C70600 Copper-Nickel 90/10
Primary Designation:UNS C70600
Aliases:
Copper-Nickel 90/10Cupronickel 90-10C70600
Mat Grades internal verification confirms source-backed fidelity and data integrity. It does not constitute external certification, ASTM/CDA endorsement, or guaranteed material conformity for procurement.
Data Completeness & Record Integrity:6 composition elements and 41 contextual property values cataloged.
Omitted fields represent unverified parameters. "Missing is better than invented."
Key Engineering Properties
Representative source rows, qualified by their reported conditions. Inspect the tables below for all values, limits, and source notes.
Density
8.941 g/cm³TYPICAL · at 20 °C
Electrical Conductivity
9 % IACSTYPICAL · at 20 °C
Thermal Conductivity
45 W/(m·K)TYPICAL · at 20 °C
Specific Heat Capacity
376.8 J/(kg·K)TYPICAL · at 20 °C
Melting Range (Solidus / Liquidus)
1098.9 – 1148.9 °C2010.0 – 2100.0 °F
Solidus: 1098.9°C | Liquidus: 1148.9°CComposition Excerpt
Cu BALANCE wt%Copper (balance)
Standard Elemental Basis: BALANCEEngineering Summary
UNS C70600 Copper-Nickel (90Cu-10Ni with 1.0-1.8% Fe) is the premier marine engineering alloy for seawater piping, condenser tubes, offshore oil platform cladding, and ship hulls. It provides outstanding inherent resistance to marine biofouling, velocity-resilient impingement corrosion resistance, and excellent butt-welding and brazing characteristics.
Documented Product Applications (Cited CDA Reference Profile)
- ›Automotive: Brake Lines
- ›Boat Hulls: Corrosion Resistance
- ›Boat Hulls: Fouling Resistance
- ›Boat Hulls: Mechanical Properties
- ›Brake Lines: Machining Characteristics
- ›Brake Lines: Mechanical Properties
- ›Condenser Plates: Corrosion Resistance
- ›Condenser Plates: Mechanical Properties
- ›Condensers: Corrosion Resistance
- ›Condensers: Mechanical Properties
- ›Consumer: Screw Lamp Bases
- ›Distiller Tubes: Corrosion Resistance
Recognized Aliases
Source-backed commercial trade name and short designations cataloged in canonical data.
Copper-Nickel 90/10Cupronickel 90-10C70600
Standard Designations & Applicable Specifications
Semantically classified designations distinguishing primary standard identifiers, commercial trade names, and applicable specification references.
Direct Standard DesignationsDIRECT DESIGNATION
2 Primary Identifiers| System | Identifier | Standard System Name | Classification Notes & Provenance |
|---|---|---|---|
| UNSPRIMARY | C70600 | Unified Numbering System | Unified Numbering System standard designation for copper alloys (CDA / SAE / ASTM)Ref: CDA UNS Standard Designations Register (C70600) |
| CDA | Alloy 706 | Copper Development Association Alloy Number | CDA three-digit legacy designationRef: CDA UNS Standard Designations Register (C70600) |
Recognized Commercial Aliases & Trade NamesCOMMON ALIAS
4 Listed| Recognized Name / Alias | Classification | Technical Usage & Context |
|---|---|---|
| 90/10 Cupronickel | Standard Commercial Name | CDA Standard Commercial Name |
| Copper-Nickel 90/10 | Commercial Alias | Colloquial or commercial industry synonym |
| Cupronickel 90-10 | Commercial Alias | Colloquial or commercial industry synonym |
| C70600 | Commercial Alias | Colloquial or commercial industry synonym |
Applicable Specifications & Product Form ReferencesSPECIFICATION REFERENCE
12 Applicable Standards| Standards Body | Specification Code | Specification Title / Scope | Relationship Type |
|---|---|---|---|
| ASTM | ASTM B122/B122M | COPPER-NICKEL-ZINC ALLOY (NICKEL-SILVER) AND COPPER-NICKEL PLATE, SHEET, STRIP, AND ROLLED BAR | Specification Reference |
| ASTM | ASTM B151/B151M | COPPER-NICKEL-ZINC ALLOY (NICKEL-SILVER) AND COPPER-NICKEL ROD AND BAR | Specification Reference |
| MILITARY | MILITARY MIL-C-15726 | COPPER-NICKEL ALLOY ROD, FLAT PRODUCTS (FLAT WIRE, STRIP, SHEET, BAR, AND PLATE) AND FORGINGS | Specification Reference |
| ASTM | ASTM B956/B956M | WELDED COPPER AND COPPER-ALLOY CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS | Specification Reference |
| ASTM | ASTM B466/B466M | SEAMLESS COPPER-NICKEL PIPE AND TUBE | Specification Reference |
| ASTM | ASTM B467 | WELDED COPPER-NICKEL PIPE | Specification Reference |
| ASME | ASME SB467 | WELDED COPPER-NICKEL PIPE | Specification Reference |
| ASME | ASME SB466 | SEAMLESS COPPER-NICKEL PIPE AND TUBE | Specification Reference |
| ASTM | ASTM B432 | COPPER AND COPPER ALLOY CLAD STEEL PLATE | Specification Reference |
| ASME | ASME SB171 | COPPER ALLOY CONDENSER TUBE PLATES | Specification Reference |
| SAE | SAE J463 | WROUGHT COPPER AND COPPER ALLOYS | Specification Reference |
| SAE | SAE J461 | WROUGHT AND CAST COPPER ALLOYS | Specification Reference |
Engineering Notice: Applicable specifications establish manufacturing requirements, dimensional tolerances, and test criteria for specific product forms (e.g. bus bar, wire, plate, pipe). They represent applicable technical standards, not alternative or equivalent alloy grades.
Chemical Composition (Weight %)
Elemental limits and values from the cited source. Preserves exact semantic limits (minimums, maximums, and ranges).
| Element | Symbol | Atomic No. | Semantic Basis | Specified Value | Unit | Metallurgical Notes & Qualification | Data Status |
|---|---|---|---|---|---|---|---|
| Copper | Cu | 29 | BALANCE | Balance | wt% | Remainder element (Copper).Ref: Copper Development Association (CDA) | VERIFIED |
| Lead | Pb | 82 | MAXIMUM | ≤ 0.05 | wt% | CDA chemical composition specification limits for C70600: max 0.05 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Zinc | Zn | 30 | MAXIMUM | ≤ 1.00 | wt% | CDA chemical composition specification limits for C70600: max 1.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Iron | Fe | 26 | RANGE | 1.00 – 1.80 | wt% | CDA chemical composition specification limits for C70600: 1.0 - 1.8 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Nickel | Ni | 28 | RANGE | 9.00 – 11.00 | wt% | CDA chemical composition specification limits for C70600: 9.0 - 11.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
| Manganese | Mn | 25 | MAXIMUM | ≤ 1.00 | wt% | CDA chemical composition specification limits for C70600: max 1.0 wt%.Ref: Copper Development Association (CDA) | VERIFIED |
* Elemental percentages are expressed in weight percent (wt%). Values represent applicable specification limits. Unspecified trace elements are not fabricated or assumed.Preserves exact semantic basis
Property Display UnitsSwitch between Canonical SI and Source / US Customary units:
Physical Properties
Source-specific physical properties. Test temperatures are shown only where reported.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Density | 8.941 g/cm³ | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Density 0.323 lb/cu in. at 68°F (8.941 g/cm³ at 20°C) | 0.323 lb/cu in. at 68°F | Copper Development Association Inc. | VERIFIED |
Thermal & Thermodynamic Properties
Phase change temperatures, thermal conductivity, specific heat, mean coefficients of thermal expansion across standardized temperature ranges, and recommended thermal processing windows.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Liquidus Temperature | 1148.9 °C | TYPICAL | CDA Physical Properties: Liquidus temperature 2100.0 °F (1148.9 °C) | 2100.0 °F | Copper Development Association Inc. | VERIFIED |
| Solidus Temperature | 1098.9 °C | TYPICAL | CDA Physical Properties: Solidus temperature 2010.0 °F (1098.9 °C) | 2010.0 °F | Copper Development Association Inc. | VERIFIED |
| Thermal Conductivity | 45 W/(m·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Thermal conductivity 26.0 Btu/(ft·hr·°F) (45.0 W/(m·K) at 20°C) | 26.0 Btu/ sq ft/ ft hr/ °F at 68°F | Copper Development Association Inc. | VERIFIED |
| Coefficient of Thermal Expansion (CTE) | 17.1 µm/(m·K) | TYPICAL | CDA Physical Properties: CTE 9.5 µin/(in·°F) (17.1 µm/(m·K)) over range 68-57210°F | 9.5 10^-6 per °F | Copper Development Association Inc. | VERIFIED |
| Specific Heat Capacity | 376.8 J/(kg·K) | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Specific heat 0.09 Btu/(lb·°F) (376.8 J/(kg·K)) | 0.09 Btu/ lb /°F at 68°F | Copper Development Association Inc. | VERIFIED |
| Annealing Temperature Range | 593.3 – 815.6 °C | RANGE | CDA Thermal Treatments: Annealing temperature range 1100 - 1500°F (593.3 - 815.6°C) | 1100 – 1500 °F | Copper Development Association Inc. | VERIFIED |
| Hot Working Temperature Range | 843.3 – 954.4 °C | RANGE | CDA Thermal Treatments: Hot working range 1550 - 1750°F (843.3 - 954.4°C) | 1550 – 1750 °F | Copper Development Association Inc. | VERIFIED |
Electrical Properties
Electrical conductivity and resistivity in their reported units and conditions.
| Property Parameter | Canonical SI Value | Semantic Basis | Test Temperature / Context Range | Source Raw Reference | Source Reference | Status |
|---|---|---|---|---|---|---|
| Electrical Conductivity | 9 % IACS | TYPICAL | Test Temp: 20 °CCDA Physical Properties: Volume conductivity 9.0 % IACS at 68°F (20°C) | 9.0 % IACS at 68°F | Copper Development Association Inc. | VERIFIED |
Contextual Mechanical Properties & Tempers
Engineering strength, ductility, and hardness values grouped by product form, temper, and section thickness. Mechanical properties are contextual and not isotropic averages.
Elastic & Baseline Mechanical ConstantsSource-specific measurement conditions
Modulus of Elasticity (Tension)
124.1 GPa
CDA Physical Properties: Elastic modulus in tension 18000.0 ksi (124.1 GPa)Modulus of Rigidity
46884.3 MPa
CDA Physical Properties: Shear modulus 6800.0 ksi (46884.3 MPa)Machinability Rating
20 %
CDA Fabrication Properties: Rating relative to Free-Cutting Brass (C36000 = 100%).Showing 12 of 12 conditions
| Product Form | Temper / Condition | Section Size | Tensile (UTS) | Yield Strength | Elongation | Shear Strength | Fatigue Strength | Hardness (Scales Preserved) | Status |
|---|---|---|---|---|---|---|---|---|---|
| Bar | Hard (H04) · 20 °CSource values and qualifiersTensile Strength: 344.7 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 172.4 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 15 % (TYPICAL)Copper Development Association (CDA) — | — | 344.7 MPa | 172.4 MPa | 15 % | — | — | — | VERIFIED |
| Bar | Soft Anneal (O60) · 20 °CSource values and qualifiersTensile Strength: 262 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 103.4 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 30 % (TYPICAL)Copper Development Association (CDA) — | — | 262 MPa | 103.4 MPa | 30 % | — | — | — | VERIFIED |
| Flat Products | 1/4 Hard (H01) · 20 °CSource values and qualifiersTensile Strength: 365.4 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 110.3 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 35 % (TYPICAL)Copper Development Association (CDA) — | — | 365.4 MPa | 110.3 MPa | 35 % | — | — | — | VERIFIED |
| Flat Products | 1/4 Hard (H01)Source values and qualifiersRockwell B Hardness: 60 HRB (TYPICAL)Copper Development Association (CDA) — | — | — | — | — | — | — | 60 HRB | VERIFIED |
| Flat Products | As Hot Rolled (M20) · 20 °CSource values and qualifiersTensile Strength: 275.8 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 103.4 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 30 % (TYPICAL)Copper Development Association (CDA) — | — | 275.8 MPa | 103.4 MPa | 30 % | — | — | — | VERIFIED |
| Flat Products | As Hot Rolled (M20)Source values and qualifiersRockwell B Hardness: 3 HRB (TYPICAL)Copper Development Association (CDA) — | — | — | — | — | — | — | 3 HRB | VERIFIED |
| Flat Products | Hard (H04) · 20 °CSource values and qualifiersTensile Strength: 517.1 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 503.3 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 5 % (TYPICAL)Copper Development Association (CDA) — | — | 517.1 MPa | 503.3 MPa | 5 % | — | — | — | VERIFIED |
| Flat Products | Hard (H04)Source values and qualifiersRockwell B Hardness: 80 HRB (TYPICAL)Copper Development Association (CDA) — | — | — | — | — | — | — | 80 HRB | VERIFIED |
| Tube | Annealed (O61) · 20 °CSource values and qualifiersTensile Strength: 303.4 MPa (TYPICAL)Copper Development Association (CDA) — Yield Strength (0.5% Ext): 110.3 MPa (TYPICAL)Yield strength at 0.5% extension under loadCopper Development Association (CDA) — Elongation: 42 % (TYPICAL)Copper Development Association (CDA) — | — | 303.4 MPa | 110.3 MPa | 42 % | — | — | — | VERIFIED |
| Tube | Annealed (O61)Source values and qualifiersRockwell B Hardness: 15 HRB (TYPICAL)Copper Development Association (CDA) — Rockwell F Hardness: 65 HRF (TYPICAL)Copper Development Association (CDA) — Rockwell 30T Hardness: 26 HR30T (TYPICAL)Copper Development Association (CDA) — | — | — | — | — | — | — | 15 HRB65 HRF26 HR30T | VERIFIED |
| Tube | Light Drawn, Light Cold Rolled (H55) · 20 °CSource values and qualifiersTensile Strength: 310.3 MPa (TYPICAL)Copper Development Association (CDA) — Elongation: 10 % (TYPICAL)Copper Development Association (CDA) — | — | 310.3 MPa | — | 10 % | — | — | — | VERIFIED |
| Tube | Light Drawn, Light Cold Rolled (H55)Source values and qualifiersRockwell B Hardness: 72 HRB (TYPICAL)Copper Development Association (CDA) — Rockwell F Hardness: 100 HRF (TYPICAL)Copper Development Association (CDA) — Rockwell 30T Hardness: 70 HR30T (TYPICAL)Copper Development Association (CDA) — | — | — | — | — | — | — | 72 HRB100 HRF70 HR30T | VERIFIED |
Hardness Integrity Notice: Rockwell B (HRB), Rockwell F (HRF), and Superficial 30T (HR30T) scales are reported on their measured scales without cross-scale mathematical conversion.
Source: See fact-level citations
Processing & Fabrication Characteristics
Machining, joining, forming, and thermal processing ratings cataloged from the cited authoritative technical reference.
Machinability
Machinability rating: 20% relative to free-cutting brass (C36000 = 100%).
Weldability & Joining
Soldering: Excellent; Brazing: Excellent; Oxyacetylene Welding: Fair; Gas Shielded Arc Welding: Excellent; Coated Metal Arc Welding: Good; Spot Weld: Good; Seam Weld: Good; Butt Weld: Excellent
Heat Treatment & Working Ranges
Annealing temperature range: 593.3°C to 815.6°C (1100°F - 1500°F). Hot working temperature range: 843.3°C to 954.4°C (1550°F - 1750°F).
Forming & Cold Working
Capacity for Being Cold Worked: Good. Capacity for Being Hot Formed: Good.
Comparable Grades & Cross-References
Carefully classified cross-reference relationships for C70600 Copper-Nickel 90/10. Comparable does not mean equivalent.
| Related Material | Family | Relationship Classification | Metallurgical Notes & Differences | Status | Action |
|---|---|---|---|---|---|
| C71500 Copper-Nickel 70/30 | Copper Alloys | Commonly Compared | C70600 (90/10 Cu-Ni) provides inherent biofouling and seawater corrosion resistance in marine piping systems. C71500 (70/30 Cu-Ni) delivers higher mechanical strength and greater erosion-corrosion resistance in higher-velocity fluid systems.Materials serve different design priorities (e.g. higher strength vs superior corrosion resistance or cost). | VERIFIED | Side-by-Side Compare → |
Sources & Provenance Trail
Reference publications and standards organization registers cited across this material record.
Copper Development Association Inc.CDA Alloy C70600 Property & Specification Profile
AUTHORITATIVE BODY
Copper Development Association authoritative technical reference profile for C70600 Copper-Nickel 90/10.
Issuing Body: Copper Development Association (CDA)View Source Record ↗
Copper Development Association Inc.CDA UNS Standard Designations Register (C70600)
AUTHORITATIVE BODY
Unified Numbering System (UNS) designation registration register confirming active C70600 status.
Issuing Body: Copper Development Association (CDA)View Source Record ↗
Intellectual Property & Provenance Notice: Mat Grades cites technical literature from recognized industry associations and standards organizations. Underlying technical standards and publication data remain the intellectual property of their respective issuing organizations.