Copper Alloy C87300-M06
Finish state
UNS C87300
M06 = as investment cast
Use for thin-wall, near-net marine hardware and impellers where surface finish and detail matter.
Values for the M06 condition
Other C87300 tempers and conditions
C87300 is listed in 5 conditions; see the grade overview at C87300.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand foundry condition for pump bodies, valves and marine fittings per ASTM B584. | 200 | 379 | 30 | 85 HB | 6.7 % IACS |
M06This page As investment cast | Use for thin-wall, near-net marine hardware and impellers where surface finish and detail matter. | 210 | 400 | 25 | 88 HB | 6.7 % IACS |
As plaster cast | Chill-cast condition for medium-volume valve and fitting production with tighter dimensions and finer grain. | 215 | 410 | 28 | 90 HB | 6.7 % IACS |
As centrifugally cast | Pick for pressure-tight rings, bushings and sleeves — denser, finer structure gives slightly higher strength than sand cast. | 220 | 415 | 27 | 90 HB | 6.7 % IACS |
As continuous cast | Continuous-cast bar and tube stock — highest strength and soundest structure for machined parts. | 235 | 425 | 24 | 95 HB | 7 % IACS |
What is C87300-M06?
C87300-M06 is C87300 supplied in the M06 condition — use for thin-wall, near-net marine hardware and impellers where surface finish and detail matter. C87300-M06 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 52% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 103 GPa (14.9 Msi). C87300-M06 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 917°C (1,683 °F). M01 is the default condition FabDigit quotes; M06 is available on request or by drawing note.
Advantages
- Readily welded — 92/100, better than 99% of copper alloy grades
- Good corrosion resistance — 74/100, better than 88% of copper alloy grades
Limitations
- Poor heat conductor — 29 W/m·K (16.8 BTU/hr·ft·°F), worse than 93% of copper alloy grades
- Low electrical conductivity — 6.7 % IACS, worse than 89% of copper alloy grades
- Limited formability — 18/100, worse than 75% of copper alloy grades
C87300-M06 properties
Typical room-temperature values for C87300-M06; 21 are specific to this condition. Other listed values are C87300 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C87300-M06 has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 917°C (1,683 °F).
Mechanical11
C87300-M06 has a yield strength of 210 MPa (30.5 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 52% of copper alloy grades. Elongation at break is 25% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
C87300-M06 is rated for continuous service to 200°C (392 °F). It conducts heat at 29 W/m·K (16.8 BTU/hr·ft·°F), worse than 93% of copper alloy grades. Thermal expansion is 18 µm/m·K (10 µin/in·°F).
Electrical3
C87300-M06 conducts electricity at 6.7 % IACS, worse than 89% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 88% of copper alloy grades.
Sustainability4
Producing a kilogram of C87300-M06 takes about 55 MJ of energy and emits 3.8 kg of CO₂ — less than 72% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
C87300-M06's machinability is fair (40/100, better than 57% of copper alloy grades); weldability excellent (92/100); formability poor (18/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C87300-M06
Is C87300 easy to machine?
Gummy, tough chips — rating ~40% of free-cutting brass; use sharp positive-rake tools, high speed with light-to-moderate feed, generous coolant and avoid dwelling.
Can C87300 be welded?
Excellent — GTAW/GMAW with ERCuSi-A filler, argon shielding, no preheat needed for thin walls; keep interpass temperature low to limit silicate inclusions.
Can C87300 be formed, bent or molded?
Excellent fluidity and low shrinkage for thin-wall sand, permanent-mold, investment and continuous casting; degas and use good gating/filtering to avoid silicon-oxide dross entrapment.
What surface finishes work on C87300?
Takes a bright polish and chemical patinas well; electroplate (Ni/Cr) or clear-lacquer for stable appearance — anodizing is not applicable.
C87300 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 |
|---|---|---|
| Siprimary solid-solution strengthener | 3.5 – 4.5 | 4 |
| Mn | 0.8 – 1.5 | 1.1 |
| Zn | ≤ 0.25 | — |
| Fe | ≤ 0.2 | — |
| Al | ≤ 0.5 | — |
| Sn | ≤ 0.25 | — |
| Pbmax; low-lead grade suited to potable-water service | ≤ 0.09 | — |
| Cu | ≥ 94 (balance) | — |
C87300-M06 — frequently asked
What is C87300-M06 used for?
C87300-M06 is typically used for valve components, marine fittings, pump housings and decorative castings. In short: most ductile silicon bronze; thin-wall casting alloy; lead-free and weldable.
What is the yield strength of C87300-M06?
C87300-M06 has a typical yield strength of 210 MPa (30.5 ksi) and a tensile strength of 400 MPa (58 ksi) — weaker than 52% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C87300-M06 easy to machine?
Not especially — machinability is rated fair (40/100, better than 57% of copper alloy grades). Gummy, tough chips — rating ~40% of free-cutting brass; use sharp positive-rake tools, high speed with light-to-moderate feed, generous coolant and avoid dwelling.
Can C87300-M06 be welded?
Yes — weldability is rated excellent (92/100). Excellent — GTAW/GMAW with ERCuSi-A filler, argon shielding, no preheat needed for thin walls; keep interpass temperature low to limit silicate inclusions.
What surface finishes work on C87300-M06?
Takes a bright polish and chemical patinas well; electroplate (Ni/Cr) or clear-lacquer for stable appearance — anodizing is not applicable.
Can C87300-M06 be formed, bent or molded?
Excellent fluidity and low shrinkage for thin-wall sand, permanent-mold, investment and continuous casting; degas and use good gating/filtering to avoid silicon-oxide dross entrapment.
What is the maximum service temperature of C87300-M06?
C87300-M06 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 C87300-M01 and C87300-M07?
M01 is the default condition — standard as-cast sand foundry condition for pump bodies, valves and marine fittings per ASTM B584. M07: continuous-cast bar and tube stock — highest strength and soundest structure for machined parts. Yield strength is 200 MPa in M01 versus 235 MPa in M07.
Sources
- ASTM B584 — Copper Alloy Sand Castings for General Applications — ASTM International (2022)
- ASTM B806 / B505 — Continuous and Centrifugal Copper Alloy Castings — ASTM International (2021)
- ASTM B601 — Temper Designations for Copper and Copper Alloys — ASTM International (2019)
- C87300 Alloy Datasheet (Copper Development Association) — copper.org (2024)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — 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.