Alloy 718 Nickel Tubing

Alloy 718 nickel tubing is an age-hardenable nickel-chromium-iron alloy also containing significant amounts of niobium, molybdenum, titanium and aluminum. It combines good corrosion resistance with extremely high strength. Typical applications include heat exchangers and O-rings.

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Stock Size Range:

Welded product

Seamless product

OD:1" OD through 7" OD
OD:.250" through 2"
Walls:.035" through .080" Walls:.028 through .095"
Specifications: AMS 5596 Specifications: AMS 5589
Typical Chemical Composition %
Nickel 50.0-55.0
Chromium 17.0-21.0
Iron nominal 18.5
Molybdenum 7.0-9.5
Niobium 2.75-4.0
Aluminum 0.035
Titanium 1.0-1.7
Sulfur 0.01
Carbon 0.03
Manganese 0.035
Silicone 0.35
Phosphorus 0.015
Boron 0.006
Typical Mechanical Properties
  1000 psi Mpa
Yield Strength (0.2% offset) 159.0 1096
Tensile Strength 191.5 1320
Elongation % 20  
Rockwell Hardness 40C