We’re proud to offer ASTM B637 Inconel 718 (GH4169) coils, a top-tier product engineered for extreme environments where strength, durability, and corrosion resistance are non-negotiable. This nickel-chromium superalloy, strengthened with niobium, molybdenum, titanium, and aluminum, is a go-to material for industries pushing the limits of temperature and stress. Whether it’s jet engines screaming through the skies or deep-sea oil rigs battling corrosive saltwater, our Inconel 718 coils deliver unmatched performance. Let’s dive into what makes this product special, explore the industries it serves, analyze market trends, and showcase why our company stands out as your trusted supplier.
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Inconel 718, also known as GH4169 in some markets, is a precipitation-hardened nickel-chromium alloy designed to withstand punishing conditions. Our coils meet the stringent ASTM B637 standard, ensuring top-notch quality for high-temperature and high-stress applications. The alloy’s composition—50-55% nickel, 17-21% chromium, 4.75-5.50% niobium, plus smaller amounts of molybdenum, titanium, and aluminum—gives it a unique balance of strength and corrosion resistance. With a density of 8.19 g/cm³ and a melting point between 1260°C and 1336°C, it’s built to handle extremes from cryogenic lows of -423°F (-253°C) to highs of 1300°F (700°C).
What sets our Inconel 718 coils apart is their versatility. They’re available in thicknesses from 0.016” to 0.250” and widths up to 48”, making them adaptable for everything from precision aerospace components to robust oilfield equipment. The coils undergo advanced processing, including vacuum induction melting (VIM) and vacuum arc remelting (VAR), followed by precise heat treatments like solution annealing at 1700-1850°F and two-stage aging at 1325°F and 1150°F. This ensures a fine grain structure and mechanical properties like a minimum tensile strength of 185 ksi (1275 MPa) and yield strength of 150 ksi (1034 MPa), even under intense conditions.
The alloy’s ability to resist oxidation up to 1800°F (980°C) and combat chloride-ion stress-corrosion cracking makes it a standout. It’s also weldable in the aged condition, which simplifies fabrication for complex parts. Whether you’re forming turbine blades or crafting high-pressure valves, our Inconel 718 coils are engineered to perform.
|
Item |
Inconel 600 |
Inconel 617 |
Inconel 718 |
Inconel X750 |
Inconel 825 |
|||
|
C |
≤0.15 |
≤0.1 |
0.05-0.15 |
≤0.08 |
≤0.05 |
≤0.08 |
≤0.08 |
≤0.05 |
|
Mn |
≤1 |
≤1.5 |
≤0.5 |
≤0.35 |
≤0.5 |
≤0.35 |
≤1 |
≤1 |
|
Fe |
6-10 |
rest |
≤3 |
rest |
7-11 |
rest |
5-9 |
≥22 |
|
P |
≤0.015 |
≤0.02 |
≤0.015 |
-- |
-- |
-- |
-- |
-- |
|
S |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.015 |
≤0.01 |
≤0.01 |
≤0.03 |
|
Si |
≤0.5 |
≤0.5 |
≤0.5 |
≤0.35 |
≤0.5 |
≤0.35 |
≤0.5 |
≤0.5 |
|
Cu |
≤0.5 |
≤1 |
-- |
≤0.3 |
≤0.5 |
≤0.3 |
≤0.5 |
1.5-3 |
|
Ni |
≥72 |
58-63 |
≥44.5 |
50-55 |
≥58 |
50-55 |
≥70 |
38-46 |
|
Co |
-- |
-- |
10-15 |
≤10 |
-- |
≤1 |
≤1 |
-- |
|
Al |
-- |
1-1.7 |
0.8-1.5 |
≤0.8 |
-- |
0.2-0.8 |
0.4-1 |
≤0.2 |
|
Ti |
-- |
-- |
≤0.6 |
≤1.15 |
-- |
-- |
2.25-2.75 |
0.6-1.2 |
|
Cr |
14-17 |
21-25 |
20-24 |
17-21 |
27-31 |
17-21 |
14-17 |
19.5-23.5 |
|
Nb+Ta |
-- |
-- |
-- |
4.75-5.5 |
-- |
4.75-5.5 |
0.7-1.2 |
-- |
|
Mo |
-- |
-- |
8-10 |
2.8-3.3 |
-- |
2.8-3.3 |
-- |
2.5-3.5 |
|
B |
-- |
-- |
≤0.006 |
-- |
-- |
-- |
-- |
-- |
|
Shape |
Size (mm) |
|
Wire |
0.02-7.50 |
|
Rod/Bar |
8.0-200 |
|
Strip |
(0.5-2.5)*(5-180) |
|
Tube/Pipe |
Customized |
|
Sheet/Plate |
Customized |
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The market for high-performance alloys like Inconel 718 is thriving, driven by demand in aerospace, energy, and industrial sectors. According to recent industry insights, the global nickel alloy market is projected to grow at a CAGR of around 4.5% through 2030, fueled by advancements in aerospace technology and increasing exploration in oil and gas. The aerospace sector, which accounts for a significant share of Inconel 718 use, is expanding due to rising air travel and defense spending. Meanwhile, the push for cleaner energy is boosting demand in power generation, particularly for gas turbines and nuclear reactors.
In the oil and gas industry, deep-sea and high-pressure drilling operations are on the rise, requiring materials that can handle corrosive environments and extreme temperatures. Inconel 718’s ability to resist pitting and stress-corrosion cracking in seawater makes it a staple in this sector. The chemical processing industry is also leaning heavily on high-temperature alloys for equipment exposed to aggressive chemicals. Emerging trends, like additive manufacturing (3D printing) with Inconel 718, are opening new possibilities for customized, lightweight components in aerospace and automotive applications.
Sustainability is another key driver. Industries are prioritizing materials that last longer and reduce maintenance costs, which aligns perfectly with Inconel 718’s durability. However, supply chain challenges, like nickel price volatility and the complexity of alloy production, are pushing companies to partner with reliable suppliers who can deliver consistent quality and fast turnaround. That’s where we come in, with our streamlined production and rigorous quality controls.
Applications of Inconel 718 Coils
Our Inconel 718 coils are a workhorse across multiple industries, thanks to their ability to handle extreme conditions. In aerospace, they’re used for turbine discs, compressor blades, and combustion chambers, where high strength at 650°C is critical. These components endure intense thermal cycling and stress, and our coils deliver the reliability needed to keep engines running smoothly.
In oil and gas, Inconel 718 coils are formed into valves, pipelines, and downhole tools for offshore rigs and high-pressure wells. Their corrosion resistance in saline and acidic environments ensures long-term performance. The power generation sector relies on them for gas turbine parts and nuclear reactor components, where radiation resistance and creep strength are essential.
Chemical processing plants use Inconel 718 for equipment like reactors and heat exchangers exposed to harsh chemicals. The alloy’s resistance to pitting and oxidation keeps operations running without costly downtime. In cryogenic applications, such as liquid fuel rocket motors and storage tanks, the coils maintain toughness at temperatures as low as -423°F (-253°C). Even in automotive and defense, Inconel 718 coils are used for high-temperature fasteners and structural components, proving their versatility.
Comparison with a Competitor
When you’re choosing a supplier for Inconel 718 coils, you want someone who goes beyond the basics. Compared to a typical competitor, our company stands out in several ways. While many suppliers offer Inconel 718, our advanced vacuum melting and proprietary heat treatment processes ensure superior metallurgical quality with minimal inclusions. This translates to better mechanical performance and longer service life for your components.
Our coils are backed by AS9100D aerospace certification and NADCAP accreditation, meeting the strictest industry standards. We also provide full traceability and comprehensive testing—chemical analysis, mechanical testing, ultrasonic inspection, and microstructural examination—so you know exactly what you’re getting. A competitor might skimp on testing or rely on less precise methods, risking inconsistencies.
Lead times are another advantage. Our optimized supply chain and in-house processing mean we can deliver custom orders faster than many others, even for small quantities. While some competitors struggle with supply chain delays or limited customization options, we offer flexible sizes, surface finishes, and heat treatment conditions tailored to your project. Plus, our technical support team works closely with you to ensure the material meets your exact specifications, something not every supplier prioritizes.
Comparison Parameters Table
|
Parameter |
Inconel 718 (GH4169) Coils |
Other Nickel Alloys |
|---|---|---|
|
Tensile Strength (Room Temp) |
≥ 185 ksi (1275 MPa) |
100–160 ksi |
|
Yield Strength (Room Temp) |
≥ 150 ksi (1034 MPa) |
80–130 ksi |
|
High-Temp Strength (650°C) |
≥ 1035 MPa |
600–900 MPa |
|
Corrosion Resistance |
Excellent (seawater, acids) |
Good to moderate |
|
Oxidation Resistance |
Up to 1800°F (980°C) |
Up to 1600°F (870°C) |
|
Fabrication Ease |
High (weldable, formable) |
Moderate to difficult |
|
Temperature Range |
-423°F to 1300°F |
-200°F to 1000°F |
|
Density |
8.19 g/cm³ |
8.0–8.5 g/cm³ |
We don’t just sell Inconel 718 coils—we deliver a product you can trust in the toughest conditions. Our commitment to quality starts with sourcing high-purity raw materials and using state-of-the-art vacuum induction and arc remelting to produce ultra-clean alloys. Every coil undergoes rigorous testing to meet ASTM B637 standards, ensuring consistent performance whether you’re building a jet engine or a chemical reactor.
Customization is a big part of what we do. Need a specific thickness, width, or heat treatment? We’ve got you covered. Our coils are available in a range of sizes and can be machined, polished, or hot-rolled to your specs. We also prioritize fast delivery, so your project stays on track, even with tight deadlines. With over two decades of experience and partnerships with top aerospace and energy companies, we know what it takes to get the job done right.
Our focus on sustainability sets us apart, too. By producing durable, long-lasting coils, we help you reduce maintenance and replacement costs, aligning with industry trends toward greener solutions. And with our technical expertise, we’re not just a supplier—we’re a partner, ready to support your project from concept to completion.
Conclusion
ASTM B637 Inconel 718 (GH4169) coils are a powerhouse material for industries facing extreme temperatures, corrosion, and stress. From aerospace engines to deep-sea oil rigs, our coils deliver the strength, durability, and reliability you need. With a growing market driven by aerospace, energy, and advanced manufacturing, Inconel 718 is more relevant than ever. Our company’s advanced production, rigorous testing, and customer-focused approach make us the go-to choice for high-quality coils. Whether you’re tackling a high-stakes aerospace project or a demanding oilfield application, our Inconel 718 coils are built to perform, and we’re here to help you succeed.
For more details, pls directly contact us.
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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:
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What is Inconel 718 (GH4169) made of?
It’s a nickel-chromium alloy with additions of niobium, molybdenum, titanium, and aluminum, giving it high strength and corrosion resistance. -
What makes Inconel 718 coils suitable for high-temperature applications?
They maintain excellent mechanical properties up to 1300°F (700°C) and resist oxidation up to 1800°F (980°C). -
What industries use Inconel 718 coils?
Aerospace, oil and gas, power generation, chemical processing, and nuclear industries rely on them for extreme conditions. -
How are Inconel 718 coils processed?
They undergo vacuum induction melting, hot or cold working, solution annealing, and precipitation hardening for optimal strength. -
What are the key mechanical properties of Inconel 718 coils?
Minimum tensile strength of 185 ksi (1275 MPa), yield strength of 150 ksi (1034 MPa), and 12% elongation at room temperature. -
Can Inconel 718 coils be welded?
Yes, they can be welded in the aged condition, making them versatile for complex fabrications. -
What corrosion resistance does Inconel 718 offer?
It resists chloride-ion stress-corrosion cracking, pitting, and oxidation in harsh environments like seawater and chemical plants. -
What sizes are available for Inconel 718 coils?
Typically available in thicknesses from 0.016” to 0.250” and widths up to 48”, customizable to project needs.