General Information
Chemical Composition
Physical Properties
Mechanical Properties
General Information
Inconel® 718 is a precipitation-hardening nickel-chromium alloy containing
significant amounts of iron, columbium, and molybdenum, along with lesser amounts of aluminum and titanium. 718
materials maintain high strength and good ductility up to 1300°F (704°C). This alloy has relatively good
weldability, formability, and excellent cryogenic properties compared to other precipitation hardening nickel
alloys. The sluggish precipitation hardening response of this alloy allows it to be readily welded without hardening
or cracking. Alloy 718 is non-magnetic. It maintains good corrosion resistance and oxidation resistance and is used
for parts requiring high resistance to creep and stress rupture up to 1300°F (704°C) and oxidation resistance up to 1800°F (982°C).
Standard Inventory Specifications
- 718 Sheet, Coil and Plate:
- UNS N07718
- AMS 5596
- ASTM B 670
- ASME SB 670
- B50TF14
- 718 Round Bar:
- UNS N07718
- AMS 5662
- ASTM B 637
- B50TF15
- B50809D (Power Generation)
Other industry standards we comply with:
- PWA-LCS
- DFARS Compliant
- RR SABRe Edition 2
- S1000 / S-SPEC-1
- GE Aviation S-SPEC-35 AeDMS S-400
- EN 2.4668
- EN 10204
Common Trade Names
- Haynes 718 (® Haynes International)
- ATI 718 (™ Allegheny Technologies)
- Inconel Alloy 718 (® Special Metals)
Common Applications of 718
- Jet engine
- Gas turbine operations
- Base plates
- Rotor bolts (Power Generation)
Chemical Composition
Chemical Composition of Inconel 718
Element
Percent by Weight
C
Carbon
0.08 maximum
Mn
Manganese
0.35 maximum
P
Phosphorous
0.015 maximum
S
Sulfur
0.015 maximum
Si
Silicon
0.35 maximum
Cr
Chromium
17.00 – 21.00
Ni
Nickel
50.00 – 55.00
Mo
Molybdenum
2.80 – 3.30
Nb
Columbium
4.75 – 5.50
Ti
Titanium
0.65 – 1.15
Al
Aluminum
0.20 – 0.80
Co
Cobalt
1.00 maximum
B
Boron
0.006 maximum
Cu
Copper
0.30 maximum
Ta
Tantalum
0.05 maximum
Fe
Iron
Balance
Physical Properties
Alloy 718 Physical Properties
Density and Specific Gravity
Annealed Condition | Aged Condition | |
Density | 0.296 lb./in3 (8.19 g/cm3) | 0.297 lb./in3 (8.22 g/cm3) |
Specific Gravity | 8.19 | 8.22 |
Thermal Conductivity
Temperature Range | Coefficients | ||
°C | °F | W/m·K | Btu/(hr/ ft²/in/°F) |
0-100 | 32-212 | 6.5 | 11.2 |
Electrical Resistivity at 68°F (20°C)
- Annealed: 127 microhm-cm
- Aged: 121 microhm-cm
Mechanical Properties
Mechanical Properties and Yield Strength of Alloy 718
Product | Yield Strength Max (0.2% Offset) | Ultimate Tensile Strength Max | Elongation (% in 2″) |
Sheet and Strip | 80,000 psi (550 MPa) | 14,000 (965 MPa) | 30 (min) |
Plate | 105,000 psi (725 MPa) | 150,000 (1,035 MPa) | 30 (min) |
Typical Short Time Tensile Properties as a Function of Temperature
- Solution Treatment: 1800°F (982°C) 1 hour
- Precipitation Treatment: 1325°F (718°C) 8 hours, Furnace Cool at 100°F (55°C) per hour to 1150°F (621°C) 8 hours Inconel 718 machining often results in less tool life due to the work hardening and abrasion properties of the alloy. High cutting pressure and temperature also contributes towards work hardening, surface tearing, and deformation.
718 Seamless Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ4-Φ1219mm; WT:…
Introduction: Wisine its production capacity of stainless steel seamless pipe, roughly 2100 tons per month. As per your requirement…
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718 Sanitary Tube
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ8-Φ850mm; WT:…
Introduction: Wisine produces sanitary tubes that are widely applicable to food & beverage industry, pharmaceutical industry…
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718 Thick-walled Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ10-Φ1219mm; WT:…
Introduction: Thick-walled stainless steel pipe, also named stainless steel hollow bar, are usually used for mechanical applications or…
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718 Welded Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ6-Φ2800mm; WT:…
Introduction: Wisine produces welded stainless steel pipe in different shapes: round, square and rectangle. In comparison with seamless pipe…
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718 Square Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Side Length: 4×4-300×300mm…
Introduction: As per your requirement, stainless steel square pipe can be made into welded stainless steel square pipe or…
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718 Rectangle Pipe
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Side Length: 4×6-200×400…
Introduction: Stainless steel rectangle pipe is hollow stainless steel long product and can be classified into seamless and welded…
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718 Capillary Tube
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ0.4-Φ16.0mm; WT:…
Introduction: Wisine produces stainless steel capillary with different finishes for your option. Quite common in our international markets…
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718 Coil Tube
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: OD: Φ0.4-Φ16mm; WT:…
Introduction: Stainless steel coil tubes refer to those tubes with diameter ranging from 0.5mm to 20mm and wall thickness from…
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718 Elbow
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN15 – DN600…
Wall Thickness: Sch5S- Sch160…
Classification: 45° elbow, 90° elbow, 180° elbow, long radius elbow, short radius elbow…
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718 Flange
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN6 – DN750…
Wall Thickness: Sch5S-Sch160S…
Classification: SW (Socket Welding) flange, WN (Welding Neck) flange, SO (Slip-On) flange…
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718 Tee
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN15 – DN750…
Wall Thickness: Sch5S-Sch160…
Classification: Straight tee, reducing tee…
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718 Cross
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN15 – DN1200…
Wall Thickness: Sch5S-Sch160…
Classification: Straight cross, reducing cross…
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718 Reducer
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN15 – DN500…
Wall Thickness: Sch5S-Sch160…
Classification: Concentric reducer, eccentric reducer…
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718 Pipe Cap
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Outer Diameter: DN15 – DN1200…
Wall Thickness: Sch5S- Sch160…
Classification: Hemispherical cap, elliptical/oval cap, dish cap, spherical cap…
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718 Round Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Diameter: 2mm – 600mm…
Introduction: Stainless steel round bars are categorized as both long products and bar materials. SS round bar is long stainless steel product…
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718 Flat Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Thickness: 0.5mm – 200mm…
Introduction: Stainless steel flat bars are of rectangle shape with root face (or round edges) and they can be semi-finished or finished…
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718 Angle Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Equal Angle Bar Dimensions…
Introduction: Stainless steel angle bars are L-shape bars with two side widths perpendicular to each other. The two widths can be equal…
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718 Square Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Dimensions: 2mmx2mm – …
Introduction: Stainless steel square bars are long stainless steel products with its cross section as square. At Wisine, we produce SS square…
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718 Hexagon Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Dimension: 3mm – 180mm…
Introduction: Stainless steel hex bar is solid stainless steel long product with its cross section as hexagonal. Wisine produce stainless…
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718 Channel Bar
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Hot Rolled: 40mmx80mmx…
Introduction: Stainless steel channel bar is stainless steel long product with its section as U shape. At Wisine, apart from stainless steel…
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718 Sheet
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Thickness: ≤ 5mm…
Introduction: In Wisine, we refer to thickness below 5mm as stainless steel sheets and thickness above 5mm as SS plates…
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718 Plate
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Thickness: ≥ 5mm…
Introduction: In Wisine, we regard thickness above (includes) 5mm as stainless steel plates. Our stainless steel plates are hot rolled…
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718 Coil
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Width: ≥ 610mm…
Introduction: Our stainless steel coils are primary quality coils from the origin of Baosteel, ZPSS, TISCO, JISCO, ATI, SMC, HAYNES…
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718 Strip
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Width: ≤ 610mm…
Introduction: Stainless steel strip has its width less than 610mm, with its thickness ranging from 0.02mm to 6mm. For width over 610mm…
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718 Wire
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Diameter: 0.02mm-25mm…
Introduction: Wisine produces high quality wire and stainless steel wire rope. Our annual production capacity is roughly 8000 tons…
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718 Wire Rod
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Diameter: Hot rolled wire rod:…
Weight: ≤500Kg per roll
Tolerance: H9, H11
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718 Wire Rope
Standard: ASTM, JIS, DIN, EU…
Grade: 718…
Size: Φ0.15mm-Φ50mm…
Introduction: Wisine produces high quality wire and stainless steel wire rope. Our annual production capacity is roughly 8000 tons…