MA956
UNS S67956 · also PM2000
Mechanically-alloyed Fe-Cr-Al matrix dispersion-strengthened with Y2O3 particles, giving exceptional high-temperature strength and oxidation resistance for gas turbine combustor and heat-treatment fixtures.
Reference datasheet — MA956 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
MA956 grades and fills
MA956 is supplied in 2 conditions, soft to hard.
Compare all 2 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Plansee-type higher-Al ODS FeCrAl equivalent | Alternative European ODS grade with ~5.5% Al for even better alumina-scale stability in long-term 1200–1300 °C oxidation. | 520 | 640 | 15 | |
As-extruded / unrecrystallized fine-grain | Pick when room- and intermediate-temperature strength and toughness matter more than 1100 °C+ creep life. | 800 | 950 | 8 |
Supply forms, finishes and certifications
Ways MA956 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
RX-BARDefault | Recrystallized bar / rod | Supply form |
TUBE | Extruded / drawn thin-wall tube | Supply form |
WIRE | Drawn wire | Supply form |
RX-SHT | Recrystallized sheet / plate | Surface finish |
What is MA956?
Mechanically-alloyed Fe-Cr-Al matrix dispersion-strengthened with Y2O3 particles, giving exceptional high-temperature strength and oxidation resistance for gas turbine combustor and heat-treatment fixtures. MA956 has a density of 7.2 g/cm³ (0.26 lb/in³), heavier than 96% of composite grades. MA956 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 84% of composite grades. Elongation at break is 18% and the elastic modulus is 265 GPa (38.4 Msi).
What is MA956 used for?
- gas turbine combustor liners
- furnace muffles/fixtures
- radiant burner tubes
Advantages
- Ductile — tolerates forming and impact — 18%, better than 95% of composite grades
- High service temperature — 1,200°C (2,192 °F), better than 94% of composite grades
- Good UV / weathering resistance — 100/100, better than 93% of composite grades
- Tough — resists crack growth — 35 MPa·√m (31.9 ksi·√in), better than 91% of composite grades
- Polishes to a fine finish — 60/100, better than 90% of composite grades
Limitations
- Heavy — 7.2 g/cm³ (0.26 lb/in³), worse than 96% of composite grades
- Difficult to machine — 20/100, worse than 77% of composite grades
MA956 properties
Typical room-temperature values; bars are the position among composite grades.
Physical1
MA956 has a density of 7.2 g/cm³ (0.26 lb/in³), heavier than 96% of composite grades.
Mechanical10
MA956 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 84% of composite grades. Elongation at break is 18% and the elastic modulus is 265 GPa (38.4 Msi).
Thermal5
MA956 is rated for continuous service to 1,200°C (2,192 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), better than 74% of composite grades. Thermal expansion is 11.3 µm/m·K (6.28 µin/in·°F).
Electrical1
MA956 has an electrical resistivity of 1.3×10⁻⁶ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (72/100), worse than 58% of composite grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of MA956 takes about 260 MJ of energy and emits 18 kg of CO₂ — more than 57% of composite grades. Typical recycled content is 0%.
Manufacturability2
MA956's machinability is poor (20/100, worse than 77% of composite grades).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. MA956 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with MA956
Is MA956 easy to machine?
Machine like a hard ferritic superalloy: rigid setups, carbide or CBN at low speed with heavy positive feed — the Y2O3 dispersoid is highly abrasive and the alloy work-hardens; grinding and EDM are common for finishing.
Can MA956 be welded?
Fusion welding destroys the oxide dispersion in the fused zone and is not recommended; join by diffusion bonding, friction/inertia welding, brazing or mechanical fastening.
Can MA956 be formed, bent or molded?
Supplied as hot-extruded/hot-rolled PM product; hot form above ~800 °C, avoid heavy cold work on coarse recrystallized grain because the ductile–brittle transition lies near or above room temperature.
MA956 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.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cr | 18.5 – 21.5 | 20 |
| Alforms protective α-Al2O3 scale | 3.75 – 5.75 | 4.5 |
| Ti | 0.2 – 0.6 | 0.4 |
| Y2O3nano-dispersoid introduced by mechanical alloying | 0.3 – 0.7 | 0.5 |
| C | ≤ 0.1 | 0.03 |
| Niresidual | ≤ 0.5 | |
| Fe | balance |
What surface finishes work on MA956?
Normally used bare — the self-healing alumina scale grown by a 1000–1100 °C air pre-oxidation is the working surface; grit-blast/pickle before pre-oxidation and avoid coatings that react with Al.
Equivalent designations
Standards and trade names that resolve to MA956 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S67956
- Trade names
- PM2000
How much does MA956 cost?
MA956 is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
MA956 — frequently asked
What is MA956 used for?
MA956 is typically used for gas turbine combustor liners, furnace muffles/fixtures and radiant burner tubes. In short: 1250 °C ODS ferritic; self-healing alumina scale; not fusion weldable.
What is the yield strength of MA956?
MA956 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 655 MPa (95 ksi) — stronger than 84% of composite grades. Strength varies by condition: see the 2 listed tempers.
Is MA956 easy to machine?
Not especially — machinability is rated poor (20/100, worse than 77% of composite grades). Machine like a hard ferritic superalloy: rigid setups, carbide or CBN at low speed with heavy positive feed — the Y2O3 dispersoid is highly abrasive and the alloy work-hardens; grinding and EDM are common for finishing.
Can MA956 be welded?
Fusion welding destroys the oxide dispersion in the fused zone and is not recommended; join by diffusion bonding, friction/inertia welding, brazing or mechanical fastening.
What surface finishes work on MA956?
Normally used bare — the self-healing alumina scale grown by a 1000–1100 °C air pre-oxidation is the working surface; grit-blast/pickle before pre-oxidation and avoid coatings that react with Al.
Can MA956 be formed, bent or molded?
Supplied as hot-extruded/hot-rolled PM product; hot form above ~800 °C, avoid heavy cold work on coarse recrystallized grain because the ductile–brittle transition lies near or above room temperature.
What is the maximum service temperature of MA956?
MA956 is rated for continuous use to about 1,200°C (2,192 °F), and briefly to 1,400°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does MA956 cost?
MA956 is a high-cost composite ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- INCOLOY alloy MA956 datasheet — Special Metals Corporation (2004)
- PM 2000 ODS FeCrAl alloy data — Plansee / Metallwerk Plansee (2000)
- ASM Handbook Vol. 7 — Powder Metallurgy / Mechanical Alloying & ODS alloys — ASM International (2015)
- UNS S67956 alloy registration data — SAE/ASTM Unified Numbering System (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.