Alloy 945X

UNS N09945

General scope

Alloy 945X is a high strength grade of 945 superior age-hardenable alloy designed to provide a combination of high strength and excellent corrosion resistance.

It also protects against chloride stress-corrosion cracking as well as outstanding general corrosion resistance to reducing chemicals and aids resistance to pitting, crevice corrosion and oxidizing environments.

As Alloy 945X is resistant to sulphide stress-corrosion cracking and stress cracking in H2S environments, it is suitable for down hole and surface gas well components.

These applications include tubular products, valves, hangers, landing nipples, tool joints and packers. The alloy can also be used for fasteners, pump shafting and high strength piping systems.

Alloy 945 is approved under NACE MR0175 / ISO 15156-3 for use in oil and gas applications up to NACE level VII and level VI-450ºF severity.

Chemical composition

C Si Mn P S Cr Ni Mo Cu NbCb Ti Al Fe
Min 0.005 19.50 45.00 3.00 1.50 2.50 0.50 0.01 0.00
Max 0.04 0.50 1.00 0.030 0.030 23.00 55.00 4.00 3.00 4.50 2.50 0.70 0.00

Mechanical properties

Condition: Solution Annealed and Age Hardened.

NACE MR0175 limits hardness to 34 - 42 HRC.
U.T.S 165 KSI Min
0.2% Proof Stress 140 KSI Min
Elongation 18 %
Size range: 2”∅ - 17/2”∅

Primarily manufactured in:

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