Our 3J21 High-Elasticity Alloy Bar is a top choice for robust spring and diaphragm systems, delivering the elasticity and durability needed for high-performance applications. Whether you’re building components for aerospace or industrial machinery, this alloy bar is engineered to keep things moving smoothly. Let’s explore what makes 3J21 special, its applications, industry trends, and why our company is your top supplier for this high-performance material.
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The 3J21 High-Elasticity Alloy Bar, also known as Elgiloy, is a cobalt-chromium-nickel alloy designed for robust spring and diaphragm systems. Its composition provides superelasticity, high strength, and excellent corrosion resistance. Processed through cold-drawing and heat treatment, this bar offers a high strength-to-weight ratio and performs reliably from -60°C to +200°C. With a low thermal expansion coefficient (10–12 × 10⁻⁶/°C), density of ~8.3 g/cm³, and electrical resistivity of ~1.0 μΩ·m, it’s ideal for demanding mechanical applications.
We provide 3J21 alloy bars in various sizes and can customize compositions to meet your specific requirements, ensuring they’re ready for your spring and diaphragm projects.
| Grades | Density (g/cm³) | Electrical Resistivity (10⁻⁶ Ω·cm) | Thermal Conductivity (W/m·K) | Modulus of Elasticity (GPa) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation at Break (%) | Elastic Limit (MPa) | Fatigue Life (cycles) | Working Temperature Range (°C) | Temperature Coefficient |
| 8.1 | 80 | 11 | 144 | 800 | 1000 | 10 | 800 | >10⁷ | -60 to 200 | Extremely low temperature coefficient of elasticity | |
| 8.3 | 120 | 40 | 125 | 300 | 600 | 20 | 300 | >10⁷ | -40 to 150 | Elasticity remains constant with minimal temperature sensitivity | |
| 8.2 | 100 | 15 | 180 | 1100 | 1400 | 5 | 1100 | >10⁶ | -200 to 500 | Maintains high strength even at elevated temperatures |
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The market for high-elasticity alloys like 3J21 is growing rapidly, driven by demand in aerospace, medical, and industrial sectors. The global specialty alloy market is projected to expand through 2030, fueled by advancements in manufacturing and the need for materials that can handle high-stress conditions. Spring and diaphragm systems are critical in these industries, requiring alloys with exceptional elasticity and durability.
Customization is a key trend—engineers want materials tailored to specific performance needs. Sustainability is also a focus, with industries seeking durable alloys to reduce maintenance costs. The rise of smart manufacturing and advanced aerospace systems is increasing demand for reliable components, where 3J21 excels. Production costs can be a challenge, but our optimized processes keep costs competitive without sacrificing quality.
Applications of 3J21 Alloy Bar
Our 3J21 alloy bar excels in:
Aerospace: Powers robust springs in actuators and sensors for extreme environments.
Industrial Machinery: Supports diaphragms in high-stress equipment.
Medical Devices: Ideal for biocompatible springs in implants like stents.
Automotive: Powers springs in safety and fuel systems.
Precision Engineering: Ensures reliable performance in gauges and balances.
Electronics: Resists arc erosion in relays and switches.
Marine Applications: Performs in corrosive saline environments.
Watchmaking: Ensures precision in timekeeping mechanisms.
These applications highlight why 3J21 is a trusted choice for spring and diaphragm systems.
Company Comparison and Our Advantages
We’re committed to delivering 3J21 alloy bars that outperform in dynamic applications. Here’s why we stand out:
Tailored Solutions: We customize bar size, composition, and finish to fit your needs.
Rigorous Quality Control: ISO and ROHS certified, with COA-backed samples.
Advanced Processing: Our cold-drawing and heat-treatment maximize elasticity.
Low MOQ, Great Pricing: Start with small quantities at factory-direct prices.
Fast Delivery: Ample stock and efficient production ensure quick turnaround.
Expert Support: Our alloy specialists guide you through material selection.
Eco-Friendly Focus: Our durable bars support sustainable designs.
Compared to standard suppliers, our focus on customization, quality, and speed makes us the ideal partner for your projects.
Comparison Parameters Table
Parameter | 3J21 Alloy Bar | Generic Co-Cr-Ni Alloy Bar |
|---|---|---|
Elastic Modulus | Superelastic, stable to +200°C | Moderate, less stable |
Corrosion Resistance | Excellent (acids, saline) | Good, less resistant to acids |
Thermal Expansion Coefficient | Low (10–12 × 10⁻⁶/°C) | Higher, less consistent |
Tensile Strength | Very high (post-treatment) | Moderate, varies by grade |
Processing | Cold-drawn + heat-treated | Basic processing, less refined |
Fatigue Resistance | High | Moderate |
Applications | Spring and diaphragm systems | General components, limited durability |
Customization Options | Extensive (size, composition) | Limited |
Our 3J21 High-Elasticity Alloy Bar is built for robust spring and diaphragm systems that demand reliability. Its superelasticity, corrosion resistance, and customizability make it a top choice for industries where performance is critical. With our commitment to quality and support, you’re getting a product that’s ready to power your success. Let’s make your next project a win with 3J21!
For more details, pls directly contact us.
About Us:
Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications.
For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.
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FAQs:
What is 3J21 High-Elasticity Alloy Bar used for?
Ideal for robust spring and diaphragm systems in aerospace, medical, and industrial applications.What are the key properties of 3J21 Alloy Bar?
Superelasticity, high strength, excellent corrosion resistance, and stability up to +200°C.Which industries benefit from 3J21 Alloy Bar?
Aerospace, medical devices, industrial machinery, and automotive.How does 3J21 perform in harsh environments?
It resists corrosion from acids and saline conditions, ensuring durability in tough settings.Can 3J21 Alloy Bar be customized?
Yes, we offer custom sizes, compositions, and finishes to meet your project needs.Why is 3J21 ideal for spring and diaphragm systems?
Its high elasticity and fatigue resistance ensure reliable performance in dynamic applications.How is 3J21 Alloy Bar processed?
Cold-drawn and heat-treated for maximum strength and elasticity.What benefits does 3J21 offer for spring systems?
High strength-to-weight ratio and low modulus drift ensure consistent performance.
