At Harsh Steel Nickel 718 (UNS N07718) is available in Inconel 718 wire, Inconel 718 Round bar, Inconel 718 Forged bar, Inconel 718 hex bar, Inconel 718 Flat bar, Inconel 718 Circles, Inconel 718 Ring, Inconel 718 Tube, Inconel 718 Seamless Pipe, Inconel 718 Welded / ERW Pipe, Inconel 718 Sheet, Inconel 718 Plate, Inconel 718 Coil, Inconel 718 Flanges, Inconel 718 fasteners, Inconel 718 Socket weld Fittings, Inconel 718 ferrule fittings, Inconel 718 Buttweld fittings Like cap, elbow, tee, Reducer. For all stock availability contact Sales.
| Alloy Name | Trade Name | UNS No. | American Specs | German Specs |
| Nickel Alloy 718 | Inconel 718 | UNS N07718 | AMS 5662 Bar and Forgings AMS 5663 Bar and Forgings AMS 5664 Bar and Forgings AMS 5589 Seamless Tube AMS 5590 (Tube *) AMS 5596 Sheet, Strip and Plate AMS 5597 Sheet, Strip and Plate AMS 5832 Welding Wire AMS 5914 Sheet, Strip and Foil AMS 5950 (718SPF) Sheet & Strip |
Werkstoff 2.4668 |
Inconel 718 is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel steel alloy also displays exceptionally high yield, tensile, and creep-rupture properties at high temperatures. This nickel alloy is used from cryogenic temperatures up to long term service at 1200° F. One of the distinguishing features of Inconel 718's composition is the addition of niobium to permit age hardening which allows annealing and welding without spontaneous hardening during heating and cooling. The addition of niobium acts with the molybdenum to stiffen the alloy's matrix and provide high strength without a strengthening heat treatment. Other popular nickel-chromium alloys are age hardened through the addition of aluminum and titanium. This nickel steel alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. This superalloy is used in a variety of industries such as aerospace, chemical processing, marine engineering, pollution-control equipment, and nuclear reactors.
| Chemical Composition Limits | ||||||||||||||||
| Weight% | C | Mn | P | S | Si | Cr | Ni | Mo | Cb | Ta | Ti | Al | Co | B | Cu | Fe |
| Inconel 718 AMS 5662 | 0.08 | 0.35 | 0.015 | 0.015 | 0.35 | 17-21 | 50-55 | 2.8-3.30 | 4.75-5.50 | 0.05 | 0.65-1.15 | 0.20-0.80 | 1.00 | 0.006 | 0.30 | Rem |
Alloy 718 (UNS N07718, W Nr 2.4668) is an austenitic nickel-based superalloy. Alloy 718 exhibits excellent high yield tensile and creep-rupture properties at temperatures up to 1300ºF and oxidation resistance to 1800ºF. Alloy 718 is used in applications that require high strength such as parts for jet engines and high speed airframe parts such as wheels, buckets, spacers and high temperature bolts and fasteners.
There are two main types of solution annealed and aging treatments:
1)
Solution Treatment (AMS 5662 Bar / AMS 5596 Sheet): 1725°F - 1850°F + Air Cool.
Heat Treatment (AMS 5663 Bar) : 1325°F for 8 hrs, cooling 100°F/hr to 1150°F, hold at 1150°F for 8hrs min, + Air Cool.
This treatment gives the highest room temperature tensile and yield strengths as well as producing the highest fatigue strength. It is the optimum heat treatment for Alloy 718 where a combination of rupture life, notch rupture life and rupture ductility is required.
2) Alternative Solution Treatment (AMS 5664 Bar / AMS 5597 Sheet): 1900°F - 1950°F + Air Cool
Heat Treatment: 1400°F for 10hrs, furnace cool to 1200°F, hold at 1200°F for a total aging time of 20 hrs + Air Cool.
This is the prefered treatment in tensile-limited applications as it produces the best transverse ductility in heavy sections, impact strength and low temperature notch tensile strength. However, this treatment has a tendency to produce notch brittleness in stress rupture.
| Material | Condition | Tensile Strength ksi | Yield Strength ksi | Elongation 4D | Reduction of Area % | Hardness |
| AMS 5662 Bar | 1700-1850°F Anneal | - | - | - | - | ≤ 277 HB |
| AMS 5663 Bar | 1700-1850°F Anneal + Age | 185 | 150 | 12 | 15 | ≥331 HB |
| AMS 5664 Bar | 1900-1950°F Anneal | - | - | - | - | 3" dia 248 HB 3-5" dia 285 HB |
| - | 1900-1950°F Anneal + Age | 180 | 150 | 10 | 12 | ≥341 HB |
Typical Mechanical Properties of Alloy 718 Bar above and Alloy 718 Sheet below.
| Material | Condition | Tensile Strength ksi | Yield Strength ksi | Elongation 4D | Hardness |
| Nickel Alloy 718 Sheet | AMS 5596 < 0.1874" thick | 140 | 80 | 30 | 102 HRB |
| Nickel Alloy 718 Sheet | AMS 5596 Aged < 0.1874" thick | 180 | 150 | 12 | ≥36 HRC |
| Nickel Alloy 718 Sheet | AMS 5597 | 140 | 75 | 30 | ≤ 25 HRC |
| Nickel Alloy 718 Sheet | AMS 5597 + Aged | 180 | 150 | 15 | ≥38 HRC |
Harsh steel is a major stockist and Exporter of Nickel Alloy 718 to many countries of the world such as Singapore, Brisbane, Sydney, Melbourne, Australia, Houston, TX, San Diego, San Francisco, Atlanta, USA, Brentford, United Kingdom, Phoenix, Ireland, New Zealand and Canada, Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, Newfoundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran, Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton.