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Ultra-High Strength Age-Hardenable Alloy

Inconel 945X

Ultra-high strength age-hardenable nickel superalloy delivering 165 KSI minimum strength with outstanding corrosion resistance for the most demanding environments.

165 KSI
Min Tensile Strength
140 KSI
Min Yield Strength
NACE
MR0175 Approved
Inconel 945X Material

Why Choose Inconel 945X?

Ultra-High Strength

165 KSI minimum tensile strength capability

Outstanding Corrosion Resistance

Excellent chloride and sulfide stress cracking resistance

NACE Approved

MR0175 qualified for sour service applications

Age-Hardenable

Superior strength through precipitation hardening

Technical Specifications

Chemical Composition (Weight %)

ElementMinMax
Carbon(C)0.0050.04
Silicon(Si)-0.50
Manganese(Mn)-0.50
Phosphorus(P)-0.030
Sulfur(S)-0.030
Chromium(Cr)19.5023.00
Nickel(Ni)45.0055.00
Molybdenum(Mo)3.005.00
Copper(Cu)1.503.00
Niobium/Columbium(Nb/Cb)2.504.50
Titanium(Ti)0.502.50
Aluminum(Al)0.010.70

Mechanical Properties

Solution Annealed & Age Hardened (Minimum Values)

Ultimate Tensile Strength165 KSI Min
0.2% Proof Stress140 KSI Min
Elongation18% Min
Maximum Hardness46 HRC

Corrosion Resistance Performance

EnvironmentResistanceNotes
Chloride Stress Corrosion CrackingExcellentOutstanding protection
Sulfide Stress CrackingExcellentH2S environments
General CorrosionOutstandingReducing chemicals
Pitting CorrosionExcellentHigh alloy content
Crevice CorrosionExcellentMolybdenum effect
Oxidizing EnvironmentsExcellentBroad resistance

NACE MR0175 Hardness Requirements

SpecificationConditionMax HardnessNotes
NACE MR0175Solution Annealed & Age Hardened46 HRCApproved for sour service
UNS N09946Age Hardened46 HRCSpecific grade designation

Industry Applications

Downhole Equipment

  • Tubular products
  • Landing nipples
  • Tool joints
  • Packers

Surface Equipment

  • Wellhead valves
  • Surface hangers
  • Gas well components
  • High-pressure systems

High-Strength Components

  • Fasteners
  • Pump shafting
  • High-strength piping
  • Load-bearing components

Specialized Applications

  • Sour service environments
  • Corrosive media handling
  • Critical fastening systems
  • High-stress applications

Standards & Specifications

UNS N09945
UNS N09946
NACE MR0175
API 6A CRA

Key Properties

  • • Ultra-high strength (165 KSI minimum)
  • • Excellent chloride stress corrosion cracking resistance
  • • Outstanding general corrosion resistance
  • • NACE MR0175 approved for sour service
  • • Superior age-hardenable alloy design

Related Alloys

Inconel 945

Standard grade with lower strength

Base alloy grade

Inconel 925

Age-hardenable with good strength

Moderate strength option

Inconel 625 Plus

Precipitation-hardenable alternative

Different alloy system

Ready to Specify Inconel 945X?

Get technical specifications, NACE compliance documentation, and expert guidance for your ultra-high strength nickel superalloy requirements.