Molybdenum Bolts

Molybdenum Bolts: Superior Fastening Solutions for High-Temperature Applications

Molybdenum bolts are high-performance fasteners specifically designed for extreme-temperature and harsh industrial environments, widely used in vacuum furnaces, aerospace, nuclear equipment, and semiconductor manufacturing. Leveraging the unique physical and chemical properties of molybdenum, these bolts excel in high-temperature strength, creep resistance, and corrosion resistance, making them an ideal replacement for traditional stainless steel or nickel-alloy bolts.

Key Advantages of Moly Bolts and Nuts

1. Ultra-High Temperature Stability
   • Operating Temperature Range: -200°C to 1800°C, with short-term tolerance up to 2000°C, far exceeding stainless steel (≤800°C) and nickel alloys (≤1200°C).
   • High-Temperature Strength Retention: Retains over 70% of room-temperature strength at 1500°C, ensuring structural integrity under prolonged high-temperature loads.
2. Exceptional Creep Resistance
   • Superior high-temperature creep resistance compared to conventional materials. At 1000°C for 100 hours, creep deformation is only 1/3 that of nickel alloys, eliminating risks of loosening or fracture.
3. Corrosion Resistance & Low Contamination
   • Minimal oxidation in vacuum, inert, or reducing atmospheres. Low outgassing rate (<5×10⁻⁶ Pa·m³/s) ensures compatibility with high-purity processes (e.g., monocrystalline silicon growth).
4. Low Thermal Expansion Coefficient
   • Coefficient of thermal expansion (CTE): 5.3×10⁻⁶/°C, ensuring compatibility with tungsten, ceramics, and other materials to reduce thermal stress-induced failures.
5. Long Service Life & Low Maintenance
   • Excellent thermal fatigue resistance maintains structural stability under repeated thermal cycles. Lifespan is 3–5x longer than conventional alloy bolts.

Why Choose Molybdenum Bolts

Moly Hot Zone Parts Application

1. Vacuum Heat Treatment Equipment: Securely fasten internal components under prolonged high temperatures without contamination.
2. Aerospace: Heat-resistant connections for rocket engine nozzles and high-temperature sensor mounts.
3. Nuclear Industry: Fixation of reactor internals with resistance to radiation and high-temperature corrosion.
4. Semiconductor Manufacturing: Precision assembly in monocrystalline silicon growth furnaces and CVD reactors, ensuring process purity.

FOTMA Customization Services

• Dimensions & Specifications: Supports standard (M3–M48) or custom threading, with lengths ranging from 10–500 mm.
• Surface Treatments: Optional nickel plating, siliconizing, or coatings (e.g., Al₂O₃) for enhanced oxidation resistance.
• Certifications & Testing: Material composition reports (ASTM B387), high-temperature mechanical testing, and vacuum outgassing certification.
• Technical Support: Complimentary bolt selection and installation guidance for high-temperature applications.