GH4169 Round Bar UNS N07718/Inconel 718 High Temperature Alloy
Round Rod Black and Bright Surface
Inconel® 718 is a nickel-chromium, precipitation hardening alloy
that can maintain good ductility and high strength up to 1300°F.
Inconel 718 has relatively good formability, weldability and
excellent cryogenic properties compared to other PH nickel alloys.
In addition, this alloy can be readily welded w/out hardening or
cracking. Inconel 718 is non-magnetic and has good oxidation and
corrosion resistance in aerospace applications.
Michlin offers Inconel 718 per AMS 5662 (capable of) 5663 in round
bar. In addition, 718 is offered in plate, sheet, pipe, tube, flat
bar and coil. Call today for any Inconel material needs.
(Nickel 718) Strip, Coil, Foil, Wire, AMS 5596, AMS 5597, ASTM
B670, WESTINGHOUSE NFD310021(NUCLEAR), UNE N07718
Honeycombs, bellows, seal rings
lnconel® 718 is a nickel-chromium alloy being precipitation
hardenable and having high creep-rupture strength at high
temperatures to about 1300 °F (700 °C). The poor age-hardening
response of alloy 718 permits annealing and welding without
spontaneous hardening during heating and cooling. This alloy has
excellent weldability compared to the nickel-base super alloys
hardened by Aluminum and Titanium.
Nickel + Cobalt: 50.00 -55.00
Molybdenum: 2.80 -3.30
Columbium + Tantalum: 4.75 -5.50
Titanium: 0.65 -1.15 Aluminum: 0.20 -0.80
Cobalt: 1.00 max Carbon: 0.80 max
Manganese: 0.35 max Silicon: 0.35 max
Phosphorus: 0.015 max Sulfur: 0.015 max
Boron: 0.006 max Copper: 0.30 max
Density: 0.296 lbs/in3, 8.19 g/cm3
Specific Heat: Btu/lb ° F (J/kg ° C):
At 70 ° F (21 ° C): 0.104 (435)
Mean Coefficient of Thermal Expansion: in/in!° (mm/m/° C) 70 - 212
° F (20 - 100 ° C): 7.6 x 10-5 (13.0)
Modulus of Elasticity: KSI (MPa)
29.7 x 103 (204.9 x 103) in tension
Magnetic Permeability, H = 200 Oersteds:
Annealed and Aged: 1.011
Melting Range: 2300 - 2437 ° F (1260 - 1336 ° C)
Coil - Strip, Foil, Ribbon Wire - Profile, Round, Flat, Square
MECHANICAL PROPERTIES AT ROOM TEMPERATURE
Ultimate Tensile Strength: 120 KSI min (827 MPa min)
Yield Strength: (0.2% offset) 60 KSI min (414 MPa min)
Elongation: 30% min (gauges:> 0.040 inches)
lnconel® 718 can be cold rolled to various tempers. Contact Ulbrich
Technical Service for additional information.
HEAT TREAT CAPABILITIES
Two heat treatments are generally utilized for lnconel® 718:
Solution anneal at 1700 - 1850 ° F followed by rapid cooling,
usually in water, plus precipitation hardening at 1325 ° F for 8
hours, furnace cool to 1150 ° F, hold at 1150 ° F for a total aging
time of 18 hours, followed by air cooling. Solution anneal at 1900
- 1950 ° F followed by rapid cooling, usually in water, plus
precipitation hardening at 1400 ° F for 10 hours, furnace cool to
1200 ° F, hold at 1200 ° F for a total aging time of 20 hours,
followed by air cooling.
* Contact Ulbrich Technical Service for additional information.
Refer to NACE (National Associate of Corrosion Engineers) for
#1 - Hot rolled annealed and descaled. It is available in strip,
foil and ribbon. It is used for applications where a smooth
decorative finish is not required.
#2D - Dull finish produced by cold rolling, annealing and
descaling. Used for deep drawn parts and those parts that need to
retain lubricants in the forming process. #2B - Smooth finish
produced by cold rolling, annealing and descaling. A light cold
rolling pass is added after anneal with polished rolls giving it a
brighter finish than 2D. #BA- Bright annealed cold rolled and
#CBA- Course bright annealed cold rolled matte finish and bright
#2 - Cold Rolled #2BA- Smooth finish produced by cold rolling and
bright annealing. A light pass using highly polished rolls produces
a glossy finish. A 2BA finish may be used for lightly formed
applications where a glossy finish is desired in the formed part.
Polished - Various grit finish for specific polish finished
* Not all finishes are available in all alloys - Contact Ulbrich
Sales for more information.
XC - Extra Clean Bright Annealed or Bright Annealed and Cold Rolled
Grease - Ultra bright finish (for decorative applications) Soap -
Soap coating on tempered wire to act as lubricant. * Contact Wire Sales for custom wire finishes.
lnconel® 718 can be hardened by: Cold Working Age Hardening Cold
Working followed by Age Hardening
For best results refer to: SSINA's "Welding of Stainless Steels and
Other Joining Methods".