Alloy 925 Tube

UNS N09925
Trade Name Incoloy 925 (1)

General scope

This is an age-hardenable Nickel based alloy containing Iron and Chromium as major additions, and also additions of Molybdenum, Copper, Titanium and Aluminum. A combination of high strength and corrosion resistance make it suitable in applications such as valves, hangers, packers, and tubular, in sour gas environments. It can also be used for fasteners, and for pump shafts operating within marine environments.

The combination of Nickel and Chromium renders protection in both oxidizing and reducing atmospheres. The high Nickel content also gives resistance to chloride -ion stress -corrosion cracking. Pitting and crevice corrosion resistance is also excellent. The alloy is produced by a vacuum remelt process.

Unlike 718 this alloy is available across a range of tubular sizes.

When bill of material requirements can be matched against the wide stock sizes available considerable cost savings in both raw material supply and manufacturing are achievable against the comparable bar product.

Chemical composition

C Si Mn P S Cr Ni Mo Cu NbCbTa Ti Al Fe
Min 19.50 42.00 2.50 1.50 1.90 0.10 22.00
Max 0.03 0.50 1.00 0.030 0.030 22.50 46.00 3.50 3.00 0.50 2.40 0.50 0.00

Mechanical properties

Condition: Solution Treated and Age Hardened

NACE MR0175 limits the supply hardness to 38 HRC max.
U.T.S 140 KSI Min (965 N/mm2)
0.2% Proof Stress 110 KSI Min (758 N/mm2)
Elongation 20 %
Red of Area 20 %
CVN Impacts @ 999999°C (0°F) 40 Joules (30 ft-lbf)
Size range: 2.275”∅ - 8.5”∅

Primarily manufactured in:

  • Dubai, UAE
  • Edmonton, Canada
  • Houston, Texas
  • Sheffield, England
  • Singapore