MA956 PM2000
Grade
UNS S67956 · also PM2000
PM2000 = 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.
Values for the PM2000 condition
Other MA956 grades and fills
MA956 is listed in 2 conditions; see the grade overview at MA956.
- PM2000
- AS-EXT
Compare all 2 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
PM2000This page 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 | — |
What is MA956 PM2000?
MA956 PM2000 is MA956 in the PM2000 grade — alternative European ODS grade with ~5.5% Al for even better alumina-scale stability in long-term 1200–1300 °C oxidation. MA956 PM2000 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 84% of composite grades. Elongation at break is 15% and the elastic modulus is 260 GPa (37.7 Msi). MA956 PM2000 has a density of 7.15 g/cm³ (0.258 lb/in³), heavier than 96% of composite grades.
Advantages
- Tough — resists crack growth — 38 MPa·√m (34.6 ksi·√in), better than 98% of composite grades
- High service temperature — 1,300°C (2,372 °F), better than 97% of composite grades
- Ductile — tolerates forming and impact — 15%, better than 95% 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
Limitations
- Heavy — 7.15 g/cm³ (0.258 lb/in³), worse than 96% of composite grades
- Difficult to machine — 18/100, worse than 80% of composite grades
MA956 PM2000 properties
Typical room-temperature values for MA956 PM2000; 13 are specific to this condition. Other listed values are MA956 reference data and may not represent this condition. Bars are the position among composite grades.
Physical1
MA956 PM2000 has a density of 7.15 g/cm³ (0.258 lb/in³), heavier than 96% of composite grades.
Mechanical10
MA956 PM2000 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 84% of composite grades. Elongation at break is 15% and the elastic modulus is 260 GPa (37.7 Msi).
Thermal5
MA956 PM2000 is rated for continuous service to 1,300°C (2,372 °F). It conducts heat at 12 W/m·K (6.93 BTU/hr·ft·°F), better than 75% of composite grades. Thermal expansion is 11.3 µm/m·K (6.28 µin/in·°F).
Electrical1
MA956 PM2000 has an electrical resistivity of 1.37×10⁻⁶ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (75/100), worse than 55% of composite grades. UV resistance is excellent.
Sustainability4
Producing a kilogram of MA956 PM2000 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 PM2000's machinability is poor (18/100, worse than 80% of composite grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with MA956 PM2000
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.
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.
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 | — |
MA956 PM2000 — frequently asked
What is MA956 PM2000 used for?
MA956 PM2000 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 PM2000?
MA956 PM2000 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 84% of composite grades. Strength varies by condition: see the 2 listed tempers.
Is MA956 PM2000 easy to machine?
Not especially — machinability is rated poor (18/100, worse than 80% 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 PM2000 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 PM2000?
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 PM2000 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 PM2000?
MA956 PM2000 is rated for continuous use to about 1,300°C (2,372 °F), and briefly to 1,400°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.