Copper Alloy C83300-M02
Heat-treated state
UNS C83300
M02 = as centrifugally cast
Choose for higher-volume small parts needing finer grain, better surface and slightly higher strength than sand casting.
Values for the M02 condition
Other C83300 tempers and conditions
C83300 is listed in 5 conditions; see the grade overview at C83300.
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 |
M02This page 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-M02?
C83300-M02 is C83300 heat treated to M02 — choose for higher-volume small parts needing finer grain, better surface and slightly higher strength than sand casting. C83300-M02 has a yield strength of 76 MPa (11 ksi) and a tensile strength of 241 MPa (35 ksi) — weaker than 91% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 96.5 GPa (14 Msi). C83300-M02 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). M01 is the default condition FabDigit quotes; M02 is available on request or by drawing note.
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 — 30%, better than 75% of copper alloy grades
Limitations
- Low strength — 76 MPa (11 ksi), worse than 91% of copper alloy grades
- Low stiffness — 96.5 GPa (14 Msi), worse than 90% of copper alloy grades
C83300-M02 properties
Typical room-temperature values for C83300-M02; 19 are specific to this condition. Other listed values are C83300 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C83300-M02 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-M02 has a yield strength of 76 MPa (11 ksi) and a tensile strength of 241 MPa (35 ksi) — weaker than 91% of copper alloy grades. Elongation at break is 30% and the elastic modulus is 96.5 GPa (14 Msi).
Thermal6
C83300-M02 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-M02 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-M02 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-M02's machinability is excellent (85/100, better than 93% of copper alloy grades); weldability poor (30/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C83300-M02
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.
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.
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) | — |
C83300-M02 — frequently asked
What is C83300-M02 used for?
C83300-M02 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-M02?
C83300-M02 has a typical yield strength of 76 MPa (11 ksi) and a tensile strength of 241 MPa (35 ksi) — weaker than 91% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C83300-M02 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-M02 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-M02?
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-M02 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-M02?
C83300-M02 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.