturability8
C93200's machinability is very good (78/100, better than 82% of copper alloy grades); weldability poor (15/100); formability not recommended (8/100).
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. C93200 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C93200
Is C93200 easy to machine?
Excellent free-cutting behaviour (~70 % of C36000); use sharp positive-rake tools, high speed, light feeds and flood coolant — lead gives short chips and fine bores.
Can C93200 be welded?
Not weldable — lead causes hot cracking and fumes; repair by mechanical means or replace, soft soldering is acceptable.
Can C93200 be formed, bent or molded?
Casting alloy only: good fluidity for sand, continuous, permanent-mold and centrifugal casting; no cold forming, hot working not practised.
Manufacturability
The process limits FabDigit's quote engine applies to C93200. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better78 / 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 |
C93200 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 |
|---|---|---|
| Cuper ASTM B584/B505 | 81 – 85 | 83 |
| Sn | 6.3 – 7.5 | 7 |
| Pbfree-machining / self-lubricating phase | 6 – 8 | 7 |
| Zn | 1 – 4 | 3 |
| NiNi incl. Co | ≤ 1 | |
| Fe | ≤ 0.2 | |
| Sb | ≤ 0.35 | |
| P | ≤ 0.15 | |
| S | ≤ 0.08 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 |
What surface finishes work on C93200?
Machine or burnish bores to size; tin, nickel or silver plating and light polishing work well, no anodizing; handle lead-bearing swarf per local regulations.
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 C93200 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- AISI / SAE
- 660660 Bronze
- ASTM
- B584 C93200
- Also called
- Bearing Bronze
- Similar grades
- ZCuPb10Sn10
How much does C93200 cost?
C93200 is a premium-cost copper alloy ($$$), pricier than about 58% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
C93200 — frequently asked
What is C93200 used for?
C93200 is typically used for bearings, lathe bushings and pump fixtures. In short: standard bearing bronze.
What is the yield strength of C93200?
C93200 has a typical yield strength of 125 MPa (18.1 ksi) and a tensile strength of 240 MPa (34.8 ksi) — weaker than 77% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is C93200 easy to machine?
Yes — machinability is rated very good (78/100, better than 82% of copper alloy grades). Excellent free-cutting behaviour (~70 % of C36000); use sharp positive-rake tools, high speed, light feeds and flood coolant — lead gives short chips and fine bores.
Can C93200 be welded?
Not readily — weldability is rated poor (15/100). Not weldable — lead causes hot cracking and fumes; repair by mechanical means or replace, soft soldering is acceptable.
What surface finishes work on C93200?
Machine or burnish bores to size; tin, nickel or silver plating and light polishing work well, no anodizing; handle lead-bearing swarf per local regulations.
Can C93200 be formed, bent or molded?
Casting alloy only: good fluidity for sand, continuous, permanent-mold and centrifugal casting; no cold forming, hot working not practised.
What is the maximum service temperature of C93200?
C93200 is rated for continuous use to about 230°C (446 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does C93200 cost?
C93200 is a premium-cost copper alloy ($$$), 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 C93200?
Yes — C93200 is available for CNC machining and casting & forging with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM (2018)
- SAE J462 — Cast Copper Alloys (SAE 660) — SAE International (2016)
- CDA Alloy Datasheet C93200 (High Leaded Tin Bronze) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
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.