Copper Alloy C96300
UNS C96300
C96300 is an intermediate-nickel cast copper-nickel from the C96000 series, sitting between the 90-10 and 70-30 cast grades in both strength and seawater corrosion resistance.
Reference datasheet — C96300 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
C96300 tempers and conditions
C96300 is supplied in 5 conditions, soft to hard. M01 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Stress relieved | Use when machining distortion or residual-stress-driven cracking must be minimized before service. | 250 | 455 | 22 | 130 HB | 7 % IACS |
M01Default As sand cast | Standard as-cast sand casting condition for valve bodies, pump casings and marine fittings. | 275 | 470 | 18 | 140 HB | 6.5 % IACS |
As pressure die cast | For small, near-net-shape marine components where surface finish and dimensional accuracy matter. | 280 | 480 | 18 | 145 HB | 6.5 % IACS |
As continuous cast | Continuous-cast bar/tube stock for machined marine hardware; sound, uniform structure. | 285 | 490 | 20 | 145 HB | 6.5 % IACS |
As centrifugally cast | Pick for tubular/ring shapes needing denser, finer-grained metal and slightly higher strength. | 290 | 500 | 20 | 150 HB | 6.5 % IACS |
What is C96300?
C96300 is an intermediate-nickel cast copper-nickel from the C96000 series, sitting between the 90-10 and 70-30 cast grades in both strength and seawater corrosion resistance. In the default condition it provides 275 MPa yield, 470 MPa tensile, 18% elongation and 140 HB, and is supplied as sand, investment and centrifugal castings with M01, M02, M04, M07 and SR conditions on file. It is a solid-solution alloy, not age-hardenable, so machining is gummy and casting requires clean melt practice and heavy risering. Where higher strength is needed, C96400 or the precipitation-hardening C96600 are the nearest alternatives. C96300 has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,165°C (2,129 °F). C96300 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 145 GPa (21 Msi).
What is C96300 used for?
- marine valve trim
- pump impellers
- industrial seawater fittings
Advantages
- Stiff — 145 GPa (21 Msi), better than 97% of copper alloy grades
- Good corrosion resistance — 78/100, better than 94% of copper alloy grades
- Readily welded — 75/100, better than 89% of copper alloy grades
- High service temperature — 300°C (572 °F), better than 85% of copper alloy grades
Limitations
- High embodied carbon — 6.5 kg CO₂/kg, worse than 94% of copper alloy grades
- Low electrical conductivity — 6.5 % IACS, worse than 91% of copper alloy grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades
- Limited formability — 18/100, worse than 75% of copper alloy grades
C96300 properties
Typical room-temperature values for C96300-M01; bars are the position among copper alloy grades.
Physical3
C96300 has a density of 8.9 g/cm³ (0.322 lb/in³), heavier than 77% of copper alloy grades. It melts at 1,165°C (2,129 °F).
Mechanical15
C96300 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 57% of copper alloy grades. Elongation at break is 18% and the elastic modulus is 145 GPa (21 Msi).
Thermal6
C96300 is rated for continuous service to 300°C (572 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 89% of copper alloy grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
C96300 conducts electricity at 6.5 % IACS, worse than 91% of copper alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of copper alloy grades.
Sustainability4
Producing a kilogram of C96300 takes about 78 MJ of energy and emits 6.5 kg of CO₂ — more than 90% of copper alloy grades. Typical recycled content is 40%.
Manufacturability8
C96300's machinability is poor (28/100, worse than 78% of copper alloy grades); weldability very good (75/100); formability poor (18/100).
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. C96300 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with C96300
Is C96300 easy to machine?
Gummy and work-hardening — use sharp, positive-rake carbide, heavy positive feed, rigid setups and generous coolant; avoid dwelling.
Can C96300 be welded?
Readily GTAW/GMAW welded with 70-30 type Cu-Ni filler (ERCuNi); keep surfaces free of sulfur/oil, use low heat input and no preheat.
Can C96300 be formed, bent or molded?
Cast product only — requires clean, deoxidized melt (Nb/Mn/Si control), high pouring temperature and heavy risering to avoid shrinkage porosity.
C96300 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 |
|---|---|---|
| Niincludes Co | 18 – 22 | 20 |
| Fe | 0.5 – 1.5 | 1 |
| Mn | 0.25 – 1.5 | 0.8 |
| Nbcolumbium, strengthener/deoxidizer | 0.5 – 1.5 | 1 |
| Si | ≤ 0.15 | 0.1 |
| C | ≤ 0.15 | 0.05 |
| S | ≤ 0.02 | |
| P | ≤ 0.02 | |
| Pb | ≤ 0.01 | |
| Curemainder, nominally ~76% | balance |
What surface finishes work on C96300?
Not anodizable; pickle/passivate, then leave bare for seawater (self-healing oxide) or apply epoxy/antifouling-compatible coatings; polishes to a bright, tarnish-resistant finish.
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).
How much does C96300 cost?
C96300 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.
C96300 — frequently asked
What is C96300 used for?
C96300 is typically used for marine valve trim, pump impellers and industrial seawater fittings. In short: mid-nickel cast Cu-Ni; weldable seawater castings; between 90-10 and 70-30.
What is the yield strength of C96300?
C96300 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 470 MPa (68.2 ksi) — stronger than 57% of copper alloy grades. Strength varies by condition: see the 5 listed tempers.
Is C96300 easy to machine?
Not especially — machinability is rated poor (28/100, worse than 78% of copper alloy grades). Gummy and work-hardening — use sharp, positive-rake carbide, heavy positive feed, rigid setups and generous coolant; avoid dwelling.
Can C96300 be welded?
Yes — weldability is rated very good (75/100). Readily GTAW/GMAW welded with 70-30 type Cu-Ni filler (ERCuNi); keep surfaces free of sulfur/oil, use low heat input and no preheat.
What surface finishes work on C96300?
Not anodizable; pickle/passivate, then leave bare for seawater (self-healing oxide) or apply epoxy/antifouling-compatible coatings; polishes to a bright, tarnish-resistant finish.
Can C96300 be formed, bent or molded?
Cast product only — requires clean, deoxidized melt (Nb/Mn/Si control), high pouring temperature and heavy risering to avoid shrinkage porosity.
What is the maximum service temperature of C96300?
C96300 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between C96300-M01 and C96300-SR?
M01 is the default condition — standard as-cast sand casting condition for valve bodies, pump casings and marine fittings. SR: use when machining distortion or residual-stress-driven cracking must be minimized before service. Yield strength is 275 MPa in M01 versus 250 MPa in SR.
How much does C96300 cost?
C96300 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 B369 — Copper-Nickel Alloy Castings — ASTM International (2021)
- CDA Alloy Database — Cast Copper-Nickel Alloys (C96xxx) — Copper Development Association (2023)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Guide to the Use of Copper-Nickel Alloys in Marine Service — Nickel Institute / CDA (2018)
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.