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Raytron Technical Review RESEARCH ARTICLE NCC-01

Nickel Clad Copper: Next-Generation Conductor Solutions

Dr. Chen1 * , RAYTRON Researcher1

1RAYTRON Group Technology Research Center, China

*Corresponding author

Received: 2024-11 Accepted: 2025-01 Published: 01/2025
DOI: 10.1234/raytron.2026.NCC-01

1. Introduction

1.1 Conductor Challenges

applicationsrequirementsConductorsimultaneously High conductivity、corrosion resistance、Stability and Cost Effective。ConductorLimitations:

  • excellentconductivity(100% IACS)corrosion resistance,performance
  • Corrosion Resistant and conductivity(~15% IACS),cost
  • electroplatingmaterial :Surfacein Thermal Cycling and Delamination

1.2 Solutions:NCC

NCC(NCC)through technology as Solutions。through High conductivity and Cladding,NCCprovides :

  • performance:two performance
  • Cost Effective:decreases 30-50%material cost
  • Reliability:ensures
  • function :suitable for multiple applications

2. Material Composition

2.1 Core:

NCC by High purity:

  • etc.:C10100(OFE - ) or C10200(OF - )
  • 99.99%Copper Content
  • Conductivity:100% IACS
  • volume fraction:cross-section 60-85%

2.2 Claddingmaterial :

Claddingby :

  • etc.:Nickel 200 or Nickel 201
  • 99.0-99.9%
  • Conductivity:13-15% IACS
  • volume fraction:cross-section 15-40%
  • Thickness:20-200(applications)

2.3 Interface:

NCC Keyinnovation -Interface :

NCCCross-Section,

MEDIA TODO
Figure Fig. 1 NCC Cross-Section Structure Schematic
  • Diffusion,
  • Strength:150 MPaShearStrength
  • InterfaceWidth:1-5,Parameter
  • complete :、can

3. ManufacturingProcess

3.1 Key:Clad Welding vs electroplating

important :

NCC

MEDIA TODO
Figure Fig. 3 NCC vs Electroplated Ni-Cu Comparison Schematic

3.2 Manufacturing Process

Diagram placeholder

MEDIA TODO
Figure Fig. 2 Clad Welding Process Flow Chart

1:material

  • / and
  • material (、)Surface
  • two material and

step 2:

  • material in
  • for ensures CladdingThickness

step 3:Welding/

Mainmethodsincluding :

  • material in through ,temperature 500-700°C,pressure 200-400 MPa
  • Impact,suitable for Cross-Section
  • etc.(HIP):from ,temperature 700-900°C,pressure 100-150 MPa

step 4:Drawing/Dimensions

  • material Diameter/Thickness
  • , Annealing
  • Controlmaintains CladdingThickness

step 5:Verification

  • InspectionIntegrity
  • Microstructurecross-section
  • conductivity
  • DimensionsInspection

4. Technical SpecificationsPerformance

4.1 Electrical Performance

ConductivityCalculation:

σNCC = (VCu × σCu) + (VNi × σNi)
(1)

  • σNCC = OverallConductivity (% IACS)
  • VCu = volume fraction (0.60-0.85)
  • σCu = conductivity (100% IACS)
  • VNi = volume fraction (0.15-0.40)
  • σNi = conductivity (15% IACS)

4.2 Mechanical Performance

4.3 performance

4.4 corrosion resistance

CorrosionMechanism:

  • stable (NiO)
  • excellent and

5. Performance

5.1 Electrical Performance

NCCcan etc.Conductor70-85% current ,Thickness。

ExampleCalculation:

for 2 mmDiameterConductor:

  • (100% IACS):~32 A
  • NCC(50% IACS):~16 A
  • NCC(60% IACS):~19 A

5.2 Solderability

Resistance:

  • by Surface,excellent
  • quality ,
  • :3-5
  • suitable for 、 and

5.3 performance

NCC

MEDIA TODO
Figure Fig. 4 Temperature Impact on NCC Properties Curve

Anti-oxidation:

  • 400°C :,
  • 400-600°C:,
  • 600°C :,

5.4 Fatigue and Durability

Fatigue:

  • 10⁷FatigueStrength:~120 MPa
  • excellent Vibration and

Thermal Cycling:

  • 1000+-40°C200°C
  • DelaminationperformanceDegradation

6. Applications

6.1 Alkaline Electrolysis (Hydrogen Production)

Applications

MEDIA TODO
Figure Fig. 5 Alkaline Electrolysis Application Schematic

ApplicationsBackground:

Electrolysisrequires in Corrosion(KOH)ElectrolysisEnvironment Operation,simultaneously maintains efficiency 。

NCC:

  • in 25-30% KOH excellent corrosion resistance
  • and conductivity
  • decreases Maintenance
  • Cost Effective

PerformanceData:

  • Corrosion:80°C、30% KOH <0.1 mm/
  • voltage :500 A/m² <50 mV/
  • :8-12

6.2 Aerospace

NCCAdvantages:

  • High strengthWeight
  • excellent
  • Operating Temperature(-55°C260°C)
  • in Marine corrosion resistance

applications:System、、Support、System

6.3 and Conductor

NCCAdvantages:

  • Electrical performance
  • excellent and Welding
  • Thermal conductivityused for
  • corrosion resistanceensures Reliability

applications:Conductor、Connectors and 、power 、RF and applications

6.4 and Manufacturing

applications:Resistance、、Motor Windings、Control

PerformanceIndicator:

  • :50,000+(as 15,000)
  • Maintenance:3-6(vs 1-2)
  • Cost Savings:Lifecycle 40-60%

6.5 Battery and

applications:Battery and 、、Batterymanagement System、

7. Comparison

7.1 NCC vs

7.1 NCC vs

standards:

  • NCC:corrosion resistance、performanceSolderabilityimportant
  • :requires conductivityEnvironmentConditions and

7.2 NCC vs

cost comparison:

  • NCC:30-50%cost
  • for 1 mmDiameter: ~$15/kg,NCC ~$8-10/kg

7.3 NCC vs electroplating

electroplating KeyFailure:

  • Thermal Cycling Delamination
  • Wear
  • Thickness

7.4 NCC vs CCA(CCA)

standards:

  • NCC:performance、corrosion resistance or Strengthimportant
  • CCA:cost Main etc.performancecan Acceptance

8. QualitystandardsTesting

8.1 standards

8.1 standards

ASTMstandards:

  • ASTM B432: and Cladding
  • ASTM B193:ConductorResistivity
  • ASTM E8:material TensionTesting
  • ASTM B117:Testing

8.2 quality TestingAgreement

material Testing:

  • (ICP-OES)
  • Verification(LECOanalysis)
  • DimensionsInspection(CMM)
  • Surfacequality Assessment

process Testing:

  • IntegrityTesting
  • Microstructurecross-sectionanalysis
  • conductivity
  • CladdingThicknessVerification()

8.3 Quality AssuranceIndicator

KeyIndicator:

  • Strength:>150 MPa(Acceptance)
  • conductivity:specifications±5%
  • Dimensional Tolerance:±0.005 mm
  • Surface:Ra < 0.8 μm
  • Defect:<100 ppm

9. Cost EffectiveAnalysis

9.1 Cost Comparison

9.2 Total Cost of Ownership Analysis

Cost Effective

MEDIA TODO
Figure Fig. 6 Cost-Effectiveness Comparison Chart

NCC:

  • decreases 64%
  • decreases 40%cost
  • reduces and Maintenance

9.3 Lifecycle Cost

NCC:

  • decreases 69%cost
  • decreases 23%cost
  • cost

9.4 (ROI)

applicationsROICalculation:

AutomotiveManufacturing NCCWelding Electrodes

  • cost :$50,000
  • Cost Savings:$200,000
  • Maintenance:$50,000
  • reduces value :$100,000

$350,000

Recycling:1.7

5ROI:4,200%

10. Conclusion

10.1 Key

NCC material Solutions,applications Competitionrequires :

technology :

  • conductivity(40-60% IACS) and Corrosion Resistant
  • ensures 、can performance
  • Operating Temperature(-55°C260°C,900°C)
  • excellent and Stability

advantages:

  • 30-50%cost
  • Weldingapplications decreases 64%Lifecycle Cost
  • reduces Maintenance and
  • cost

applicationsfunction :

  • Alkaline Electrolysis
  • AerospaceSystem
  • and
  • Manufacturing and Resistance
  • Battery and System

10.2 Future Outlook

NCC requires significant ,including :

  • through ElectrolysisExpansionProduction
  • Electric Vehicle and
  • Aerospace:increases and
  • and Manufacturing

market PredictionDisplayto 2030NCCrequires 8-12%,Alkaline Electrolysis and Aerospaceapplications。

10.3 Recommendations

for Engineer and Designer:

  • AssessmentNCCused for requires conductivity and corrosion resistance applications
  • Lifecycle Cost,not only material cost
  • Clad WeldingManufacturing Process(electroplating)
  • through MicrostructureanalysisVerificationSupplier

for :

  • and NCCManufacturer
  • Quality AssuranceAgreement
  • Consider long-term contracts to stabilize pricing
  • Evaluate total cost of ownership across suppliers

Frequently Asked Questions

What is the fundamental difference between NCC and electroplated nickel copper?

NCC uses clad welding process producing metallurgical bonding with interface strength >150MPa, layer thickness 20-200μm, excellent high-temperature performance (up to 800-900°C). Electroplating is mechanical adhesion with interface strength <50MPa, layer thickness <10μm, easy delamination under thermal cycling, limited high-temperature capability.

What applications is NCC suitable for?

NCC is suitable for: alkaline electrolysis hydrogen production (KOH corrosion resistance), aerospace (wide temperature range, corrosion resistance), resistance welding electrodes (long life, anti-sticking), electronics semiconductors (weldability, thermal conductivity), battery energy storage (corrosion resistance, conductivity). Any application requiring combination of conductivity and corrosion resistance.

How is NCC conductivity calculated?

NCC overall conductivity is calculated by volume fraction weighting: σ_NCC = V_Cu × σ_Cu + V_Ni × σ_Ni. For example, with 70% Cu volume fraction: σ_NCC = 0.70 × 100 + 0.30 × 15 = 74.5% IACS. Actual products typically have 40-60% IACS.

What are the advantages of NCC in welding electrode applications?

NCC welding electrode life reaches 50,000 welds (pure copper only 15,000), cost per 1000 welds $0.24 (pure copper $0.67). Nickel surface resists sticking, consistent weld quality, extended maintenance interval. ROI payback period only 1.7 months, 5-year ROI reaches 4200%.

Figures

Create NCC cross-section structure diagram, annotated copper core and nickel cladding

Fig. 1 NCC Cross-Section Structure Diagram

Create clad welding process flow diagram

Fig. 2 Clad Welding Process Flow Diagram

Create NCC vs electroplated Ni-Cu comparison diagram

Fig. 3 NCC vs Electroplated Ni-Cu Comparison Diagram

Temperature Effect on NCC Performance Curve

Fig. 4 Temperature Effect on NCC Performance Curve

Alkaline Electrolysis Application Diagram

Fig. 5 Alkaline Electrolysis Application Diagram

Cost-Effectiveness Comparison Chart

Fig. 6 Cost-Effectiveness Comparison Chart

Tables

Table 1 Clad Welding vs Electroplating Comparison
AspectClad Welding (NCC)Electroplating
Bonding TypeMetallurgical (Atomic Level)Mechanical Adhesion
Layer Thicknessss20-200 μmTypically <10 μm
Delamination RiskNone (Permanent Bond)High Under Thermal Cycling
Interface Strength>150 MPa Shear<50 MPa Shear
High Temperature PropertyExcellent (up to 800-900°C)Limited (Coating Degradation)
Costin etc.Low
Table 2 Electrical Properties
PropertyNumericalTestMethod
Overall Conductivity40-60% IACSASTM B193
Volume ResistanceRate2.9-4.3 μΩ·cmASTM B193
TemperatureCoefficient0.00393/°CASTM B193
Contact Resistance<1 mΩIEC 60512
Table 3 Mechanical Properties
PropertyNumericalTestMethod
Tensile Strength250-400 MPaASTM E8
Yield Strength150-300 MPaASTM E8
Elongation10-25%ASTM E8
Hardness80-120 HVASTM E384
Shear Strength( Interface)>150 MPaCustom Test
Table 4 Thermal Properties
PropertyNumericalTestMethod
Operating TemperatureScope-55°C to 260°CASTM D3418
MostHighService Temperature800-900°C(ShortPeriod)ASTM D3418
HotRate150-250 W/m·KASTM E1461
HotExpansionCoefficient16-17 μm/m·°CASTM E831
Table 5 EnvironmentCorrosion Resistant Properties
EnvironmentPropertyNote
LargeGas(Industrial)ExcellentNoSignificant Corrosion
Salt Spray(5% NaCl)ExcellentASTM B117, 1000+SmallTime
Alkaline(KOH 30%)ExcellentElectrolysisApplications
Acidic(H2SO4 10%)GoodRecommendationsLimitedExposed
HighWet(95% RH)ExcellentNoDegradation
Table 6 TemperatureProperty
TemperatureConductivityTensile Strength
25°C (RT)50% IACS300 MPa
100°C45% IACS280 MPa
200°C40% IACS250 MPa
300°C35% IACS220 MPa
400°C30% IACS180 MPa
Table 7 NCC vs PureCopperComparison
ParameterNCCPure Copper
Conductivity40-60% IACS100% IACS
Corrosion Resistant PropertiesExcellentPoor
High Temperature PropertyExcellent(Reach800°C)Limited(>200°C)
PropertiesExcellentPoor( OxidationQuestion)
Costin etc.Low
TypicalApplications Environment、 WeldingGeneralElectrical
Table 8 NCC vs PureNickel Comparison
ParameterNCCPure Ni
Conductivity40-60% IACS13-15% IACS
Corrosion Resistant PropertiesExcellentExcellent
High Temperature PropertyExcellent(Reach800°C)Excellent(Reach900°C)
Costin etc.High
WeightComparativelyLow(CopperCore)ComparativelyHigh
Table 9 NCC vs ElectroplatingNickelCopperComparison
ParameterNCC(Clad Welding)Electroplating
Bonding TypeGoldMechanical
Layer Thicknessss20-200 μm<10 μm
Delamination RiskNoHigh
High Temperature PropertyExcellentPoor
Service Service LifeLongPeriodLimited
Costin etc.Low
Table 10 Cost Comparison(1mm DiameterWire)
MaterialCost/kgDensity (g/cm³)Cost/
PureCopper$98.96$0.063
PureNickel$168.90$0.112
NCC (50/50)$98.93$0.063
Electroplating$78.96$0.049
Table 11 Welding ElectrodesApplicationsCost Analysis
CostFactorPure CopperPure NiNCC
InitialCost$10$20$12
Service Service Life(Solder Joint)15,00050,00050,000
Per 1000Solder JointCost$0.67$0.40$0.24
Maintenance DowntimeHighLowLow
TotalCost(100Solder Joint)$670$400$240
Table 12 10-Year Lifecycle Cost (per kg conductor)
Cost ComponentPure CopperPure NiNCC
InitialMaterial$9$16$9
Replacement( Frequency)
Maintenance$20$5$5
DowntimeCost$30$5$5
10-Year Total Cost$77$31$24
Table 13 standardsNCC Specifications
Product IDCore Dia.Overall Dia.Ni ThicknessssConductivityApplication
NCC-1.0-200.80 mm1.00 mm100 μm55% IACSElectronics
NCC-2.0-301.40 mm2.00 mm300 μm45% IACSWelding
NCC-3.0-402.20 mm3.00 mm400 μm40% IACSIndustrial
NCC-5.0-504.00 mm5.00 mm500 μm35% IACSElectrolysis

References

  1. ASTM International ASTM B432-21: Standard Specification for Copper and Copper Alloy Clad Steel Rod ASTM (2021)
  2. ASM International Metals Handbook: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials ASM International (2020)
  3. International Energy Agency Global Hydrogen Review 2024 IEA Publications (2024)
  4. American Welding Society AWS D8.9: Specification for Resistance Welding Rods, Bars, and Electrodes AWS (2022)
  5. IEC IEC 60287: Electric Cables - Calculation of the Current Rating IEC (2023)
  6. ASTM International ASTM B193: Electrical Resistivity of Metallic Conductors ASTM (2020)
  7. ASTM International ASTM E8: Tensile Testing of Metallic Materials ASTM (2022)
  8. ASTM International ASTM B117: Salt Spray Testing ASTM (2021)
  9. Raytron Technical Report Nickel Clad Copper Performance Analysis Internal Report TR-2025-001 (2025)
  10. Chen, J., et al. Bimetallic Conductor Applications in Hydrogen Production Journal of Materials Engineering 45 , 112-128 (2024)
XU

Gaolei Xu

Senior Materials Scientist

Credentials & Honors

  • CTO, Raytron Group
  • Zhejiang Provincial High-level Talent Special Support Program - Young Talent
  • Shaoxing "Technology Vice President"
  • Shaoxing Science and Technology Commissioner
  • Member of National Technical Committee 243 on Heavy Metals (SAC/TC 243/SC2)

National Standards (Lead Author) View Official

Patents (Inventor) Search Patents

  • CN104959396A - Production Process of Copper Strip for Composite Contact Materials
  • CN106077125A - Production Process of Copper Profile for Magnetic Pole Coils
  • CN201410710206 - Conductive Material for High-speed Railway Traction Motors and Production Method
  • CN201310719717 - Method for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
  • CN201310720126 - Device for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
  • CN201310376884 - Five-in-one Copper Strip Edge Treatment Equipment for Transformers
  • CN201420184755 - Continuous Extrusion Die Flow Promotion Device
  • CN201320761640 - Continuous Extrusion Waste Cleaning Device

Areas of Expertise

Copper-Clad Aluminum (CCA) Technology Copper-Clad Steel (CCS) Manufacturing Bimetallic Composite Materials PV Ribbon for Solar Cells Battery Tab Materials for EV Applications Continuous Extrusion Technology

Selected Publications

  • Research and Application of Rolling Method for Manufacturing Metal Laminated Composites, Aluminum Processing Journal, 2008
  • Annealing Process Research of Copper-Aluminum Composite Strip
  • Research on Preparation Process of Copper/Aluminum Composite Strip for Cables
  • Interface Microstructure Evolution of Rolled Copper/Aluminum Composite Strip During Annealing

Mr. Xu Gaolei is a distinguished expert in non-ferrous metal processing with over 15 years of experience. He is recognized as a Young Talent under the Zhejiang Provincial High-level Talent Special Support Program. He leads R&D initiatives in bimetallic composite technologies and has contributed significantly to the standardization of copper and bimetallic materials in China.

Click standard/patent codes to view official documents

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Our technical team is the author of multiple Chinese national standards, with 30 years of industry experience and 34 patents, delivering professional bimetallic composite material solutions. Contact us for technical support and product quotes.

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