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:

ElementoC95800 (%)C63200 (%)C95500 (%)Impact on Properties
Cobre79.0-82.081.0-83.078.0-82.0Base metal matrix
Alumínio (Al)8.5-9.58.5-9.58.2-9.5Strength enhancement
Níquel (Ni)4.0-5.04.0-4.83.0-5.5Resistência à corrosão
Ferro (Fe)3.5-4.53.5-4.33.5-4.5Grain refinement
Manganês (Mn)0.8-1.51,2-2,00.8-1.5Deoxidation

1.2 Trace Elements Control

ElementoC95800C63200C95500Critical Control
Silício (Si)0.100.100.10Fluidity control
Chumbo (Pb)0.030.020.03Toxicity limit
Zinco (Zn)0.200.200.20Corrosion control
Outros Total0.500.500.50Quality control

2. Propriedades Mecânicas

2.1 Room Temperature Properties

PropriedadeC95800C63200C95500Test Standard
Resistência à tração (MPa)585-760640-720650-790ASTM E8
Força de rendimento (MPa)270-380280-380280-450ASTM E8
Alongamento (%)15 min15 min15 minASTM E8
Dureza (Brinell)160-190160-200170-210ASTM E10
Impact Strength (J)343434ASTM E23

2.2 Elevated Temperature Properties

Temperatura (°C)PropriedadeC95800C63200C95500
100Resistência à tração (MPa)550650680
100Força de rendimento (MPa)250310330
200Resistência à tração (MPa)480600630
300Resistência à tração (MPa)410520550

3. Physical Properties

3.1 Basic Physical Properties

PropriedadeC95800C63200C95500Units
Densidade7.647h457.58g/cm³
Intervalo de fusão1040-10801030-10601045-1080°C
Condutividade térmica384245W/m·K
Resistividade elétrica13.513.312.8μΩ·cm
Módulos de elasticidade115110113GPa

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

AmbienteC95800 (mm/year)C63200 (mm/year)C95500 (mm/year)
Água do mar00,02500,02500,025
Fresh Water0.0130.0130.013
3% NaCl0.0280.0280.028
Atmosfera Industrial0.0080.0080.008

4.2 Environmental Resistance Ratings (1-10 Scale)

AmbienteC95800C63200C95500Notas
Marinho999All excellent
Processamento Químico878C95800/C95500 preferred
High Temperature788C63200/C95500 preferred
Erosion988C95800 superior
Cavitation878C95800/C95500 better

5. Application Suitability

5.1 Industry-Specific Applications

IndústriaC95800C63200C95500Best Choice
Marine PropulsionExcelenteBomExcelenteC95800/C95500
Processamento QuímicoMuito bomBomExcelenteC95500
Oil & GasExcelenteMuito bomExcelenteC95800/C95500
Geração de energiaMuito bomExcelenteExcelenteC95500
MineraçãoBomMuito bomExcelenteC95500

5.2 Service Condition Ratings

Service ConditionC95800C63200C95500Comments
High Pressure8/109/109/10All suitable
High Temperature7/108/109/10C95500 best
Mídia Corrosiva9/108/109/10C95800/C95500
Resistência ao desgaste8/107/108/10C95800/C95500

6. Manufacturing Considerations

6.1 Processing Parameters

ProcessoC95800C63200C95500Notas
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
Classificação de usinabilidade403538(% of C36000)

6.2 Welding Characteristics

Welding ProcessC95800C63200C95500Filler Metal
GTAWExcelenteMuito bomExcelenteERCuNiAl
GMAWMuito bomBomMuito bomERCuNiAl
SMAWBomBomBomECuNiAl

7. Selection Guidelines

7.1 Primary Selection Criteria

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

7.2 Application-Specific Recommendations

  1. Aplicações marítimas
  • First choice: C95800 for best overall corrosion and erosion resistance
  • Alternative: C95500 when higher strength is required
  • Consider C63200 for cost-sensitive applications
  1. Processamento Químico
  • 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

Conclusão

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