Copper Alloy C80700-M05
Finish state
UNS C80700 · ASTM B369
M05 = as plaster cast
Choose for rings, sleeves and hollow conductive bodies needing denser, more gas-free metal than sand casting.
Values for the M05 condition
Other C80700 tempers and conditions
C80700 is listed in 3 conditions; see the grade overview at C80700.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
M01Default As sand cast | Standard as-cast sand-mold condition for general electrical/thermal copper castings. | 62 | 172 | 40 | 44 HB | 92 % IACS |
M05This page As plaster cast | Choose for rings, sleeves and hollow conductive bodies needing denser, more gas-free metal than sand casting. | 70 | 185 | 40 | 48 HB | 93 % IACS |
As continuous cast | Continuous-cast bar/tube stock — the soundest, most uniform form for machined conductive parts and electrode holders. | 75 | 195 | 38 | 50 HB | 94 % IACS |
What is C80700-M05?
C80700-M05 is C80700 supplied in the M05 condition — choose for rings, sleeves and hollow conductive bodies needing denser, more gas-free metal than sand casting. C80700-M05 has a yield strength of 70 MPa (10.2 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 93% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi). C80700-M05 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F). M01 is the default condition FabDigit quotes; M05 is available on request or by drawing note.
Advantages
- Readily welded — 80/100, better than 93% of copper alloy grades
- Conducts heat well — 355 W/m·K (205.1 BTU/hr·ft·°F), better than 90% of copper alloy grades
- High electrical conductivity — 93 % IACS, better than 90% of copper alloy grades
- Forms and bends easily — 90/100, better than 89% of copper alloy grades
- Ductile — tolerates forming and impact — 40%, better than 84% of copper alloy grades
Limitations
- Low strength — 70 MPa (10.2 ksi), worse than 93% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
C80700-M05 properties
Typical room-temperature values for C80700-M05; 20 are specific to this condition. Other listed values are C80700 reference data and may not represent this condition. Bars are the position among copper alloy grades.
Physical3
C80700-M05 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,065°C (1,949 °F).
Mechanical14
C80700-M05 has a yield strength of 70 MPa (10.2 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 93% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C80700-M05 is rated for continuous service to 200°C (392 °F). It conducts heat at 355 W/m·K (205.1 BTU/hr·ft·°F), better than 90% of copper alloy grades. Thermal expansion is 17.7 µm/m·K (9.83 µin/in·°F).
Electrical3
C80700-M05 conducts electricity at 93 % IACS, better than 90% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 68% of copper alloy grades.
Sustainability4
Producing a kilogram of C80700-M05 takes about 53 MJ of energy and emits 3.6 kg of CO₂ — less than 85% of copper alloy grades. Typical recycled content is 45%.
Manufacturability7
C80700-M05's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability very good (80/100); formability excellent (90/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with C80700-M05
Is C80700 easy to machine?
Gummy and long-chipping — use sharp positive-rake tools, high speed, low feed and generous coolant; rating only ~20 % of AISI 1212.
Can C80700 be welded?
Readily GTAW/GMAW welded with deoxidized copper filler (ERCu) and 250–500 °C preheat due to the very high thermal conductivity; keep hydrogen out of the arc.
Can C80700 be formed, bent or molded?
Poor fluidity and strong gas absorption — needs high pouring temperature, heavy risering/chills, protective melting and boron/lithium deoxidation to avoid porosity.
What surface finishes work on C80700?
Solders and brazes easily; can be electroplated (Ni, Ag, Sn) or polished bright, but bare surfaces tarnish and need lacquer or plating for appearance.
C80700 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 |
|---|---|---|
| Bboron deoxidizer residual | 0.02 – 0.04 | 0.03 |
| Agcounted as copper when present | — | — |
| Cuincluding silver | ≥ 99.7 (balance) | — |
C80700-M05 — frequently asked
What is C80700-M05 used for?
C80700-M05 is typically used for electrical conductor castings, plumbing and water fittings, valve and waterway bodies, terminal and connector castings, heat-transfer components and grounding lugs. In short: general-purpose cast copper; 92% IACS, 350 W/m·K; very ductile at 40% elongation.
What is the yield strength of C80700-M05?
C80700-M05 has a typical yield strength of 70 MPa (10.2 ksi) and a tensile strength of 185 MPa (26.8 ksi) — weaker than 93% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C80700-M05 easy to machine?
Not especially — machinability is rated poor (25/100, worse than 86% of copper alloy grades). Gummy and long-chipping — use sharp positive-rake tools, high speed, low feed and generous coolant; rating only ~20 % of AISI 1212.
Can C80700-M05 be welded?
Yes — weldability is rated very good (80/100). Readily GTAW/GMAW welded with deoxidized copper filler (ERCu) and 250–500 °C preheat due to the very high thermal conductivity; keep hydrogen out of the arc.
What surface finishes work on C80700-M05?
Solders and brazes easily; can be electroplated (Ni, Ag, Sn) or polished bright, but bare surfaces tarnish and need lacquer or plating for appearance.
Can C80700-M05 be formed, bent or molded?
Poor fluidity and strong gas absorption — needs high pouring temperature, heavy risering/chills, protective melting and boron/lithium deoxidation to avoid porosity.
What is the maximum service temperature of C80700-M05?
C80700-M05 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 C80700-M01 and C80700-M07?
M01 is the default condition — standard as-cast sand-mold condition for general electrical/thermal copper castings. M07: continuous-cast bar/tube stock — the soundest, most uniform form for machined conductive parts and electrode holders. Yield strength is 62 MPa in M01 versus 75 MPa in M07.
Sources
- ASTM B824 — General Requirements for Copper Alloy Castings — ASTM International (2021)
- ASTM B369 — Copper Alloy Castings (Cu-Ni and related cast coppers) — ASTM International (2019)
- CDA / copper.org Cast Copper Alloy Datasheets (C80100–C81100) — Copper Development Association (2023)
- 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.