Copper Alloy C87610 M01-SR
Heat-treated state
UNS C87610
M01-SR = sand cast + stress relief anneal
Use when tight dimensional stability after machining or resistance to residual-stress cracking is required.
Values for the M01-SR condition
Other C87610 tempers and conditions
C87610 is listed in 6 conditions; see the grade overview at C87610.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01-SRThis page Sand cast + stress relief anneal | Use when tight dimensional stability after machining or resistance to residual-stress cracking is required. | 160 | 370 | 22 | 95 HB | 6.9 % IACS |
M01Default As sand cast | Default condition for valve bodies, pump housings and water-meter parts poured in green/no-bake sand molds. | 170 | 380 | 20 | 100 HB | 6.7 % IACS |
As pressure die cast | Near-net-shape small valve internals and decorative hardware needing fine detail and low machining stock. | 180 | 400 | 20 | 105 HB | 6.7 % IACS |
As centrifugally cast | Pick for sleeves, bushings and pump wear rings needing a dense, inclusion-free wall. | 185 | 400 | 22 | 105 HB | 6.7 % IACS |
As plaster cast | Higher-volume fittings where faster solidification gives finer grain and better surface than sand. | 190 | 415 | 20 | 110 HB | 6.7 % IACS |
As continuous cast | Continuous-cast bar and tube stock for machined low-lead plumbing fittings; most uniform, porosity-free structure. | 195 | 420 | 22 | 110 HB | 6.7 % IACS |
What is C87610 M01-SR?
C87610 M01-SR is C87610 heat treated to M01-SR — use when tight dimensional stability after machining or resistance to residual-stress cracking is required. C87610 M01-SR has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 370 MPa (53.7 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 105 GPa (15.2 Msi). C87610 M01-SR has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 820°C (1,508 °F). M01 is the default condition FabDigit quotes; M01-SR is available on request or by drawing note.
Advantages
- Readily welded — 88/100, better than 97% of copper alloy grades
- Low embodied carbon — 3.2 kg CO₂/kg, better than 92% of copper alloy grades
- Good corrosion resistance — 75/100, better than 90% 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 — 6.9 % IACS, worse than 88% of copper alloy grades
C87610 M01-SR properties
Typical room-temperature values for C87610 M01-SR; 21 are specific to this condition. Other listed values are C87610 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C87610 M01-SR has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 80% of copper alloy grades. It melts at 820°C (1,508 °F).
Mechanical15
C87610 M01-SR has a yield strength of 160 MPa (23.2 ksi) and a tensile strength of 370 MPa (53.7 ksi) — weaker than 65% of copper alloy grades. Elongation at break is 22% and the elastic modulus is 105 GPa (15.2 Msi).
Thermal6
C87610 M01-SR is rated for continuous service to 225°C (437 °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
C87610 M01-SR conducts electricity at 6.9 % IACS, worse than 88% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), better than 90% of copper alloy grades.
Sustainability4
Producing a kilogram of C87610 M01-SR takes about 48 MJ of energy and emits 3.2 kg of CO₂ — less than 92% of copper alloy grades. Typical recycled content is 75%.
Manufacturability8
C87610 M01-SR's machinability is fair (43/100, better than 60% of copper alloy grades); weldability excellent (88/100); formability poor (22/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C87610 M01-SR
Is C87610 easy to machine?
Machines like a gummy medium-hard bronze (~40–48 % of free-cutting brass): use sharp positive-rake carbide, high speed, generous feed and flood coolant to avoid built-up edge; chips are stringy because of the low lead.
Can C87610 be welded?
Excellent with GTAW/GMAW using ERCuSi-A filler and argon shielding; preheat is normally unnecessary, keep interpass low and avoid heavy oxide films from silicon.
Can C87610 be formed, bent or molded?
Casting alloy with good fluidity and thin-section fill; use adequate risering because of the fairly wide freezing range, and degas the melt to limit hydrogen porosity.
What surface finishes work on C87610?
Not anodizable; takes bright polishing, chemical browning/patina, clear lacquer, or nickel/chrome electroplating over a copper strike.
C87610 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 |
|---|---|---|
| Siprincipal strengthening element | 3 – 5 | 4 |
| Zn | 3 – 5 | 4 |
| Fe | ≤ 0.2 | — |
| Sn | ≤ 0.25 | — |
| Pblow-lead limit for potable-water service (NSF/ANSI 61, AB1953) | ≤ 0.09 | — |
| Almax; controlled to avoid casting defects | ≤ 0.01 | — |
| Mn | ≤ 0.25 | — |
| Ni | ≤ 0.2 | — |
| Curemainder, 90.0 % min per ASTM B584 | ≥ 90 (balance) | — |
C87610 M01-SR — frequently asked
What is C87610 M01-SR used for?
C87610 M01-SR is typically used for pump housings, valve bodies, marine fittings and plumbing hardware. In short: low-lead plumbing bronze; alloy 12A silicon bronze; good thin-section fill.
What is the yield strength of C87610 M01-SR?
C87610 M01-SR has a typical yield strength of 160 MPa (23.2 ksi) and a tensile strength of 370 MPa (53.7 ksi) — weaker than 65% of copper alloy grades. Strength varies by condition: see the 6 listed tempers.
Is C87610 M01-SR easy to machine?
Not especially — machinability is rated fair (43/100, better than 60% of copper alloy grades). Machines like a gummy medium-hard bronze (~40–48 % of free-cutting brass): use sharp positive-rake carbide, high speed, generous feed and flood coolant to avoid built-up edge; chips are stringy because of the low lead.
Can C87610 M01-SR be welded?
Yes — weldability is rated excellent (88/100). Excellent with GTAW/GMAW using ERCuSi-A filler and argon shielding; preheat is normally unnecessary, keep interpass low and avoid heavy oxide films from silicon.
What surface finishes work on C87610 M01-SR?
Not anodizable; takes bright polishing, chemical browning/patina, clear lacquer, or nickel/chrome electroplating over a copper strike.
Can C87610 M01-SR be formed, bent or molded?
Casting alloy with good fluidity and thin-section fill; use adequate risering because of the fairly wide freezing range, and degas the melt to limit hydrogen porosity.
What is the maximum service temperature of C87610 M01-SR?
C87610 M01-SR is rated for continuous use to about 225°C (437 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C87610-M01 and C87610-M07?
M01 is the default condition — default condition for valve bodies, pump housings and water-meter parts poured in green/no-bake sand molds. M07: continuous-cast bar and tube stock for machined low-lead plumbing fittings; most uniform, porosity-free structure. Yield strength is 170 MPa in M01 versus 195 MPa in M07.
Sources
- ASTM B584 — 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 — C87610 silicon bronze — Copper Development Association (2024)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- NSF/ANSI 61 & 372 low-lead drinking-water requirements — NSF International (2023)
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.