Copper Alloy C71500
UNS C71500 · ASTM B111/B466 · EN CuNi30Mn1Fe, CW354H
CuNi30Mn1Fe (C71500, BFe30-1-1) is a 70/30 copper-nickel with manganese and iron additions, available in annealed O61 through H04 and H80 tempers, HR50 and H55, and in as-built and heat-treated AM conditions.
Reference datasheet — C71500 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 O61 condition
C71500 tempers and conditions
C71500 is supplied in 9 conditions, soft to hard. O61 is the default FabDigit quotes; the values on this page are for it.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
O61Default Annealed | Default stock condition for tube, plate and sheet — maximum ductility for bending, expanding and welding. | 140 | 380 | 45 | 80 HB | — |
AM heat treated | Post-processed AM condition: homogenised, low residual stress, ductility and seawater corrosion behaviour close to wrought annealed. | 165 | 400 | 40 | 85 HB | 4.5 % IACS |
AM as-built | Printed CuNi30 parts with fine cellular structure — strength between annealed and half-hard wrought, with residual stress. | 260 | 450 | 30 | 110 HB | 4.1 % IACS |
Light drawn | Standard condenser/heat-exchanger tube temper: higher strength than annealed while still expandable into tubesheets. | 275 | 415 | 30 | 105 HB | 4.6 % IACS |
Quarter hard | Mild cold work for parts needing extra stiffness but still moderate bending capability. | 275 | 415 | 25 | 110 HB | 4.6 % IACS |
Drawn and stress relieved | Drawn tube with a low-temperature stress relief — for service where residual stress and distortion must be minimised. | 345 | 450 | 20 | 125 HB | 4.6 % IACS |
Half hard | Good strength/formability compromise for flanges, brackets and machined marine fittings. | 380 | 450 | 15 | 130 HB | 4.6 % IACS |
Full hard | High-strength strip/rod for springs, fasteners and wear surfaces where forming is minimal. | 480 | 515 | 8 | 150 HB | 4.5 % IACS |
Hard drawn | Maximum as-drawn strength for shafting, wire and high-pressure small-bore tube. | 545 | 585 | 4 | 175 HB | 4.5 % IACS |
What is C71500?
CuNi30Mn1Fe (C71500, BFe30-1-1) is a 70/30 copper-nickel with manganese and iron additions, available in annealed O61 through H04 and H80 tempers, HR50 and H55, and in as-built and heat-treated AM conditions. It is specified for seawater service on the strength of a 82 corrosion resistance score, 45% elongation and a 90 formability score, with 140 MPa yield, 380 MPa tensile and 80 HB in the default condition. Strength is modest compared with aluminium bronze, and the alloy is gummy and work-hardening in the cut; C63000 is the alternative where load-bearing strength governs over corrosion behaviour. C71500 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,171°C (2,140 °F). C71500 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 152 GPa (22 Msi).
What is C71500 used for?
- marine hardware
- heat exchanger tubing fittings
- desalination components
Advantages
- Stiff — 152 GPa (22 Msi), better than 99% of copper alloy grades
- Good corrosion resistance — 82/100, better than 98% of copper alloy grades
- High service temperature — 350°C (662 °F), better than 95% of copper alloy grades
- Readily welded — 85/100, better than 95% of copper alloy grades
- Ductile — tolerates forming and impact — 45%, better than 91% of copper alloy grades
Limitations
- Low electrical conductivity — 4.6 % IACS, worse than 96% of copper alloy grades
- High embodied carbon — 7 kg CO₂/kg, worse than 96% of copper alloy grades
- Poor heat conductor — 29 W/m·K (16.8 BTU/hr·ft·°F), worse than 93% of copper alloy grades
C71500 properties
Typical room-temperature values for C71500-O61; bars are the position among copper alloy grades.
Physical3
C71500 has a density of 8.94 g/cm³ (0.323 lb/in³), heavier than 90% of copper alloy grades. It melts at 1,171°C (2,140 °F).
Mechanical14
C71500 has a yield strength of 140 MPa (20.3 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 74% of copper alloy grades. Elongation at break is 45% and the elastic modulus is 152 GPa (22 Msi).
Thermal6
C71500 is rated for continuous service to 350°C (662 °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 16.2 µm/m·K (9 µin/in·°F).
Electrical3
C71500 conducts electricity at 4.6 % IACS, worse than 96% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 98% of copper alloy grades.
Sustainability4
Producing a kilogram of C71500 takes about 110 MJ of energy and emits 7 kg of CO₂ — more than 97% of copper alloy grades. Typical recycled content is 30%.
Manufacturability8
C71500's machinability is poor (30/100, worse than 67% of copper alloy grades); weldability excellent (85/100); 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. C71500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C71500
Is C71500 easy to machine?
Gummy and work-hardening (≈20 % of AISI 1212) — use sharp positive-rake carbide, heavy positive feed, rigid setup and flood coolant to avoid rubbing.
Can C71500 be welded?
Excellent with GTAW/GMAW using ERCuNi (70/30) filler under argon; keep interpass low, avoid oxide/S/Pb contamination and do not use preheat.
Can C71500 be formed, bent or molded?
Very good cold formability in O61 (deep drawing, tube bending, expanding); hot work 900–1050 °C only, anneal 700–850 °C followed by rapid cool.
C71500 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 |
|---|---|---|
| NiNi + Co per ASTM B111/B171 | 29 – 33 | 31 |
| Feimproves impingement/erosion resistance | 0.4 – 1 | 0.6 |
| Mndeoxidiser; GB/T BFe30-1-1 nominal ≈ 1 % | 0 – 1 | 0.7 |
| Zn | ≤ 1 | |
| Pb | ≤ 0.05 | |
| C | ≤ 0.05 | |
| S | ≤ 0.02 | |
| P | ≤ 0.02 | |
| Curemainder, ~67–70 % | balance |
What surface finishes work on C71500?
Not anodizable; polishes to a bright silver-grey, develops a protective adherent film in seawater — allow film formation at low flow before high-velocity service, or apply tin/nickel plating.
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 C71500 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B111/B466
- EN / DIN / Werkstoff-Nr.
- CuNi30Mn1FeCW354H2.0882
- Also called
- B30
- Similar grades
- BFe30-1-1
How much does C71500 cost?
C71500 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.
C71500 — frequently asked
What is C71500 used for?
C71500 is typically used for marine hardware, heat exchanger tubing fittings and desalination components. In short: best seawater corrosion resistance; very formable copper-nickel; standard 70/30 marine alloy.
What is the yield strength of C71500?
C71500 has a typical yield strength of 140 MPa (20.3 ksi) and a tensile strength of 380 MPa (55.1 ksi) — weaker than 74% of copper alloy grades. Strength varies by condition: see the 9 listed tempers.
Is C71500 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 67% of copper alloy grades). Gummy and work-hardening (≈20 % of AISI 1212) — use sharp positive-rake carbide, heavy positive feed, rigid setup and flood coolant to avoid rubbing.
Can C71500 be welded?
Yes — weldability is rated excellent (85/100). Excellent with GTAW/GMAW using ERCuNi (70/30) filler under argon; keep interpass low, avoid oxide/S/Pb contamination and do not use preheat.
What surface finishes work on C71500?
Not anodizable; polishes to a bright silver-grey, develops a protective adherent film in seawater — allow film formation at low flow before high-velocity service, or apply tin/nickel plating.
Can C71500 be formed, bent or molded?
Very good cold formability in O61 (deep drawing, tube bending, expanding); hot work 900–1050 °C only, anneal 700–850 °C followed by rapid cool.
What is the maximum service temperature of C71500?
C71500 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C71500-O61 and C71500-H80?
O61 is the default condition — default stock condition for tube, plate and sheet — maximum ductility for bending, expanding and welding. H80: maximum as-drawn strength for shafting, wire and high-pressure small-bore tube. Yield strength is 140 MPa in O61 versus 545 MPa in H80.
How much does C71500 cost?
C71500 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 B111/B111M — Copper and Copper-Alloy Seamless Condenser Tubes — ASTM (2021)
- ASTM B171/B171M — Copper-Alloy Plate for Condensers and Heat Exchangers — ASTM (2018)
- GB/T 2059 / GB/T 8890 (BFe30-1-1) — SAC (2017)
- CDA Alloy Datasheet C71500 — Copper Development Association (copper.org) (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Copper-Nickel Alloys: Properties and Applications — Nickel Institute / CDA UK (2020)
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.