Heat Treatment Processes for Optimizing Inconel 718 Round Bars
Inconel 718 is a nickel-chromium-based superalloy known for its outstanding mechanical strength, corrosion resistance, and ability to withstand extreme temperatures. At ASC LLP, one of the leading Inconel 718 round bar suppliers, we ensure that every 718 Inconel round bar undergoes rigorous heat treatment processes to enhance its performance in demanding applications across aerospace, power generation, and marine engineering.
What is Inconel 718 Round Bar?
The 718 Inconel round bar is a high-strength alloy produced under specifications like ASTM B637 UNS N07718. Its composition includes nickel, chromium, iron, molybdenum, niobium, and titanium. The UNS N07718 chemical composition is meticulously balanced to offer excellent tensile strength, fatigue resistance, and corrosion protection at both cryogenic and elevated temperatures.
At ASC LLP, our Inconel 718 bar stock is available in various sizes and finishes to meet diverse industry needs. The Inconel 718 bar price depends on factors such as size, quantity, finish, and market demand.
Why Heat Treatment is Essential for 718 Inconel Round Bar
Heat treatment processes are key to unlocking the full potential of Inconel 718 rod and round bars. The right thermal processing enhances yield strength, hardness, ductility, and stress-rupture resistance. Without proper heat treatment, ASTM B637 N07718 bars may not perform optimally under high-stress or high-temperature conditions.
Key Heat Treatment Processes for Inconel 718 Round Bar
1. Solution Annealing
Solution annealing is the first critical step in preparing the 718 Inconel round bar for further processing. The alloy is heated to around 980°C to 1065°C and held long enough to dissolve strengthening precipitates, followed by rapid cooling. This process:
- Enhances uniformity in UNS N07718 material properties
- Prepares the material for subsequent aging treatment
- Improves machinability
2. Age Hardening
After solution annealing, ASTM B637 UNS N07718 bars undergo double age hardening, which includes:
- First aging at approximately 720°C for 8 hours, then slowly cooled to 620°C.
- Second aging at 620°C for 8 hours, followed by air cooling.
This controlled aging process allows precipitation of gamma prime (γ’) and gamma double prime (γ”) phases, which significantly increase strength and stress rupture resistance.
3. Stress Relieving
For certain applications where welding or extensive machining has occurred, stress-relieving heat treatments are applied at lower temperatures. This helps relieve residual stresses while maintaining the bar’s mechanical integrity.
Benefits of Heat-Treated Inconel 718 Round Bar
- Superior High-Temperature Strength: Precipitation hardening ensures excellent mechanical strength up to 700°C.
- Improved Corrosion Resistance: The heat treatment maintains the natural resistance of UNS N07718 to pitting, oxidation, and chloride stress-corrosion cracking.
- Better Fatigue Resistance: Ideal for rotating machinery, aerospace components, and turbine parts.
- Enhanced Workability: Properly heat-treated Inconel 718 rod has better machinability and formability.
Applications of Heat-Treated Inconel 718 Round Bar
- Jet engine components
- Gas turbines
- Nuclear reactor components
- Fasteners and springs
- Subsea equipment
- Cryogenic storage tanks
At ASC LLP, we maintain a large Inconel 718 bar stock for immediate supply to industries across these sectors.
Inconel 718 Round Bar Specifications
| Specification | Details |
| Grade | UNS N07718 |
| Standard | ASTM B637 |
| Diameter Range | 6mm to 350mm |
| Length | Up to 6000mm or custom lengths |
| Finish | Black, Bright, Peeled, Polished |
Inconel 718 Round Bar Price
The Inconel 718 round bar price varies based on market conditions, size, and finish. ASC LLP ensures competitive pricing and timely delivery for both domestic and international clients. For the latest Inconel 718 bar price, please request a quote directly from our sales team.
Why Choose ASC LLP as Your Inconel 718 Bar Supplier?
- Wide Range of Inconel 718 Bar Stock
- Competitive Pricing with Custom Size Availability
- Compliance with ASTM B637 UNS N07718 Standards
- ISO Certified Quality Management
- On-Time Delivery Across India and Worldwide
Conclusion
Optimizing the properties of 718 Inconel round bar through heat treatment is critical for maximizing performance in extreme conditions. At ASC LLP, we provide premium-quality Inconel 718 bar stock, ready for immediate dispatch, with complete traceability and certification.
Need High-Performance Inconel 718 Round Bars?
Contact ASC LLP — your trusted Inconel 718 bar supplier for quality products, competitive pricing, and timely delivery.
Explore the full range of Inconel 718 Bars products at Amardeep Steel Centre LLP, and let us help you elevate your projects to new heights. Follow us on: Linkedin, Facebook, and Instagram.
