Designed for demanding sealing applications requiring exceptional strength, reliable spring force retention, and stable performance from cryogenic temperatures up to 1200°F (650°C).
Handa Spring manufactures custom Inconel 718 spring energizers for sealing applications across aerospace, energy, oil & gas, semiconductor, and industrial equipment. Whether you provide drawings, samples, or performance requirements, our engineering team reviews every project before production to ensure manufacturability, tooling feasibility, and consistent spring performance.
Custom Spring Manufacturing Engineering Review Before Production Prototype & Small MOQ Available Fast Quotation & Global DeliveryOverview
Inconel 718 (UNS N07718) is a precipitation-hardened nickel-based superalloy widely used for spring energizers operating under high loads, elevated temperatures, and demanding mechanical conditions. It combines excellent tensile strength, fatigue resistance, and creep performance while maintaining reliable spring properties from cryogenic temperatures up to approximately 1200°F (650°C).
Compared with many high-temperature spring materials, Inconel 718 provides an outstanding balance of strength, weldability, and manufacturing stability, making it suitable for spring designs requiring welded joints, complex geometries, or demanding dimensional tolerances.
Rather than supplying raw material, Handa Spring manufactures finished Inconel 718 spring energizers. Every project is reviewed for manufacturability, tooling requirements, spring force, and production feasibility before quotation, helping customers reduce development risk and shorten lead times.
Quick Summary
| Material | Inconel 718 (UNS N07718, W.Nr 2.4668) |
| Available Forms | Precision Wire · Precision Strip |
| Spring Types | Helical Canted Coil Garter Cantilever Full Contact Detached Leg |
| Operating Temperature | Cryogenic to 1200°F (650°C) |
| Primary Advantages | High Strength · Excellent Fatigue Resistance · Good Creep Resistance · Weldable |
| Manufacturing | Prototype · Existing Tooling · Custom Tooling · Mass Production |
| Typical Industries | Aerospace · Energy · Oil & Gas · Semiconductor · Industrial Equipment |
Quick reference — see detailed sections below for more information.
Recommended when high spring force, elevated temperature performance, and long-term mechanical stability are more critical than maximum corrosion resistance.
Spring Types
Inconel 718 is available in both precision wire and strip forms, allowing it to be manufactured into virtually every spring energizer configuration used in sealing systems.
Manufacturing: Precision strip forming
Best For: Static sealing applications requiring high spring load and long-term reliability.
Manufacturing: Precision wire forming
Best For: Applications requiring nearly constant spring force with high load capacity.
Manufacturing: Precision wire forming
Best For: Rotary shaft seals operating under elevated loads or temperatures.
Manufacturing: Precision stamping & forming
Best For: Dynamic sealing applications requiring controlled spring load with low friction.
Manufacturing: Precision stamping & forming
Best For: Vacuum, gas, and high-performance sealing where uniform contact pressure is required.
Manufacturing: Precision stamping & forming
Best For: Custom sealing designs with limited installation space or non-standard groove configurations.
Tooling & Manufacturing
Different spring designs require different manufacturing methods. Understanding the process helps shorten lead time, reduce tooling costs, and select the most suitable spring configuration.
| Spring Type | Manufacturing Method | Tooling |
|---|---|---|
| Helical Spring | Precision strip forming | No dedicated stamping tooling required |
| Canted Coil Spring | Precision wire forming | No dedicated tooling required |
| Garter Spring | Precision wire forming | No dedicated tooling required |
| Full Contact Spring | Precision stamping & forming | Standard tooling available Custom tooling supported |
| Cantilever Spring (U / V) | Precision stamping & forming | Standard tooling available Custom tooling supported |
| Detached Leg Spring | Precision stamping & forming | Standard tooling available Custom tooling supported |
Engineering Note: Wire-formed springs, including Canted Coil and Garter Springs, can be manufactured without dedicated tooling, making them ideal for prototypes and custom dimensions. Strip-formed springs benefit from our extensive tooling library for common sizes, while new tooling can be developed efficiently for custom profiles.
Manufacturing
Selecting Inconel 718 is only part of the solution. Consistent sealing performance depends on
how accurately the spring is manufactured, heat treated, and validated.
At Handa Spring, we manufacture finished spring energizers—not raw material. Every project is reviewed by our engineering team before production to verify manufacturability, tooling, spring force, and dimensional feasibility.
Every spring is manufactured according to customer drawings, samples, or application requirements. We support both standard sizes and fully customized geometries.
Inconel 718 is processed in both precision wire and strip forms, allowing us to manufacture every major spring energizer configuration from a single material platform.
Wire-formed springs generally do not require dedicated tooling, supporting rapid prototype production. Strip-formed designs leverage existing tooling where possible; custom tooling is available when needed.
Spring force is determined by much more than material selection. Geometry, heat treatment, and manufacturing processes are optimized together to achieve the required sealing load and long-term force retention.
Available processes include precision welding, heat treatment, ultrasonic cleaning, passivation, spring force testing, dimensional inspection, and custom cutting, depending on project requirements.
Every project is reviewed before quotation to reduce development risk, improve manufacturability, and shorten delivery time.
Why Handa Spring
Manufacturing high-performance spring energizers requires more than the right material. It requires manufacturing experience, engineering support, and consistent production capability.
Hundreds of existing tooling profiles allow many standard spring designs to enter production immediately while reducing development cost and lead time.
Every quotation includes a review of drawings, tolerances, tooling requirements, and manufacturability, helping identify potential production risks before manufacturing begins.
Whether you need prototypes, qualification batches, or long-term production, we provide flexible manufacturing solutions based on your project requirements rather than fixed production models.
When original drawings are unavailable, we can manufacture replacement springs by evaluating existing samples, including geometry, material condition, and spring characteristics.
Technical discussions are conducted directly with our engineering team, enabling faster problem solving, drawing reviews, and design optimization throughout the project.
Our spring energizers are supplied to seal manufacturers, OEMs, and engineering companies serving aerospace, semiconductor, oil & gas, energy, and other demanding industrial applications worldwide.
From initial design review to stable mass production, our objective is not simply to manufacture springs, but to help customers reduce development risk, improve product reliability, and accelerate project delivery.
Engineering Experience
Manufacturing reliable Inconel 718 spring energizers requires more than selecting the correct alloy. Spring geometry, forming accuracy, heat treatment, and spring force must work together to achieve consistent sealing performance.
Over years of manufacturing custom spring energizers, we have accumulated practical experience in controlling the key factors that influence production consistency and long-term reliability.
Due to its high strength, Inconel 718 exhibits significant springback during forming. Accurate compensation is essential to achieve the required final dimensions while minimizing trial production.
Mechanical properties depend heavily on proper aging heat treatment. Process consistency helps ensure stable spring force, fatigue resistance, and repeatable performance across production batches.
Spring force is verified throughout development and production. When necessary, geometry and manufacturing parameters are optimized to achieve the specified sealing load rather than relying on material selection alone.
Precision wire and thin strip require careful handling during forming, welding, and heat treatment. Stable processing minimizes distortion while maintaining dimensional accuracy and surface quality.
This engineering review helps identify potential manufacturing risks early, reducing development time and improving production reliability.
Applications
Inconel 718 is widely selected for spring energizers operating under high loads, elevated temperatures,
or demanding mechanical conditions where long-term sealing reliability is critical.
Fuel systems, engine seals, actuators, hydraulic equipment, and flight control systems.
Downhole tools, subsea equipment, wellhead systems, valves, and high-pressure sealing assemblies.
Gas turbines, steam turbines, valve systems, power equipment, and high-temperature sealing applications.
Vacuum equipment, process chambers, wafer handling systems, and high-purity sealing applications.
Valve seals, reactor equipment, control systems, and other safety-critical sealing applications.
Pumps, compressors, rotary equipment, cryogenic systems, and other demanding mechanical sealing applications.
Typical Sealing Applications: Static sealing · Dynamic sealing · Rotary shaft sealing · Valve stem sealing · Pump sealing · Vacuum sealing · High-pressure sealing · Cryogenic sealing.
Comparison
Inconel 718 is one of several premium materials used for spring energizers. The comparison below highlights the key performance differences that typically influence material selection for sealing applications.
| Attribute | Inconel 718 | Inconel X-750 | Inconel 625 | Elgiloy | 17-7PH | 302 |
|---|---|---|---|---|---|---|
| Continuous Temp | 1200°F |
1300°F |
1100°F |
850°F |
600°F |
550°F |
| Stress Relaxation | ||||||
| Fatigue Life | ||||||
| Corrosion | ||||||
| Non-Magnetic | ✗ | ✗ | ✗ | ✓ | ✗ | ✗ |
| Typical Spring Types | Helical, Canted Coil, Full Contact | Helical, Canted Coil, Full Contact | Helical, Canted Coil | Canted Coil, Helical | Helical, Cantilever | Helical, Cantilever |
| Cost | High | High | High | Very High | Low | Low |
Note: Temperature values are for general reference only. Actual performance depends on specific manufacturing processes, heat treatment, material condition, and application parameters. Different suppliers may produce materials with varying characteristics. Always verify with material certification and application-specific testing.
Engineering Selection Guidance
Choose Inconel 718 when your application requires high mechanical strength, elevated temperature capability, and reliable spring force retention.
For temperatures above approximately 1200°F (650°C), Inconel X-750 is often preferred due to its superior stress relaxation resistance. When corrosion resistance is the primary concern, Inconel 625 may be a better choice. For applications emphasizing exceptional fatigue life, Elgiloy remains one of the industry’s benchmark spring materials.
Material selection should always be evaluated together with operating temperature, sealing media, spring geometry, required spring force, and manufacturing feasibility.
If material selection is uncertain, Handa Spring can manufacture spring energizers in multiple alloys according to customer specifications. Contact our engineering team for application-specific recommendations.
FAQ
Common questions about custom Inconel 718 spring energizers.
Can you manufacture Inconel 718 springs according to our drawings?
Can you manufacture from samples or match existing springs?
Which spring types can be manufactured in Inconel 718?
Do all spring types require tooling?
Can you customize spring force?
What is your minimum order quantity?
Can you provide prototypes?
Do you provide engineering support before production?
Contact Handa
Upload Drawing → Receive Engineering Review → Quotation → Prototype → Production
Send us your drawings or specifications, and our engineering team will review your project before quotation.
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