Copper Alloy C83300
UNS C83300
C83300 (CC490K) is a high-copper leaded red brass casting alloy, with lead added for free machining and a copper-rich matrix that keeps conductivity high at 145 W/m·K and 32 % IACS.
Reference datasheet — C83300 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 M01 condition
C83300 tempers and conditions
C83300 is supplied in 5 conditions, soft to hard. M01 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 |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard stocked condition for valve bodies, fittings and electrical hardware poured to ASTM B584. | 69 | 234 | 35 | 35 HB | 32 % IACS |
As chill cast | Use for intricate near-net electrical/plumbing components where tooling for a mold is not justified. | 69 | 234 | 32 | 35 HB | 32 % IACS |
As plaster cast | Niche route for thin-walled, high-detail prototype castings; mechanicals similar to sand cast. | 69 | 228 | 33 | 34 HB | 32 % IACS |
As centrifugally cast | Choose for higher-volume small parts needing finer grain, better surface and slightly higher strength than sand casting. | 76 | 241 | 30 | 40 HB | 32 % IACS |
As continuous cast | Best choice for machined electrical contacts, bushings and hollow bar — densest, most uniform structure and highest strength. | 103 | 262 | 25 | 50 HB | 32 % IACS |
What is C83300?
C83300 (CC490K) is a high-copper leaded red brass casting alloy, with lead added for free machining and a copper-rich matrix that keeps conductivity high at 145 W/m·K and 32 % IACS. Engineers choose it for electrical and plumbing castings that must be pressure tight and easy to machine, with 69 MPa yield, 234 MPa tensile, 35 % elongation and 35 HB in sand, permanent-mould and continuous cast conditions (M01, M02, M03, M05, M07). Strength is low, arc welding is not recommended because of lead, and lead content restricts use in potable-water parts under low-lead rules. Unleaded silicon or aluminium cast brasses are the usual substitutes for drinking-water duty. C83300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,010°C (1,850 °F). C83300 has a yield strength of 69 MPa (10 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 96% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 96.5 GPa (14 Msi).
What is C83300 used for?
- electrical fittings
- plumbing components
- pressure-tight castings
Advantages
- Easy to machine — 85/100, better than 93% of copper alloy grades
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- Ductile — tolerates forming and impact — 35%, better than 80% of copper alloy grades
Limitations
- Low strength — 69 MPa (10 ksi), worse than 96% of copper alloy grades
- Low stiffness — 96.5 GPa (14 Msi), worse than 90% of copper alloy grades
C83300 properties
Typical room-temperature values for C83300-M01; bars are the position among copper alloy grades.
Physical3
C83300 has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 58% of copper alloy grades. It melts at 1,010°C (1,850 °F).
Mechanical13
C83300 has a yield strength of 69 MPa (10 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 96% of copper alloy grades. Elongation at break is 35% and the elastic modulus is 96.5 GPa (14 Msi).
Thermal6
C83300 is rated for continuous service to 200°C (392 °F). It conducts heat at 145 W/m·K (83.8 BTU/hr·ft·°F), better than 72% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C83300 conducts electricity at 32 % IACS, better than 72% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 57% of copper alloy grades.
Sustainability4
Producing a kilogram of C83300 takes about 48 MJ of energy and emits 3.2 kg of CO₂ — less than 92% of copper alloy grades. Typical recycled content is 88%.
Manufacturability8
C83300's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability poor (30/100); formability poor (25/100).
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. C83300 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C83300
Is C83300 easy to machine?
Excellent free-machining behaviour (≈90% of C36000) — use sharp positive-rake tools, light feeds and flood coolant; lead chips break cleanly but require dust/fume control.
Can C83300 be welded?
Arc welding is not recommended because of lead; soldering and silver brazing are excellent, oxyacetylene/braze repair of castings is fair with low-fuming filler.
Can C83300 be formed, bent or molded?
A casting alloy only — good fluidity and pressure tightness in sand, permanent-mold and continuous casting; feed with generous risers due to the wide freezing range.
C83300 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 |
|---|---|---|
| Cuhigh Cu gives the elevated conductivity | 92 – 94 | 93 |
| Sn | 1 – 2 | 1.5 |
| Pbmachinability and pressure tightness; not potable-water (lead-free) compliant | 1 – 2 | 1.5 |
| Fe | ≤ 0.3 | |
| Zn | ≥ 2 (balance) |
What surface finishes work on C83300?
Takes bright buffing, tin, nickel and chrome plating well; anodizing is not applicable — protect with lacquer, benzotriazole or chemical patina for architectural use.
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 C83300 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- CC490K
How much does C83300 cost?
C83300 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.
C83300 — frequently asked
What is C83300 used for?
C83300 is typically used for electrical fittings, plumbing components and pressure-tight castings. In short: free-machining red brass; high conductivity cast brass; leaded, not weldable.
What is the yield strength of C83300?
C83300 has a typical yield strength of 69 MPa (10 ksi) and a tensile strength of 234 MPa (33.9 ksi) — weaker than 96% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C83300 easy to machine?
Yes — machinability is rated excellent (85/100, better than 93% of copper alloy grades). Excellent free-machining behaviour (≈90% of C36000) — use sharp positive-rake tools, light feeds and flood coolant; lead chips break cleanly but require dust/fume control.
Can C83300 be welded?
Not readily — weldability is rated poor (30/100). Arc welding is not recommended because of lead; soldering and silver brazing are excellent, oxyacetylene/braze repair of castings is fair with low-fuming filler.
What surface finishes work on C83300?
Takes bright buffing, tin, nickel and chrome plating well; anodizing is not applicable — protect with lacquer, benzotriazole or chemical patina for architectural use.
Can C83300 be formed, bent or molded?
A casting alloy only — good fluidity and pressure tightness in sand, permanent-mold and continuous casting; feed with generous risers due to the wide freezing range.
What is the maximum service temperature of C83300?
C83300 is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C83300-M01 and C83300-M07?
M01 is the default condition — standard stocked condition for valve bodies, fittings and electrical hardware poured to ASTM B584. M07: best choice for machined electrical contacts, bushings and hollow bar — densest, most uniform structure and highest strength. Yield strength is 69 MPa in M01 versus 103 MPa in M07.
How much does C83300 cost?
C83300 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
- ASTM B584 — Standard Specification for Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B505/B505M — Copper Alloy Continuous Castings — ASTM International (2018)
- ASTM B806 — Copper Alloy Permanent Mold Castings for General Applications — ASTM International (2020)
- CDA Alloy Database — C83300 Leaded Red Brass — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.