Copper Alloy C80700
UNS C80700 · ASTM B369
C80700 is a standard cast copper to ASTM B369 used for general-purpose electrical and structural copper castings.
Reference datasheet — C80700 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
C80700 tempers and conditions
C80700 is supplied in 3 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
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 |
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?
C80700 is a standard cast copper to ASTM B369 used for general-purpose electrical and structural copper castings. It provides 92% IACS and 350 W/m·K with 62 MPa yield, 172 MPa tensile, 40% elongation and 44 HB, and it solders, brazes and welds readily, which suits electrical castings and plumbing fittings operating up to about 200 °C. Casting is the limiting step: fluidity is poor and gas absorption is high, so sections must be simple and well fed. C80500 is the closest alternative and C80300 is used when full 100% IACS conductivity is needed. C80700 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). C80700 has a yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi).
What is C80700 used for?
- Electrical conductor castings
- Plumbing and water fittings
- Valve and waterway bodies
- Terminal and connector castings
- Heat-transfer components
- Grounding lugs
Advantages
- Readily welded — 80/100, better than 93% of copper alloy grades
- High electrical conductivity — 92 % IACS, better than 89% of copper alloy grades
- Forms and bends easily — 90/100, better than 89% of copper alloy grades
- Conducts heat well — 350 W/m·K (202.2 BTU/hr·ft·°F), better than 88% of copper alloy grades
- Ductile — tolerates forming and impact — 40%, better than 84% of copper alloy grades
Limitations
- Low strength — 62 MPa (8.99 ksi), worse than 99% of copper alloy grades
- Difficult to machine — 25/100, worse than 86% of copper alloy grades
C80700 properties
Typical room-temperature values for C80700-M01; bars are the position among copper alloy grades.
Physical3
C80700 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 has a yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Elongation at break is 40% and the elastic modulus is 117 GPa (17 Msi).
Thermal6
C80700 is rated for continuous service to 200°C (392 °F). It conducts heat at 350 W/m·K (202.2 BTU/hr·ft·°F), better than 88% of copper alloy grades. Thermal expansion is 17.7 µm/m·K (9.83 µin/in·°F).
Electrical3
C80700 conducts electricity at 92 % IACS, better than 89% 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 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's machinability is poor (25/100, worse than 86% of copper alloy grades); weldability very good (80/100); formability excellent (90/100).
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. C80700 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C80700
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.
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) |
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.
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 C80700 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B369
How much does C80700 cost?
C80700 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.
C80700 — frequently asked
What is C80700 used for?
C80700 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?
C80700 has a typical yield strength of 62 MPa (8.99 ksi) and a tensile strength of 172 MPa (24.9 ksi) — weaker than 99% of copper alloy grades. Strength varies by condition: see the 3 listed tempers.
Is C80700 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 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?
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 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?
C80700 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.
How much does C80700 cost?
C80700 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 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; 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.