The Fundamentals of A286 Bolt Yield Strength

A286 bolts, made from precipitation-hardening iron-nickel-chromium alloy, are renowned for maintaining exceptional yield strength at elevated temperatures. The yield strength of these fasteners typically ranges between 85-110 ksi at room temperature, making them superior to standard stainless steel alternatives.

Material Composition and Strengthening Mechanisms

The outstanding performance of A286 bolts stems from their precise chemical composition:

Temperature Effects on Yield Strength

The yield strength of A286 bolts demonstrates a unique temperature-dependent behavior that differs significantly from conventional fasteners. Below 650°C (1200°F), A286 maintains approximately 85% of its room temperature yield strength, outperforming most competing alloys.

Key Temperature Performance Characteristics

• Room Temperature (21°C/70°F): 85-110 ksi yield strength
• Intermediate Temperatures (200-400°C/392-752°F): 5-15% strength reduction
• High Temperatures (650°C/1200°F): Maintains 70-75 ksi yield strength
• Extreme Temperatures (700°C/1292°F+): Gradual strength decline begins

Industry Applications and Performance Requirements

A286 bolts are specified for critical applications where temperature fluctuations would compromise conventional fasteners:

Aerospace Applications

Jet engine components experience rapid temperature changes from -55°C to 650°C during operation. RAYCHIN LIMITED's A286 fasteners maintain structural integrity through these thermal cycles while resisting creep deformation.

Oil & Gas Equipment

Downhole tools and surface equipment in sour gas environments require A286 bolts that combine high yield strength with sulfide stress cracking resistance at temperatures up to 450°C.

Quality Assurance and Testing Standards

RAYCHIN LIMITED subjects all A286 bolts to rigorous testing protocols to verify temperature performance:

1. ASTM F2281 elevated temperature tension testing
2. AMS 5731/NAS 5731 compliance verification
3. Microstructure analysis for proper precipitation hardening
4. Stress rupture testing at 650°C for 100+ hours

Why Choose RAYCHIN LIMITED for High-Temperature Fasteners

With 15+ years specializing in Specialty Metals Fasteners, RAYCHIN LIMITED offers unmatched technical expertise:

• Proprietary heat treatment processes optimize yield strength at temperature extremes
• Full traceability from raw material to finished product
• Custom engineering solutions for unique thermal challenges
• Global logistics network ensuring timely delivery

Our metallurgical experts are available to consult on your specific high-temperature fastener requirements. Contact us today to discuss how our A286 bolt solutions can enhance your project's reliability and safety.