Copper Alloy CC483K
EN CC483K
CC483K (CuSn12-C, G-CuSn12) is a lead-free 12 % tin cast bronze whose hard delta phase gives high hardness, strength and wear resistance.
Reference datasheet — CC483K 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
CC483K tempers and conditions
CC483K is supplied in 5 conditions, soft to hard. GC 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 |
|---|---|---|---|---|---|---|
Sand cast | Large or one-off bushings, worm wheels and housings where section size rules out chill or continuous casting. | 160 | 280 | 7 | 90 HB | 9 % IACS |
Investment / precision cast | Near-net-shape small parts with complex geometry where machining from bar would be wasteful. | 160 | 280 | 5 | 92 HB | 9 % IACS |
Permanent mould (chill) cast | Series production of small/medium bushings and gear blanks needing finer structure than sand casting. | 175 | 300 | 6 | 95 HB | 9 % IACS |
Centrifugally cast | Best choice for large-diameter bushings, worm-wheel rims and sleeves needing dense, porosity-free walls. | 180 | 310 | 8 | 98 HB | 9 % IACS |
GCDefault Continuously cast | Standard stocked form (solid and hollow bar) for machined bearings, nuts and slide plates; finest, most uniform structure. | 190 | 320 | 6 | 100 HB | 9 % IACS |
What is CC483K?
CC483K (CuSn12-C, G-CuSn12) is a lead-free 12 % tin cast bronze whose hard delta phase gives high hardness, strength and wear resistance. It is the usual choice for heavily loaded sliding and gear parts where lead must be avoided, cast as sand (GS), gravity die (GM), centrifugal (GZ), continuous (GC) or pressure die (GP) product at 190 MPa yield, 320 MPa tensile, 6 % elongation and 100 HB. The trade-offs are low elongation, unreliable fusion welding and a machinability score of only 45. CC482K adds lead for easier machining, while CC484K adds nickel for more toughness. CC483K has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 830°C (1,526 °F). CC483K has a yield strength of 190 MPa (27.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 57% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 100 GPa (14.5 Msi).
What is CC483K used for?
- worm gears
- bushings
- bearing bushes
- high-load slides
- gear wheels
Advantages
- Good corrosion resistance — 72/100, better than 84% of copper alloy grades
Limitations
- Limited ductility — 6%, worse than 89% of copper alloy grades
- Limited formability — 10/100, worse than 89% of copper alloy grades
- Low stiffness — 100 GPa (14.5 Msi), worse than 82% of copper alloy grades
- High embodied carbon — 4.5 kg CO₂/kg, worse than 79% of copper alloy grades
- Low electrical conductivity — 9 % IACS, worse than 78% of copper alloy grades
CC483K properties
Typical room-temperature values for CC483K-GC; bars are the position among copper alloy grades.
Physical3
CC483K has a density of 8.75 g/cm³ (0.316 lb/in³), lighter than 51% of copper alloy grades. It melts at 830°C (1,526 °F).
Mechanical15
CC483K has a yield strength of 190 MPa (27.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 57% of copper alloy grades. Elongation at break is 6% and the elastic modulus is 100 GPa (14.5 Msi).
Thermal6
CC483K is rated for continuous service to 250°C (482 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), worse than 67% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
CC483K conducts electricity at 9 % IACS, worse than 78% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 84% of copper alloy grades.
Sustainability4
Producing a kilogram of CC483K 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%.
Manufacturability7
CC483K's machinability is fair (45/100, better than 64% of copper alloy grades); weldability poor (25/100); 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. CC483K is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC483K
Is CC483K easy to machine?
Machines to a good finish with sharp, positive-rake carbide and light feeds, but the hard δ-phase makes chips short and abrasive — expect roughly a fifth the throughput of free-cutting brass and use flood coolant.
Can CC483K be welded?
Fusion welding is unreliable (hot-short, tin oxidation and porosity); repair by TIG with matching bronze filler and preheat 150–200 °C, or preferably braze/silver-solder.
Can CC483K be formed, bent or molded?
Not cold formable — supply only as-cast; casting needs strong risering because of the wide freezing range and a slow, low-turbulence pour to avoid tin sweat and inverse segregation.
CC483K 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 |
|---|---|---|
| Snprincipal alloying element, forms hard δ-phase | 11 – 13 | 12 |
| Pdeoxidant; raises hardness/wear resistance | 0.01 – 0.4 | 0.25 |
| Pbimpurity limit — lead-free grade | ≤ 0.25 | |
| Ni | ≤ 2 | |
| Zn | ≤ 0.5 | |
| Fe | ≤ 0.2 | |
| Sb | ≤ 0.3 | |
| S | ≤ 0.1 | |
| Altightly limited — causes casting defects | ≤ 0.01 | |
| Si | ≤ 0.01 | |
| Mn | ≤ 0.2 | |
| Curemainder, approx. 86–88 % | balance |
What surface finishes work on CC483K?
Takes a bright polish and readily accepts tin, nickel or chrome plating; bearing bores are normally finish-bored or honed rather than reamed, and no anodizing is 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).
Equivalent designations
Standards and trade names that resolve to Copper Alloy CC483K in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuSn12-CG-CuSn12
How much does CC483K cost?
CC483K 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.
CC483K — frequently asked
What is CC483K used for?
CC483K is typically used for worm gears, bushings, bearing bushes, high-load slides and gear wheels. In short: lead-free 12 % tin bronze; hardest standard tin bronze; gear and bearing grade.
What is the yield strength of CC483K?
CC483K has a typical yield strength of 190 MPa (27.6 ksi) and a tensile strength of 320 MPa (46.4 ksi) — weaker than 57% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is CC483K easy to machine?
Reasonably — machinability is rated fair (45/100, better than 64% of copper alloy grades). Machines to a good finish with sharp, positive-rake carbide and light feeds, but the hard δ-phase makes chips short and abrasive — expect roughly a fifth the throughput of free-cutting brass and use flood coolant.
Can CC483K be welded?
Not readily — weldability is rated poor (25/100). Fusion welding is unreliable (hot-short, tin oxidation and porosity); repair by TIG with matching bronze filler and preheat 150–200 °C, or preferably braze/silver-solder.
What surface finishes work on CC483K?
Takes a bright polish and readily accepts tin, nickel or chrome plating; bearing bores are normally finish-bored or honed rather than reamed, and no anodizing is applicable.
Can CC483K be formed, bent or molded?
Not cold formable — supply only as-cast; casting needs strong risering because of the wide freezing range and a slow, low-turbulence pour to avoid tin sweat and inverse segregation.
What is the maximum service temperature of CC483K?
CC483K 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 CC483K-GC and CC483K-GS?
GC is the default condition — standard stocked form (solid and hollow bar) for machined bearings, nuts and slide plates; finest, most uniform structure. GS: large or one-off bushings, worm wheels and housings where section size rules out chill or continuous casting. Yield strength is 190 MPa in GC versus 160 MPa in GS.
How much does CC483K cost?
CC483K 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 — CEN (2017)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper alloy datasheets (CuSn12-C / C90700-C90800 class) — Copper Development Association / DKI (2020)
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.