A comprehensive comparison guide for Nickel Aluminum Bronze (NAB) tubes – C95800, C63200, and C95500. Detailed analysis of chemical composition, mechanical properties, corrosion resistance, and application-specific recommendations for marine, chemical processing, and industrial uses.

1. Chemical Composition Analysis

1.1 Primary Chemical Composition

The precise control of alloying elements significantly influences mechanical properties, corrosion resistance, and overall performance. Each element serves specific functions in the alloy:

ElementC95800 (%)C63200 (%)C95500 (%)Impact on Properties
Copper (Cu)79.0-82.081.0-83.078.0-82.0Base metal matrix
Aluminum (Al)8.5-9.58.5-9.58.2-9.5Strength enhancement
Nickel (Ni)4.0-5.04.0-4.83.0-5.5Corrosion resistance
Iron (Fe)3.5-4.53.5-4.33.5-4.5Grain refinement
Manganese (Mn)0.8-1.51.2-2.00.8-1.5Deoxidation

1.2 Trace Elements Control

ElementC95800C63200C95500Critical Control
Silicon (Si)0.100.100.10Fluidity control
Lead (Pb)0.030.020.03Toxicity limit
Zinc (Zn)0.200.200.20Corrosion control
Others Total0.500.500.50Quality control

2. Mechanical Properties

2.1 Room Temperature Properties

PropertyC95800C63200C95500Test Standard
Tensile Strength (MPa)585-760640-720650-790ASTM E8
Yield Strength (MPa)270-380280-380280-450ASTM E8
Elongation (%)15 min15 min15 minASTM E8
Hardness (Brinell)160-190160-200170-210ASTM E10
Impact Strength (J)343434ASTM E23

2.2 Elevated Temperature Properties

Temperature (°C)PropertyC95800C63200C95500
100Tensile Strength (MPa)550650680
100Yield Strength (MPa)250310330
200Tensile Strength (MPa)480600630
300Tensile Strength (MPa)410520550

3. Physical Properties

3.1 Basic Physical Properties

PropertyC95800C63200C95500Units
Density7.647.457.58g/cm³
Melting Range1040-10801030-10601045-1080°C
Thermal Conductivity384245W/m·K
Electrical Resistivity13.513.312.8μΩ·cm
Modulus of Elasticity115110113GPa

3.2 Thermal Expansion

Temperature Range (°C)C95800C63200C95500Units
20-10016.216.416.2μm/m·K
20-30017.317.517.3μm/m·K

4. Corrosion Resistance

4.1 Corrosion Rates in Various Environments

EnvironmentC95800 (mm/year)C63200 (mm/year)C95500 (mm/year)
Seawater0.0250.0250.025
Fresh Water0.0130.0130.013
3% NaCl0.0280.0280.028
Industrial Atmosphere0.0080.0080.008

4.2 Environmental Resistance Ratings (1-10 Scale)

EnvironmentC95800C63200C95500Notes
Marine999All excellent
Chemical Processing878C95800/C95500 preferred
High Temperature788C63200/C95500 preferred
Erosion988C95800 superior
Cavitation878C95800/C95500 better

5. Application Suitability

5.1 Industry-Specific Applications

IndustryC95800C63200C95500Best Choice
Marine PropulsionExcellentGoodExcellentC95800/C95500
Chemical ProcessingVery GoodGoodExcellentC95500
Oil & GasExcellentVery GoodExcellentC95800/C95500
Power GenerationVery GoodExcellentExcellentC95500
MiningGoodVery GoodExcellentC95500

5.2 Service Condition Ratings

Service ConditionC95800C63200C95500Comments
High Pressure8/109/109/10All suitable
High Temperature7/108/109/10C95500 best
Corrosive Media9/108/109/10C95800/C95500
Wear Resistance8/107/108/10C95800/C95500

6. Manufacturing Considerations

6.1 Processing Parameters

ProcessC95800C63200C95500Notes
Hot Working Temp (°C)760-870760-870760-870Similar ranges
Annealing Temp (°C)650-750650-750650-750Similar ranges
Stress Relief Temp (°C)350-400350-400350-400Similar ranges
Machinability Rating403538(% of C36000)

6.2 Welding Characteristics

Welding ProcessC95800C63200C95500Filler Metal
GTAWExcellentVery GoodExcellentERCuNiAl
GMAWVery GoodGoodVery GoodERCuNiAl
SMAWGoodGoodGoodECuNiAl

7. Selection Guidelines

7.1 Primary Selection Criteria

RequirementBest ChoiceSecond ChoiceNotes
Highest StrengthC95500C95800For critical applications
Best Corrosion ResistanceC95800C95500Marine environments
Cost EffectivenessC63200C95500Standard applications
High Temperature UseC95500C63200Above 200°C

7.2 Application-Specific Recommendations

  1. Marine Applications
  • First choice: C95800 for best overall corrosion and erosion resistance
  • Alternative: C95500 when higher strength is required
  • Consider C63200 for cost-sensitive applications
  1. Chemical Processing
  • Primary choice: C95500 for high-temperature applications
  • Alternative: C95800 for superior corrosion resistance
  • C63200 suitable for less demanding conditions
  1. General Industrial Use
  • Standard choice: C63200 for good all-around properties
  • Upgrade to C95500 for higher stress applications
  • Consider C95800 when corrosion resistance is critical

Conclusion

Selection Priorities:

  1. Operating environment conditions
  2. Mechanical property requirements
  3. Temperature service conditions
  4. Manufacturing requirements
  5. Cost considerations

Grade Summary:

  • C95800: Optimal for marine and high-erosion environments
  • C95500: Best for high-strength and high-temperature applications
  • C63200: Cost-effective choice for general industrial use