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MA754 ASHIP-UNRX

Heat-treated state

UNS N07754

Use this as-consolidated, unrecrystallized fine-grain intermediate state only before forming and directional recrystallization: 750 MPa yield at room temperature but far lower high-temperature creep life.

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Values for the ASHIP-UNRX condition

What is MA754 ASHIP-UNRX?

MA754 ASHIP-UNRX is MA754 heat treated to ASHIP-UNRX — use this as-consolidated, unrecrystallized fine-grain intermediate state only before forming and directional recrystallization: 750 MPa yield at room temperature but far lower high-temperature creep life. MA754 ASHIP-UNRX has a yield strength of 750 MPa (109 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 95% of composite grades. Elongation at break is 12% and the elastic modulus is 149 GPa (21.6 Msi). MA754 ASHIP-UNRX has a density of 8.3 g/cm³ (0.3 lb/in³), heavier than 97% of composite grades.

Advantages

  • High strength — 750 MPa (109 ksi), better than 95% of composite grades
  • Ductile — tolerates forming and impact — 12%, better than 94% of composite grades
  • Good UV / weathering resistance — 100/100, better than 93% of composite grades
  • Polishes to a fine finish — 60/100, better than 90% of composite grades
  • High service temperature — 800°C (1,472 °F), better than 89% of composite grades

Limitations

  • Heavy — 8.3 g/cm³ (0.3 lb/in³), worse than 97% of composite grades
  • Difficult to machine — 10/100, worse than 91% of composite grades

MA754 ASHIP-UNRX properties

Typical room-temperature values for MA754 ASHIP-UNRX; 5 are specific to this condition. Other listed values are MA754 reference data and may not represent this condition. Bars are the position among composite grades.

Physical1

MA754 ASHIP-UNRX has a density of 8.3 g/cm³ (0.3 lb/in³), heavier than 97% of composite grades.

Density8.3 g/cm³0.3 lb/in³

Mechanical8

MA754 ASHIP-UNRX has a yield strength of 750 MPa (109 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 95% of composite grades. Elongation at break is 12% and the elastic modulus is 149 GPa (21.6 Msi).

Elastic (Young's) Modulus149 GPa21.6 Msi
Shear Modulus57 GPa8.3 Msi
Bulk Modulus165 GPa23.9 Msi
Poisson's Ratio0.3
Tensile Strength (Ultimate)1,050 MPa152 ksi
Yield Strength (0.2% offset)750 MPa109 ksi
Elongation at Break12%
Shear Strength560 MPa81.2 ksi

Thermal6

MA754 ASHIP-UNRX is rated for continuous service to 800°C (1,472 °F). It conducts heat at 12.9 W/m·K (7.45 BTU/hr·ft·°F), better than 76% of composite grades. Thermal expansion is 12.6 µm/m·K (7 µin/in·°F).

Thermal Conductivity12.9 W/m·K7.5 BTU/hr·ft·°F
Specific Heat Capacity440 J/kg·K0.11 BTU/lb·°F
Thermal Expansion (CTE, 20–100 °C)12.6 µm/m·K7 µin/in·°F
Max Service Temperature (continuous)800°C1,472 °F
Min Service Temperature-196°C-321 °F
Max Service Temperature (short-term)1,300°C2,372 °F

Electrical1

MA754 ASHIP-UNRX has an electrical resistivity of 1.06×10⁻⁶ Ω·m.

Electrical Resistivity1.06×10⁻⁶ Ω·m41.7 µΩ·in

Chemical & Environmental3

Corrosion resistance is very good (78/100), worse than 52% of composite grades. UV resistance is excellent.

Corrosion ResistanceVery good78/100
UV / Weathering ResistanceExcellent100/100
Chemical Resistance Summary—

Sustainability4

Producing a kilogram of MA754 ASHIP-UNRX takes about 260 MJ of energy and emits 17 kg of CO₂ — more than 57% of composite grades. Typical recycled content is 0%.

Embodied Energy (primary production)260 MJ/kg111,780 BTU/lb
Embodied Carbon (primary production)17 kg CO₂/kg
Embodied Water500 L/kg59.9 gal/lb
Typical Recycled Content0%

Manufacturability2

MA754 ASHIP-UNRX's machinability is not recommended (10/100, worse than 91% of composite grades).

MachinabilityNot recommended10/100
PolishabilityGood60/100

Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.

Working with MA754 ASHIP-UNRX

Is MA754 easy to machine?

Very difficult to machine: the Y2O3 dispersoid abrades tooling and the matrix work-hardens strongly. Use solid carbide or ceramic tooling at low speed with heavy feed and copious coolant, or switch to grinding, EDM or electrochemical machining.

Can MA754 be welded?

Not suited to fusion welding — melting breaks up the dispersoid distribution and forms fine equiaxed grains, losing creep strength. Join by diffusion bonding, brazing or mechanical fastening.

Can MA754 be formed, bent or molded?

Produced from mechanically alloyed powder by hot extrusion or hot rolling, then given a directional recrystallisation anneal to develop coarse elongated grains. Formability of finished product is limited and cold forming is effectively not feasible.

What surface finishes work on MA754?

Can be ground and polished. In service it relies on a self-generated Cr2O3 scale for oxidation resistance; aluminide or MCrAlY coatings can be added where hot-corrosion resistance must be increased.

MA754 chemical composition (wt %)

Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.

ElementSpec limit (wt %)Nominal
Cr19 – 2120
Ti0.3 – 0.60.5
Al0.15 – 0.450.3
Feresidual≤ 1.51
C≤ 0.10.05
Y2O3dispersed yttria particles introduced by mechanical alloying0.5 – 0.70.6
Nibalance, about 78%balance

MA754 ASHIP-UNRX — frequently asked

What is MA754 ASHIP-UNRX used for?

MA754 ASHIP-UNRX is typically used for turbine vanes, combustor components and high-temperature fasteners. In short: creep strength to 1100 °C; Y2O3-strengthened ODS superalloy; static hot-section parts only.

What is the yield strength of MA754 ASHIP-UNRX?

MA754 ASHIP-UNRX has a typical yield strength of 750 MPa (109 ksi) and a tensile strength of 1,050 MPa (152 ksi) — stronger than 95% of composite grades.

Is MA754 ASHIP-UNRX easy to machine?

Not especially — machinability is rated not recommended (10/100, worse than 91% of composite grades). Very difficult to machine: the Y2O3 dispersoid abrades tooling and the matrix work-hardens strongly. Use solid carbide or ceramic tooling at low speed with heavy feed and copious coolant, or switch to grinding, EDM or electrochemical machining.

Can MA754 ASHIP-UNRX be welded?

Not suited to fusion welding — melting breaks up the dispersoid distribution and forms fine equiaxed grains, losing creep strength. Join by diffusion bonding, brazing or mechanical fastening.

What surface finishes work on MA754 ASHIP-UNRX?

Can be ground and polished. In service it relies on a self-generated Cr2O3 scale for oxidation resistance; aluminide or MCrAlY coatings can be added where hot-corrosion resistance must be increased.

Can MA754 ASHIP-UNRX be formed, bent or molded?

Produced from mechanically alloyed powder by hot extrusion or hot rolling, then given a directional recrystallisation anneal to develop coarse elongated grains. Formability of finished product is limited and cold forming is effectively not feasible.

What is the maximum service temperature of MA754 ASHIP-UNRX?

MA754 ASHIP-UNRX is rated for continuous use to about 800°C (1,472 °F), and briefly to 1,300°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.

Sources

  1. INCONEL alloy MA754 technical bulletin — Special Metals Corporation (2004)
  2. ASM Specialty Handbook: Heat-Resistant Materials / Superalloys II — ASM International (1997)
  3. UNS N07754 designation listing — SAE/ASTM Unified Numbering System (2017)
  4. High-temperature ODS alloy property compilations — NASA/NIST technical literature (1995)

Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.