Refractory Metal Mo-47.5Re-ANN (Annealed)
Heat-treated state
Pick when maximum ductility, deep drawing or high-temperature creep service above the recrystallization temperature is required.
Values for the ANN condition
Other Mo-47.5Re tempers and conditions
Mo-47.5Re is listed in 4 conditions; see the grade overview at Mo-47.5Re.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNThis page Annealed | Pick when maximum ductility, deep drawing or high-temperature creep service above the recrystallization temperature is required. | 490 | 860 | 26 | 23 HRC | — |
As-welded deposit | Reference condition for weld-joint design: Mo-47.5Re fusion welds stay ductile at room temperature, unlike unalloyed Mo. | 520 | 900 | 14 | 27 HRC | 5.7 % IACS |
SRDefault Stress relieved | Standard stocked condition for sheet, foil, rod and wire: high strength with usable room-temperature ductility for forming and welding. | 1,000 | 1,240 | 12 | 34 HRC | — |
Cold worked | Highest strength condition for fine wire, foil and springs where maximum strength and stiffness matter more than ductility. | 1,600 | 1,800 | 5 | 47 HRC | 5.4 % IACS |
What is Mo-47.5Re-ANN?
Mo-47.5Re-ANN is Mo-47.5Re heat treated to ANN — pick when maximum ductility, deep drawing or high-temperature creep service above the recrystallization temperature is required. Mo-47.5Re-ANN has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 75% of refractory metal grades. Elongation at break is 26% and the elastic modulus is 360 GPa (52.2 Msi). Mo-47.5Re-ANN has a density of 13.5 g/cm³ (0.488 lb/in³), heavier than 80% of refractory metal grades. It melts at 2,500°C (4,532 °F). SR is the default condition FabDigit quotes; ANN is available on request or by drawing note.
Advantages
- Readily welded — 80/100, better than 92% of refractory metal grades
- Stiff — 360 GPa (52.2 Msi), better than 91% of refractory metal grades
- High service temperature — 2,000°C (3,632 °F), better than 91% of refractory metal grades
- Forms and bends easily — 75/100, better than 81% of refractory metal grades
- Ductile — tolerates forming and impact — 26%, better than 77% of refractory metal grades
Limitations
- High embodied carbon — 330 kg CO₂/kg, worse than 99% of refractory metal grades
- Heavy — 13.5 g/cm³ (0.488 lb/in³), worse than 80% of refractory metal grades
Mo-47.5Re-ANN properties
Typical room-temperature values for Mo-47.5Re-ANN; 10 are specific to this condition. Other listed values are Mo-47.5Re reference data and may not represent this condition. Bars are the position among refractory metal grades.
Physical3
Mo-47.5Re-ANN has a density of 13.5 g/cm³ (0.488 lb/in³), heavier than 80% of refractory metal grades. It melts at 2,500°C (4,532 °F).
Mechanical11
Mo-47.5Re-ANN has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 75% of refractory metal grades. Elongation at break is 26% and the elastic modulus is 360 GPa (52.2 Msi).
Thermal6
Mo-47.5Re-ANN is rated for continuous service to 2,000°C (3,632 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 56% of refractory metal grades. Thermal expansion is 5.7 µm/m·K (3.17 µin/in·°F).
Electrical3
Mo-47.5Re-ANN conducts electricity at 5.7 % IACS, worse than 51% of refractory metal grades.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 72% of refractory metal grades.
Sustainability3
Producing a kilogram of Mo-47.5Re-ANN takes about 5,000 MJ of energy and emits 330 kg of CO₂ — more than 99% of refractory metal grades. Typical recycled content is 40%.
Manufacturability8
Mo-47.5Re-ANN's machinability is poor (22/100, worse than 73% of refractory metal grades); weldability very good (80/100); formability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Mo-47.5Re-ANN
Is Mo-47.5Re easy to machine?
Very abrasive and strongly work-hardening — use rigid setups, sharp carbide/CBN at low speed with heavy feed, or prefer EDM, grinding and laser cutting; avoid dwelling to prevent smearing.
Can Mo-47.5Re be welded?
GTAW or electron-beam weld in high-purity Ar/He glovebox or vacuum with scrupulously clean, low-C/O material; welds remain ductile at RT, but avoid contamination and prolonged 800–1100 °C exposure that promotes σ-phase.
Can Mo-47.5Re be formed, bent or molded?
Cold rolls to thin foil and draws to fine wire with 60–90 % reductions between vacuum/H₂ interpass anneals at 1400–1600 °C; bend radii in stress-relieved sheet should be ≥2t.
What surface finishes work on Mo-47.5Re?
Chemically etch or electropolish in alkaline/H₂SO₄-methanol baths; for oxidizing service above ~500 °C apply silicide, Ir or Pt-group protective coatings — no anodizing.
Mo-47.5Re 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 |
|---|---|---|
| Rehigh-Re composition near the room-temperature solubility limit; keeps ductility and weldability | 46.5 – 48.5 | 47.5 |
| Ctypical impurity limit | ≤ 0.01 | 0.01 |
| Otypical impurity limit | ≤ 0.01 | 0 |
| Ntypical impurity limit | ≤ 0 | 0 |
| Fetypical impurity limit | ≤ 0.01 | 0 |
| Nitypical impurity limit | ≤ 0.01 | 0 |
| Sitypical impurity limit | ≤ 0.01 | 0 |
| Mo | balance | — |
Mo-47.5Re-ANN — frequently asked
What is Mo-47.5Re-ANN used for?
Mo-47.5Re-ANN is typically used for nuclear applications, aerospace propulsion components and high-temperature bellows and welded assemblies. In short: most weldable refractory alloy; ductile welds at room temperature; cold-rollable to thin foil.
What is the yield strength of Mo-47.5Re-ANN?
Mo-47.5Re-ANN has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 860 MPa (125 ksi) — stronger than 75% of refractory metal grades. Strength varies by condition: see the 4 listed tempers.
Is Mo-47.5Re-ANN easy to machine?
Not especially — machinability is rated poor (22/100, worse than 73% of refractory metal grades). Very abrasive and strongly work-hardening — use rigid setups, sharp carbide/CBN at low speed with heavy feed, or prefer EDM, grinding and laser cutting; avoid dwelling to prevent smearing.
Can Mo-47.5Re-ANN be welded?
Yes — weldability is rated very good (80/100). GTAW or electron-beam weld in high-purity Ar/He glovebox or vacuum with scrupulously clean, low-C/O material; welds remain ductile at RT, but avoid contamination and prolonged 800–1100 °C exposure that promotes σ-phase.
What surface finishes work on Mo-47.5Re-ANN?
Chemically etch or electropolish in alkaline/H₂SO₄-methanol baths; for oxidizing service above ~500 °C apply silicide, Ir or Pt-group protective coatings — no anodizing.
Can Mo-47.5Re-ANN be formed, bent or molded?
Cold rolls to thin foil and draws to fine wire with 60–90 % reductions between vacuum/H₂ interpass anneals at 1400–1600 °C; bend radii in stress-relieved sheet should be ≥2t.
What is the maximum service temperature of Mo-47.5Re-ANN?
Mo-47.5Re-ANN is rated for continuous use to about 2,000°C (3,632 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Mo-47.5Re-SR and Mo-47.5Re-CW?
SR is the default condition — standard stocked condition for sheet, foil, rod and wire: high strength with usable room-temperature ductility for forming and welding. CW: highest strength condition for fine wire, foil and springs where maximum strength and stiffness matter more than ductility. Yield strength is 1,000 MPa in SR versus 1,600 MPa in CW.
Sources
- Molybdenum-Rhenium (Mo-47.5Re) alloy sheet, rod and wire data — Rhenium Alloys, Inc. (2022)
- Molybdenum-rhenium alloys product information — Plansee SE (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Refractory Metals) — ASM International (1990)
- ASM Handbook Vol. 3 — Alloy Phase Diagrams (Mo-Re system) — ASM International (1992)
- Refractory metal property compilations (Mo-Re thermal/electrical data) — CRC / CINDAS (2018)
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.