ATI 718 Nickel Alloy Steel

Table of Contents

Overview of ATI 718 Nickel Alloy Steel

If you’re delving into the world of high-performance materials, you’ve probably come across ATI 718 Nickel Alloy Steel. This superalloy, renowned for its exceptional mechanical properties, corrosion resistance, and versatile applications, is a staple in industries that demand reliability and durability. But what makes ATI 718 so special? Let’s dive in and explore every aspect of this remarkable material.

What is ATI 718 Nickel Alloy Steel?

ATI 718, also known as Inconel 718, is a precipitation-hardening nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum, along with lesser amounts of aluminum and titanium. Its unique composition and the heat treatment process impart excellent tensile strength, toughness, and resistance to oxidation and corrosion, even at elevated temperatures.

ATI 718 Nickel Alloy Steel

Chemical Composition of ATI 718 Nickel Alloy Steel

Understanding the precise chemical makeup of ATI 718 Nickel Alloy Steel is crucial, as each element contributes to its overall performance. Here’s a detailed breakdown:

ElementPercentage (%)
Nickel (Ni)50-55
Chromium (Cr)17-21
Iron (Fe)Balance
Niobium (Nb)4.75-5.50
Molybdenum (Mo)2.80-3.30
Titanium (Ti)0.65-1.15
Aluminum (Al)0.20-0.80
Carbon (C)0.08 max
Manganese (Mn)0.35 max
Silicon (Si)0.35 max
Sulfur (S)0.015 max
Phosphorus (P)0.015 max
Cobalt (Co)1.00 max
Copper (Cu)0.30 max
Boron (B)0.006 max

The Mechanical Properties of ATI 718 Nickel Alloy Steel

The performance of ATI 718 in demanding environments is attributed to its mechanical properties, which are rigorously tested to ensure reliability. Below is a table summarizing these properties:

PropertyValue
Tensile Strength1,240 MPa (180 ksi)
Yield Strength (0.2% Offset)1,034 MPa (150 ksi)
Elongation12-20%
Hardness331-401 HB
Impact ToughnessHigh
Creep ResistanceExcellent
Fatigue StrengthSuperior

Heat Treatment of ATI 718 Nickel Alloy Steel

Heat treatment is a crucial step in the processing of ATI 718, enhancing its mechanical properties. Here’s how the heat treatment process works:

Heat Treatment StepTemperature (°C)Duration (Hours)Purpose
Solution Annealing980-10651-2Dissolve precipitates, homogenize alloy
Precipitation Hardening720-76010Form γ” and γ’ precipitates for strength
Aging620-6758Optimize mechanical properties

Applications of ATI 718 Nickel Alloy Steel

Thanks to its impressive characteristics, ATI 718 finds applications in a variety of industries. Here’s a snapshot of where this superalloy shines:

IndustryApplication
AerospaceTurbine blades, jet engines, rocket motors
Power GenerationGas turbines, nuclear reactors
Oil and GasDrilling tools, downhole equipment
AutomotiveHigh-performance engines
MedicalSurgical instruments, orthopedic implants
MarineSubmarine components, shipbuilding

Suppliers and Pricing Details of ATI 718 Nickel Alloy Steel

Choosing the right supplier is crucial for obtaining high-quality ATI 718 Nickel Alloy Steel. Here’s a look at some key suppliers and typical pricing:

SupplierLocationPricing (USD/kg)Additional Services
ATI Specialty MaterialsUnited States$50-60Custom alloys, technical support
VDM MetalsGermany$55-65Technical consultancy, global shipping
Haynes InternationalUnited States$45-55Heat treatment, machining
Special Metals CorporationUnited States$50-60Wide product range, R&D support
Allegheny Technologies IncUnited States$48-58Metallurgical assistance, fast delivery

Advantages and Disadvantages of ATI 718 Nickel Alloy Steel

Every material has its strengths and weaknesses. Let’s compare the advantages and disadvantages of ATI 718 Nickel Alloy Steel:

AspectAdvantagesDisadvantages
StrengthHigh tensile and yield strengthHigh cost
Corrosion ResistanceExcellent in various environmentsComplex machining and welding processes
Heat ResistanceMaintains properties at high temperaturesRequires precise heat treatment
VersatilityUsed in multiple industriesAvailability might be limited
DurabilityLong service lifeHeavy compared to some alternatives

Comparing ATI 718 Nickel Alloy Steel with Other Alloys

When choosing a material, it’s helpful to compare it with other options. Here’s how ATI 718 stacks up against other alloys:

PropertyATI 718Inconel 625Titanium Ti-6Al-4VStainless Steel 316
Tensile Strength1,240 MPa930 MPa895 MPa515 MPa
Yield Strength1,034 MPa517 MPa828 MPa205 MPa
Corrosion ResistanceExcellentExcellentGoodVery Good
Operating Temperature RangeUp to 700°CUp to 982°CUp to 400°CUp to 870°C
WeightHighHighLowHigh
CostHighHighHighModerate
ATI 718 Nickel Alloy Steel

FAQ

QuestionAnswer
What is ATI 718 Nickel Alloy Steel used for?It’s widely used in aerospace, power generation, oil and gas, automotive, medical, and marine industries.
How does ATI 718 compare to other nickel alloys?ATI 718 offers a superior combination of strength, corrosion resistance, and high-temperature performance.
Can ATI 718 be welded?Yes, but it requires precise control to avoid weld cracking and to maintain its properties.
What are the main elements in ATI 718?The alloy primarily consists of nickel, chromium, iron, niobium, and molybdenum.
Is ATI 718 suitable for high-temperature applications?Absolutely, it maintains excellent mechanical properties even at elevated temperatures.

Conclusion

ATI 718 Nickel Alloy Steel stands out as a versatile and high-performance material, critical in many demanding applications. Its unique combination of chemical composition, mechanical properties, and resistance to heat and corrosion makes it an indispensable choice in industries ranging from aerospace to medical. While it does come with a higher cost and specific processing requirements, the benefits it offers in terms of performance and reliability are well worth the investment.

Whether you’re an engineer looking to select the best material for your project or a student keen to understand the intricacies of superalloys, ATI 718 Nickel Alloy Steel provides a fascinating study of advanced material science in action. So, next time you see a high-performance jet engine or a cutting-edge medical device, there’s a good chance ATI 718 is playing a crucial role behind the scenes.

know more Carbon Steel

Related Posts

Super 316 Stainless Steel

Super 316 Stainless Steel

When it comes to selecting materials for high-performance applications, few alloys match the versatility and robustness of Super 316 Stainless Steel. This advanced material is known for its exceptional corrosion

Read More »
Super 304 Stainless Steel

Super 304 Stainless Steel

Overview Super 304 Stainless Steel is a high-performance material renowned for its superior properties, including excellent corrosion resistance, high strength, and remarkable durability. Used extensively in various industries, it’s a

Read More »
Rene 41 Nickel-Chromium-Cobalt-Molybdenum-Tungsten Alloy Steel

Permalloy Nickel-Iron Alloy Steel

Overview Permalloy Nickel-Iron Alloy Steel is a highly specialized material known for its excellent magnetic properties, making it essential in various high-precision applications. This alloy primarily consists of nickel and

Read More »
Super 316 Stainless Steel

Phynox Nickel-Chromium-Iron Alloy Steel

Overview Phynox Nickel-Chromium-Iron Alloy Steel is an extraordinary material with exceptional properties that make it indispensable in various high-performance applications. This unique alloy stands out for its remarkable strength, corrosion

Read More »

Hot Sale Product

Titanium Wire TA2

titanium wire IMI834

Overview Titanium wire IMI834 is a premium-grade titanium alloy wire that offers exceptional strength, corrosion resistance, and biocompatibility. Developed by

Read More »

Contact Us

Any questions? Send us message now! We’ll serve your request with a whole team after receiving your message.