Optimizing Performance with Low Expansion Alloys 4J32 and 4J36
Product Overview
4J32 and 4J36 are precision low expansion iron-nickel alloys renowned for their minimal thermal expansion characteristics over a range of ambient temperatures. Compliant with Chinese Standard YB/T 5241-2005, these alloys are specifically engineered for applications requiring dimensional stability and high precision under varying temperature conditions.
Key Advantages
Exceptional Thermal Stability
Exhibits extremely low coefficient of thermal expansion within ambient temperature ranges.
Maintains dimensional integrity in environments subject to temperature fluctuations.
High Precision Manufacturing
Ideal for manufacturing precision instruments where minimal dimensional change is critical.
Suitable for length standards and thermostatic components requiring reliable performance.
Material Versatility
Available in two optimized grades: 4J32 with cobalt addition for enhanced properties, and 4J36 as a nickel-iron binary variant.
Both grades offer excellent machinability and fabrication characteristics.
Chemical Composition (%)
Grade | C ≤ | Si ≤ | P ≤ | S ≤ | Cu | Se | Mn | Ni | Co | Fe |
4J32 | 0.05 | 0.2 | 0.02 | 0.02 | 0.40-0.80 | - | 0.20-0.60 | 31.5-33.0 | 3.20-4.20 | Bal. |
4J36 | 0.05 | 0.3 | 0.02 | 0.02 | - | - | 0.20-0.60 | 35.0-37.0 | - | Bal. |
Performance Characteristics
Thermal Expansion: Ultra-low expansion coefficient ensures dimensional stability
Machinability: Excellent machining properties allow for precise manufacturing
Reliability: Consistent performance across temperature variations
Typical Applications
Length standards and measurement instruments
Thermostatic rods and bimetallic components
Precision instrument parts requiring dimensional stability
Optical and electronic devices sensitive to thermal expansion
Why Choose 4J32/4J36 Alloys?
Proven Performance: Extensive track record in precision instrumentation
Material Consistency: Strict composition control ensures batch-to-batch reliability
Technical Compliance: Meets YB/T 5241-2005 standard requirements
Application Expertise: Supported by comprehensive technical data and manufacturing experience
Conclusion
4J32 and 4J36 low expansion alloys provide optimized solutions for applications demanding exceptional dimensional stability under temperature variations. Their unique thermal properties and manufacturing characteristics make them indispensable materials for precision instrumentation and thermostatic applications. By selecting the appropriate grade based on specific requirements, engineers can achieve enhanced performance and reliability in precision equipment design.