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.

Stock Size Range:

Seamless

OD:
.250" through 2"
Walls:
.028 through .095"

Specifications: AMS 5589

Welded

OD:
1" OD through 7" OD
Walls:
.035" through .080"

Specifications: AMS 5596

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  
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