Copper Alloy CC495K
EN CC495K · UNS C93700 · GB ZCuPb10Sn10
CC495K (CuSn10Pb10-C, C93700, ZCuPb10Sn10) is a high-leaded tin bronze with nominally 10 % tin and 10 % lead, combining a tin-strengthened matrix with a large free lead phase for boundary-lubricated sliding.
Reference datasheet — CC495K 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 GC condition
CC495K tempers and conditions
CC495K is supplied in 4 conditions, soft to hard. GC 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 |
|---|---|---|---|---|---|---|
Sand cast | Pick for large, complex or one-off bearing housings and pump bodies where dimensional tolerance and top strength are secondary. | 100 | 220 | 12 | 65 HB | 10 % IACS |
Permanent (chill) mould cast | Pick for medium-volume bushings needing tighter tolerances and a finer, denser structure than sand casting. | 125 | 250 | 8 | 70 HB | 10 % IACS |
Centrifugally cast | Pick for large-diameter bushings, sleeves and bearing rings where a dense, porosity-free wall is required. | 130 | 260 | 10 | 72 HB | 10 % IACS |
GCDefault Continuously cast bar / tube | Default stock form: continuous-cast round bar and tube for machined bushings, thrust washers and wear strips. | 140 | 270 | 10 | 75 HB | 10 % IACS |
What is CC495K?
CC495K (CuSn10Pb10-C, C93700, ZCuPb10Sn10) is a high-leaded tin bronze with nominally 10 % tin and 10 % lead, combining a tin-strengthened matrix with a large free lead phase for boundary-lubricated sliding. It is a standard bearing casting alloy at 140 MPa yield, 270 MPa tensile, 10 % elongation and 75 HB, with a machinability rating of 85, available as sand (GS), chill (GM), centrifugal (GZ) and continuous (GC) castings. The lead content rules out fusion welding and lead-restricted potable-water service; CC493K (C93200) is the usual alternative when higher ductility is needed. CC495K has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 762°C (1,404 °F). CC495K has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 76 GPa (11 Msi).
What is CC495K used for?
- plain bearings
- bushings
- thrust washers
- gear shift components
- medium-duty bearing castings
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 — 60/100, worse than 92% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Limited ductility — 10%, worse than 76% of copper alloy grades
CC495K properties
Typical room-temperature values for CC495K-GC; bars are the position among copper alloy grades.
Physical3
CC495K has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 762°C (1,404 °F).
Mechanical14
CC495K has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 10% and the elastic modulus is 76 GPa (11 Msi).
Thermal6
CC495K 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 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
CC495K conducts electricity at 10 % IACS, worse than 74% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), worse than 81% of copper alloy grades.
Sustainability4
Producing a kilogram of CC495K takes about 55 MJ of energy and emits 3.6 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 70%.
Manufacturability7
CC495K'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. CC495K is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC495K
Is CC495K easy to machine?
Excellent free-machining behaviour (≈80 % of free-cutting brass): use sharp positive-rake tools, high speed, light feed and flood coolant; chips break short thanks to the lead phase.
Can CC495K be welded?
Effectively unweldable by fusion because of 10 % lead (hot cracking, lead fume); repair by soft soldering or mechanical means, and use fume extraction on any hot work.
Can CC495K be formed, bent or molded?
Cast-only alloy with excellent fluidity and feeding — sand, chill, centrifugal and continuous casting all standard; avoid cold forming, and control cooling to prevent lead segregation in thick sections.
CC495K 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 |
| Pbfree lead phase — bearing/lubricity constituent | 8 – 11 | 10 |
| ZnC93700 limits Zn to 0.8 max | ≤ 2 | 0.5 |
| Niincl. Co | ≤ 2 | |
| FeC93700 allows up to 0.7 | ≤ 0.25 | |
| Sb | ≤ 0.5 | |
| P | ≤ 0.1 | |
| S | ≤ 0.1 | |
| Mn | ≤ 0.2 | |
| Al | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| Cu | ≥ 78 (balance) |
What surface finishes work on CC495K?
Takes a fine turned or bored bearing surface directly; polishing is limited by lead smear, and tin/lead or electroless-nickel plating is possible with careful pre-cleaning (no anodizing).
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).
Equivalent designations
Standards and trade names that resolve to Copper Alloy CC495K in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- C93700
- EN / DIN / Werkstoff-Nr.
- CuSn10Pb10-C
- GB (China)
- ZCuPb10Sn10
- Also called
- 64
How much does CC495K cost?
CC495K 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.
CC495K — frequently asked
What is CC495K used for?
CC495K is typically used for plain bearings, bushings, thrust washers, gear shift components and medium-duty bearing castings. In short: classic 10-10 bearing bronze; good load with self-lubrication; machines near free-cutting brass.
What is the yield strength of CC495K?
CC495K has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 74% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC495K easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Excellent free-machining behaviour (≈80 % of free-cutting brass): use sharp positive-rake tools, high speed, light feed and flood coolant; chips break short thanks to the lead phase.
Can CC495K be welded?
Not readily — weldability is rated not recommended (10/100). Effectively unweldable by fusion because of 10 % lead (hot cracking, lead fume); repair by soft soldering or mechanical means, and use fume extraction on any hot work.
What surface finishes work on CC495K?
Takes a fine turned or bored bearing surface directly; polishing is limited by lead smear, and tin/lead or electroless-nickel plating is possible with careful pre-cleaning (no anodizing).
Can CC495K be formed, bent or molded?
Cast-only alloy with excellent fluidity and feeding — sand, chill, centrifugal and continuous casting all standard; avoid cold forming, and control cooling to prevent lead segregation in thick sections.
What is the maximum service temperature of CC495K?
CC495K 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 CC495K-GC and CC495K-GS?
GC is the default condition — default stock form: continuous-cast round bar and tube for machined bushings, thrust washers and wear strips. GS: pick for large, complex or one-off bearing housings and pump bodies where dimensional tolerance and top strength are secondary. Yield strength is 140 MPa in GC versus 100 MPa in GS.
How much does CC495K cost?
CC495K 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
- EN 1982 — Copper and copper alloys: ingots and castings (CuSn10Pb10-C, CC495K) — CEN (2017)
- ASTM B505/B505M — Continuous cast copper alloys (C93700) — ASTM (2018)
- ASTM B584 — Copper alloy sand castings for general applications — ASTM (2022)
- GB/T 1176 — (ZCuPb10Sn10) — SAC (2013)
- CDA alloy datasheet C93700 (high-leaded tin bronze, SAE 64) — 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.