01
Round Rod
Smaller-diameter rod with controlled straightness for precision machining.
Request Availability →Inconel 718 Round Bar
High-strength precipitation-hardened nickel-chromium-iron round bar for aerospace, oil and gas and high-temperature service.
Mill-Certified Material
Inconel 718 round bar carries full heat-number traceability on every order.
Custom Bar Supply
Specifically, we cut Inconel 718 round bar to your sizes, lengths and heat-treatment conditions.
Fast Global Delivery
Therefore, our team ships Inconel 718 round bar worldwide with complete export papers.
PRODUCT OVERVIEW
About Inconel 718 Round Bar
Inconel 718 round bar is a precipitation-hardenable nickel-chromium-iron alloy. Inconel 718 round bar reaches very high strength through solution treatment and a controlled double age.
We supply Inconel 718 round bar as hot-worked, cold-drawn, peeled or centerless-ground stock to ASTM B637. Every Inconel 718 round bar order carries heat-number traceability and EN 10204 3.1 documents for incoming inspection.
In addition, Inconel 718 round bar shares the UNS N07718 chemistry detailed on our Inconel 718 material page for alloy data.
PRODUCT FEATURES
Key Features of Inconel 718 Round Bar
Inconel 718 round bar is a precipitation-hardenable nickel-chromium-iron alloy supplied to ASTM B637 and AMS 5662/5663. We provide UNS N07718 round bar in solution-treated and aged conditions for aerospace, oil and gas, power generation and cryogenic service. Every Inconel 718 round bar order carries heat-number traceability and EN 10204 3.1 mill test reports.
Inconel 718
Very High Strength
For example, aged Round Bar reaches 185 ksi tensile strength with 150 ksi yield.
01
Wide Temperature Range
In addition, Round Bar keeps dependable properties from -253 °C to about 700 °C.
02
Outstanding Fatigue Resistance
Moreover, Round Bar suits cyclic loading in gas turbine and aerospace parts.
03
Good Weldability
We weld Inconel 718 round bar in the solution-treated condition, then age the weldment where needed.
04
Oxidation Resistance
Inconel 718 round bar resists oxidation in hot air up to about 980 °C.
05
Cryogenic Toughness
Specifically, Round Bar retains strength and toughness for cryogenic tanks and tooling.
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Full Traceability
Specifically, every Inconel 718 round bar order carries heat numbers and EN 10204 3.1 documents.
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Custom Supply
We cut Inconel 718 round bar to your size, length, condition and packing.
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WHY CHOOSE US
Why Choose Inconel 718
Inconel 718 round bar needs a supply partner who controls specification, quality and delivery. Southerly Alloy manages your Inconel 718 round bar order from review to shipment with traceable material.
01
Specification Compliance
We match Inconel 718 round bar to your ASTM B637 or AMS condition and finish.
02
Quality and Traceability
Specifically, every Inconel 718 round bar batch ships with EN 10204 3.1 certificates and heat numbers.
03
Flexible Supply
In addition, we cut Inconel 718 round bar to custom sizes, lengths and packing.
04
Responsive Service
As a result, our team confirms Inconel 718 round bar specifications quickly and ships with full export papers.
MANUFACTURING PROCESS
Reliable Production For Critical Applications
From melting to final check, we process Inconel 718 round bar to your ordered ASTM B637 condition. We control and document each Inconel 718 round bar stage with full heat-number traceability.
01
Raw Material Selection
We weigh nickel, chromium, iron and niobium to make Inconel 718 round bar meet UNS N07718 chemistry.
02
Vacuum Induction Melting
First, we melt the Inconel 718 round bar charge under vacuum to limit gas pickup.
03
ESR or VAR Remelting
Next, ESR or VAR refines the electrode for Inconel 718 round bar to cut inclusions where specified.
04
Hot Forging and Rolling
Then, we forge and hot roll the ingot into Inconel 718 round bar with controlled working.
05
Solution Treatment
After that, we solution treat Inconel 718 round bar near 940–1010 °C to prepare the structure for aging.
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Double Aging
Subsequently, a two-step age near 718 °C and 621 °C develops the characteristic strength of Inconel 718 round bar.
07
Dimensional and Surface Checks
We verify Inconel 718 round bar size, straightness and surface before release.
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Final Inspection and MTR
Finally, we confirm Inconel 718 round bar chemistry and properties, then issue the MTR.
Manufacturing Facility
MANUFACTURING CAPABILITY
Advanced Production For Nickel Alloy Products
Specifically, Southerly Alloy supplies Inconel 718 round bar across the common ASTM B637 forms and conditions. We confirm round bar size, length, straightness and finish against your order. Moreover, round bar is one section in our Inconel 718 bar and rod program.
20,000+ m²
Factory Area
Specifically, modern production facilities for Inconel 718 round bar and dedicated workshops.
50+
Production Machines
Advanced equipment for Inconel 718 round bar manufacturing.
600 Tons
Monthly Capacity
Inconel 718 round bar output across standard and custom sizes.
30+
Technical Engineers
Experienced engineers for Inconel 718 round bar specification support.
30+ Countries
Export Reach
In addition, reliable logistics for Inconel 718 round bar with full documentation.
QUALITY ASSURANCE
Strict Quality Control From Production To Delivery
Every Inconel 718 round bar batch passes inspection before release. In addition, we check Inconel 718 round bar chemistry, mechanical properties, dimensions and surface under our ISO 9001 system.
01
Material Verification
We confirm Inconel 718 round bar grade and heat against your purchase order.
02
Dimensional Inspection
Specifically, we measure round bar size, length and straightness to standard and drawing.
03
Testing and Inspection
In addition, we arrange tensile, hardness and NDT tests where your Inconel 718 round bar specification requires.
04
Certification and Traceability
Every Inconel 718 round bar delivery includes EN 10204 3.1 certificates with heat numbers.
PRODUCT FORMS
Available Product Forms
Inconel 718 round bar comes in several conditions and variants for different machining and service needs. Specifically, the list below shows the common Inconel 718 Round Bar forms we supply.
02
Bright Round Bar
Bright-finished round bar with clean surfaces for visible parts.
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03
Peeled Round Bar
Peeled round bar with controlled diameter for further machining.
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04
Centerless-Ground Round Bar
Ground round bar with close diameter and straightness tolerances.
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05
Forged Round Bar
Forged round sections with a refined wrought structure for heavy service.
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06
Large-Diameter Round Bar
Big forged round sections for heavy aerospace and energy parts.
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07
Precision Round Bar
Tight-tolerance round bar for CNC turning of Inconel 718 parts.
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APPLICATIONS
Engineered For Demanding Industries
Buyers specify Inconel 718 round bar wherever parts need very high strength under heat, cold or cyclic load. Specifically, the applications below show typical Inconel 718 Round Bar uses.
Discuss Your Application →
01
Aerospace Fasteners
Inconel 718 round bar machines into high-strength bolts and studs.
02
Gas Turbine Components
Round bar serves shafts and fasteners exposed to hot cyclic loads.
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Oil and Gas Downhole
Round bar forms downhole tools and sour-service bolting per NACE MR0175.
04
Cryogenic Equipment
Round bar keeps toughness in tanks and hardware down to -253 °C.
05
Power Generation
Round bar makes turbine and high-load boiler attachments.
06
High-Strength Bolting
We supply round bar for pressure-vessel and structural bolting.
07
Pump and Valve Shafts
Round bar gives pump shafts strength in corrosive process media.
08
Heat-Treatment Tooling
Round bar forms fixtures that hold strength near 700 °C.
TECHNICAL INFORMATION
Technical Specifications
Detailed technical information including chemical composition, mechanical properties, standards and available dimensions.
Chemical Composition
ASTM B637 fixes 50.0–55.0% nickel, 17.0–21.0% chromium, 4.75–5.50% niobium plus tantalum and 0.65–1.15% titanium for UNS N07718, and this round bar is quoted to the same window. Therefore, niobium and titanium are the elements that age-harden this round bar.
Consequently, the full composition table on the Inconel 718 material page lists every element against its ASTM B637 limit for this round bar.
Mechanical Properties
The minimum room-temperature values below apply to UNS N07718 bar in the solution-treated and precipitation-hardened condition. Transverse and heavy-section requirements are lower per AMS 5662; the applicable standard governs final acceptance.
| Condition | Product Size | Tensile Strength | Yield Strength, 0.2% Offset | Elongation | Hardness |
|---|---|---|---|---|---|
| Solution Treated + Precipitation Hardened (AMS 5662 / AMS 5663) | Up to 254 mm (10 in.) | ≥185 ksi (1276 MPa) | ≥150 ksi (1034 MPa) | ≥12% | ≥331 HB |
- The standard double age holds the round bar near 718 °C (1325 °F) for 8 hours, furnace cools to 621 °C (1150 °F), and holds 18 hours total before air cooling.
Physical Properties
Published references record a density near 8.19 g/cm³ and a melting range of 1260–1336 °C for this round bar. Moreover, design work on this round bar starts from the aged condition rather than the annealed one.
In addition, the physical properties table on the Inconel 718 material page carries the modulus, the thermal expansion and the remaining design values behind this round bar.
Heat Treatment
Precipitation hardening is what separates Inconel 718 round bar from solid-solution alloys. We supply the round bar in the condition below that your application needs.
| Condition | Typical Treatment |
|---|---|
| Solution Treated | Held near 940–1010 °C (1725–1850 °F), then air cooled |
| Solution + Age Hardened | Two-step age near 718 °C (1325 °F) and 621 °C (1150 °F) for full strength |
| Stress Relieved | Available when specified for the application |
| Custom Condition | Heat treatment according to the agreed specification |
Standards
ASTM B637 is the principal UNS N07718 bar and rod document for this round bar, issued by ASTM International. Moreover, ASME SB637 covers pressure equipment built from this round bar and SAE AMS 5662 and 5663 cover aerospace procurement.
| Standard | Product or Application |
|---|---|
| ASTM B637 | Nickel alloy bar, rod and forgings for high-temperature service |
| ASME SB637 | ASME counterpart for pressure equipment |
| SAE AMS 5662 / 5663 | Nickel alloy 718 bar, forgings and rings |
Overall, the full standards list on the Inconel 718 material page adds the European designations and the remaining product documents for this round bar.
Dimensions
Therefore, Inconel 718 round bar dimensions depend on the manufacturing route, standard and order quantity. The table below lists typical supply ranges; please confirm your size in the inquiry.
| Product Form | Typical Supply | Length |
|---|---|---|
| Round Bar | 6–500 mm dia. | Single Random, Double Random or Custom |
| Round Rod | 3–50 mm dia. | Single Random, Double Random or Custom |
| Bright Round Bar | 6–150 mm dia. | Single Random, Double Random or Custom |
| Peeled Round Bar | 20–400 mm dia. | Custom |
| Centerless-Ground Round Bar | 3–100 mm dia. | Custom |
| Forged Round Bar | 100–500 mm dia. | Custom |
| Large-Diameter Round Bar | 150–500 mm dia. | Custom |
| Precision Round Bar | 3–100 mm dia. | Custom |
Available round bar dimensions depend on the manufacturing route, standard, material condition and order quantity. Please confirm your required round bar size, section and length in the inquiry.
Surface Finishes
Therefore, the surface condition decides how this round bar machines and how closely it holds size on a finishing cell. Specifically, we agree the finish on this Inconel 718 round bar with your order.
| Surface Condition | Typical Use |
|---|---|
| Hot Finished | As-hot-worked surface on this round bar, for parts machined all over. |
| Cold Drawn | Tighter diameter and finish on this round bar, with cold work lifting strength. |
| Rough Turned | A turned surface on this round bar with allowance for later finishing. |
Meanwhile, the surface finishes table on the Inconel 718 material page lists the remaining conditions we quote for this round bar.
Related forms from the same heat cover Inconel 718 Special-Profile Bar, Inconel 718 Square Bar and Inconel 718 Flat Bar when your round bar order needs them.
TECHNICAL DOCUMENTATION
Download Technical Datasheet
Get detailed information including specifications, standards, dimensions and material properties.
HOW TO START
Start Your Order in 6 Simple Steps
From first inquiry to delivered Inconel 718 round bar, our process keeps you informed at every stage. Therefore, most Inconel 718 round bar orders move from inquiry to shipment in under three weeks.
1
Send Your Inquiry
Send your Inconel 718 round bar grade, size, length, quantity and standard.
2
Confirm the Specification
State ASTM B637 or AMS with the Inconel 718 round bar condition and finish you need.
3
Review the Quotation
Receive pricing for Inconel 718 round bar by dimension, quantity and destination.
4
Confirm the Order
Approve the Inconel 718 round bar technical spec, terms and schedule.
5
Production and Inspection
We make and inspect your Inconel 718 round bar to the agreed specification.
6
Shipment and Documentation
Receive Inconel 718 round bar with EN 10204 3.1 MTC and export papers.
CERTIFICATIONS & QUALITY DOCUMENTATION
Certifications & Quality Documentation
Our production and inspection processes are certified to international standards, and every delivery ships with EN 10204 3.1 mill test certificates.
ISO 9001:2015
Quality Management System
PED 2014/68/EU
Pressure Equipment Directive
ASTM / ASME
Material Standards Compliance
EN 10204 3.1
Mill Test Certificates
FAQ
Frequently Asked Questions
Which ASTM specification applies to Inconel 718 Round Bar?
ASTM B637 and ASME SB637 cover Inconel 718 round bar; SAE AMS 5662/5663 serve aerospace.
How is the price of Inconel 718 round bar calculated?
Mainly by weight for Inconel 718 round bar with the prevailing nickel surcharge.
Can Inconel 718 round bar be welded?
Yes. We weld Inconel 718 round bar in the solution-treated condition and age the weldment afterwards where needed.
Is Inconel 718 round bar hard to machine?
We rough-machine Inconel 718 round bar in the solution-treated state, then age it to final strength.
What heat treatment does Inconel 718 round bar need?
Solution treating near 960 °C plus the double age develops full strength in Inconel 718 round bar.
What applications use Inconel 718 round bar?
Inconel 718 round bar serves aerospace fasteners, gas turbine parts, downhole tools and cryogenic equipment.
What is your MOQ for Inconel 718 round bar?
One piece for many common Inconel 718 round bar sizes.
What are your trade terms for Inconel 718 round bar?
Mainly FOB for Inconel 718 round bar; EXW and CIF also available.
What is the lead time for Inconel 718 round bar?
Stock Inconel 718 round bar sizes ship in 7-15 days. Custom sizes take a little longer.
Do you provide EN 10204 3.1 or 3.2 certificates for Inconel 718 round bar?
Yes. Every Inconel 718 round bar delivery includes 3.1; 3.2 with third-party endorsement on request.
REQUEST FOR QUOTATION
Need A Custom Alloy Solution?
Inconel 718 round bar from Southerly Alloy covers standard and custom sizes to ASTM B637. Send your Inconel 718 round bar grade, dimensions, quantity and delivery needs to receive a quotation.
Specifically, our team reviews your Inconel 718 round bar specification, confirms the condition and finish, and returns pricing with clear Incoterms. We then produce and inspect your Inconel 718 round bar before shipping it with full export documentation.
