Copper Alloy CC498K
EN CC498K
A general-purpose leaded tin-zinc bronze casting alloy offering a balance of good castability, moderate strength, corrosion resistance, and machinability with a small amount of lead for improved chip control.
Reference datasheet — CC498K 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
CC498K tempers and conditions
CC498K 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 | Choose for one-off or large, complex housings, valve bodies and pump casings where dimensional tolerance is less critical. | 110 | 230 | 15 | 65 HB | 12 % IACS |
Permanent (chill) mould cast | Choose for medium-to-large series of small parts needing finer grain, tighter tolerances and slightly higher strength than sand casting. | 130 | 260 | 13 | 72 HB | 12 % IACS |
Centrifugally cast | Choose for large-diameter bushings, wear rings and worm-wheel rims where a dense, porosity-free wall is required. | 140 | 270 | 13 | 75 HB | 12 % IACS |
GCDefault Continuously cast bar/tube | Default stock form: continuous-cast round bar and tube for machined bushings, nuts, glands and guide elements — densest structure and best machined surface. | 150 | 270 | 12 | 78 HB | 12.5 % IACS |
What is CC498K?
A general-purpose leaded tin-zinc bronze casting alloy offering a balance of good castability, moderate strength, corrosion resistance, and machinability with a small amount of lead for improved chip control. CC498K has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 855°C (1,571 °F). CC498K has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 96 GPa (13.9 Msi).
What is CC498K used for?
- Valve bodies
- Pump housings
- Fittings and flanges
- General hardware castings
- Low-to-moderate load bearing components
Advantages
- Easy to machine — 82/100, better than 90% of copper alloy grades
Limitations
- Low stiffness — 96 GPa (13.9 Msi), worse than 91% of copper alloy grades
- Limited formability — 12/100, worse than 85% of copper alloy grades
CC498K properties
Typical room-temperature values for CC498K-GC; bars are the position among copper alloy grades.
Physical3
CC498K has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 855°C (1,571 °F).
Mechanical14
CC498K has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 69% of copper alloy grades. Elongation at break is 12% and the elastic modulus is 96 GPa (13.9 Msi).
Thermal6
CC498K is rated for continuous service to 250°C (482 °F). It conducts heat at 62 W/m·K (35.8 BTU/hr·ft·°F), worse than 58% of copper alloy grades. Thermal expansion is 18.5 µm/m·K (10.3 µin/in·°F).
Electrical3
CC498K conducts electricity at 12.5 % IACS, worse than 60% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (66/100), better than 64% of copper alloy grades.
Sustainability4
Producing a kilogram of CC498K takes about 50 MJ of energy and emits 3.5 kg of CO₂ — less than 89% of copper alloy grades. Typical recycled content is 60%.
Manufacturability8
CC498K's machinability is very good (82/100, better than 90% of copper alloy grades); weldability poor (30/100); formability not recommended (12/100).
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. CC498K is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CC498K
Is CC498K easy to machine?
Very free-machining thanks to the lead phase — use sharp positive-rake carbide or HSS tools, high speed, light feed and plenty of coolant; chips break short, so single-point boring of bushings gives excellent surface finish.
Can CC498K be welded?
Poor fusion weldability because lead causes hot cracking and porosity; repair by brazing or by TIG with matched Cu-Sn filler only after preheating and with acceptance of reduced properties.
Can CC498K be formed, bent or molded?
Foundry alloy with wide freezing range: feed generously with risers and chills to avoid interdendritic microporosity; not suitable for cold forming, only light coining/burnishing of machined bores.
CC498K 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 | 5 – 7 | 6 |
| Zn | 3 – 5 | 4 |
| Pbfree-machining / conformability addition | 1 – 3 | 2 |
| Niimpurity limit, Ni counted with Co | ≤ 2 | |
| Feimpurity | ≤ 0.3 | |
| Sbimpurity | ≤ 0.3 | |
| Pimpurity | ≤ 0.1 | |
| Simpurity | ≤ 0.1 | |
| Alimpurity, harmful to castability | ≤ 0.01 | |
| Siimpurity | ≤ 0.01 | |
| Curemainder, typically 85–89 % | balance |
What surface finishes work on CC498K?
Takes tin, nickel or chrome plating and chemical patination well; can be polished to a bright bronze lustre, but lead smearing may require light chemical bright-dip before plating.
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 CC498K in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- CuSn6Zn4Pb2-C
- Similar grades
- ZCuSn6Zn6Pb3
How much does CC498K cost?
CC498K 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.
CC498K — frequently asked
What is CC498K used for?
CC498K is typically used for valve bodies, pump housings, fittings and flanges, general hardware castings and low-to-moderate load bearing components. In short: free-machining cast bronze; stronger than gunmetal CC499K; poor fusion weldability.
What is the yield strength of CC498K?
CC498K has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 270 MPa (39.2 ksi) — weaker than 69% of copper alloy grades. Strength varies by condition: see the 4 listed tempers.
Is CC498K easy to machine?
Yes — machinability is rated very good (82/100, better than 90% of copper alloy grades). Very free-machining thanks to the lead phase — use sharp positive-rake carbide or HSS tools, high speed, light feed and plenty of coolant; chips break short, so single-point boring of bushings gives excellent surface finish.
Can CC498K be welded?
Not readily — weldability is rated poor (30/100). Poor fusion weldability because lead causes hot cracking and porosity; repair by brazing or by TIG with matched Cu-Sn filler only after preheating and with acceptance of reduced properties.
What surface finishes work on CC498K?
Takes tin, nickel or chrome plating and chemical patination well; can be polished to a bright bronze lustre, but lead smearing may require light chemical bright-dip before plating.
Can CC498K be formed, bent or molded?
Foundry alloy with wide freezing range: feed generously with risers and chills to avoid interdendritic microporosity; not suitable for cold forming, only light coining/burnishing of machined bores.
What is the maximum service temperature of CC498K?
CC498K 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 CC498K-GC and CC498K-GS?
GC is the default condition — default stock form: continuous-cast round bar and tube for machined bushings, nuts, glands and guide elements — densest structure and best machined surface. GS: choose for one-off or large, complex housings, valve bodies and pump casings where dimensional tolerance is less critical. Yield strength is 150 MPa in GC versus 110 MPa in GS.
How much does CC498K cost?
CC498K 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)
- CDA / copper.org cast bronze alloy datasheets — Copper Development Association (2023)
- Continuous-cast leaded tin bronze bushing bar datasheets — European and Chinese bronze foundries (2024)
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.