Refractory Metal Mo1/Mo2 SINT
Print state
UNS R03600 · JIS Mo · GB Mo1, Mo2
SINT = sintered
Semi-finished sintered stock for onward forging/rolling or for non-structural electrodes; residual porosity lowers density and ductility.
Values for the SINT condition
Other Mo1/Mo2 tempers and conditions
Mo1/Mo2 is listed in 6 conditions; see the grade overview at Mo1/Mo2.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SINTThis page Sintered | Semi-finished sintered stock for onward forging/rolling or for non-structural electrodes; residual porosity lowers density and ductility. | 250 | 300 | 1 | 143 HB | 28 % IACS |
Recrystallized / fully annealed | For hot-zone furnace parts and deep-drawn shapes that will see >1200 °C anyway; softest and most creep-stable but brittle at room temperature. | 330 | 500 | 35 | 150 HB | 142 W/m·K |
High purity grade, Mo ≥ 99.95 % | Specify Mo1 for electronics, sputtering targets and vacuum hot zones where low C/O/Fe content and best ductility matter. | 560 | 690 | 20 | 20 HRC | 33 % IACS |
SRDefault Stress relieved | Standard stocked condition for plate, sheet and rod — best balance of room-temperature ductility and strength. | 580 | 700 | 18 | 225 HB | 138 W/m·K |
Commercial purity grade, Mo ≥ 99.90 % | Lower-cost purity class for furnace structural parts, boats, shields and glass-melting hardware where trace impurities are tolerable. | 600 | 720 | 15 | 23 HRC | 31 % IACS |
As-welded deposit | Pick for maximum room-temperature strength and stiffness in thin sheet, foil and small-diameter rod. | 820 | 900 | 8 | 28 HRC | 133 W/m·K |
What is Mo1/Mo2 SINT?
Mo1/Mo2 SINT is Mo1/Mo2 in the SINT condition — semi-finished sintered stock for onward forging/rolling or for non-structural electrodes; residual porosity lowers density and ductility. Mo1/Mo2 SINT has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of refractory metal grades. Elongation at break is 1% and the elastic modulus is 275 GPa (39.9 Msi). Mo1/Mo2 SINT has a density of 9.8 g/cm³ (0.354 lb/in³), heavier than 60% of refractory metal grades. It melts at 2,620°C (4,748 °F). SR is the default condition FabDigit quotes; SINT is available on request or by drawing note.
Advantages
- Easy to machine — 50/100, better than 101% of refractory metal grades
- Polishes to a fine finish — 75/100, better than 93% of refractory metal grades
- Low embodied carbon — 10 kg CO₂/kg, better than 90% of refractory metal grades
- Conducts heat well — 120 W/m·K (69.3 BTU/hr·ft·°F), better than 83% of refractory metal grades
- High electrical conductivity — 28 % IACS, better than 81% of refractory metal grades
Limitations
- Limited ductility — 1%, worse than 96% of refractory metal grades
- Low fracture toughness — 10 MPa·√m (9.1 ksi·√in), worse than 96% of refractory metal grades
- Difficult to weld — 15/100, worse than 93% of refractory metal grades
- Limited formability — 5/100, worse than 93% of refractory metal grades
- Needs corrosion protection — 48/100, worse than 77% of refractory metal grades
Mo1/Mo2 SINT properties
Typical room-temperature values for Mo1/Mo2 SINT; 23 are specific to this condition. Other listed values are Mo1/Mo2 reference data and may not represent this condition. Bars are the position among refractory metal grades.
Physical3
Mo1/Mo2 SINT has a density of 9.8 g/cm³ (0.354 lb/in³), heavier than 60% of refractory metal grades. It melts at 2,620°C (4,748 °F).
Mechanical16
Mo1/Mo2 SINT has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of refractory metal grades. Elongation at break is 1% and the elastic modulus is 275 GPa (39.9 Msi).
Thermal6
Mo1/Mo2 SINT is rated for continuous service to 900°C (1,652 °F). It conducts heat at 120 W/m·K (69.3 BTU/hr·ft·°F), better than 83% of refractory metal grades. Thermal expansion is 5 µm/m·K (2.78 µin/in·°F).
Electrical3
Mo1/Mo2 SINT conducts electricity at 28 % IACS, better than 81% of refractory metal grades.
Chemical & Environmental2
Corrosion resistance is fair (48/100), worse than 77% of refractory metal grades.
Sustainability4
Producing a kilogram of Mo1/Mo2 SINT takes about 150 MJ of energy and emits 10 kg of CO₂ — less than 88% of refractory metal grades. Typical recycled content is 25%.
Manufacturability7
Mo1/Mo2 SINT's machinability is fair (50/100, better than 101% of refractory metal grades); weldability poor (15/100); formability not recommended (5/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Mo1/Mo2 SINT
Is Mo1/Mo2 easy to machine?
Machinable with sharp carbide or PCD tooling, positive rake, rigid setup and generous coolant; chips break up and edges chip easily, so avoid heavy interrupted cuts — grinding and EDM are common for finishing.
Can Mo1/Mo2 be welded?
Only electron-beam, laser or GTAW under high-purity inert gas/vacuum; the fusion and heat-affected zones recrystallize and become brittle, so vacuum brazing or mechanical joints are preferred for structural parts.
Can Mo1/Mo2 be formed, bent or molded?
Made by powder metallurgy (press–sinter) then hot rolling/forging; cold bending of sheet is limited — warm form at 150–400 °C with generous bend radii and stress relieve after severe deformation.
What surface finishes work on Mo1/Mo2?
Chemically clean or electropolish to remove oxide before vacuum service; no anodizing — for oxidizing service above 600 °C apply Si- or Si-Cr-Fe silicide pack coatings, and Ni or Cr plating is used for corrosion/braze wetting.
Mo1/Mo2 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 |
|---|---|---|
| C | ≤ 0.01 | 0.01 |
| Ohigher in as-sintered stock | ≤ 0.01 | 0 |
| N | ≤ 0 | 0 |
| Fe | ≤ 0.01 | 0 |
| Ni | ≤ 0.01 | 0 |
| Si | ≤ 0.01 | 0 |
| Al | ≤ 0 | 0 |
| Ca | ≤ 0 | 0 |
| Mg | ≤ 0 | 0 |
| P | ≤ 0 | 0 |
| S | ≤ 0 | 0 |
| MoMo1 ≥99.95 %, Mo2 ≥99.90 % (impurity sum basis, GB/T 3876/3877/4181) | ≥ 99.9 (balance) | — |
Mo1/Mo2 SINT — frequently asked
What is Mo1/Mo2 SINT used for?
Mo1/Mo2 SINT is typically used for vacuum furnace heating elements and shields, sputtering targets, electrical contacts/electrodes, molten glass electrodes and boat/crucible components. In short: baseline unalloyed molybdenum; highest thermal conductivity in family; vacuum furnace standard.
What is the yield strength of Mo1/Mo2 SINT?
Mo1/Mo2 SINT has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 300 MPa (43.5 ksi) — weaker than 72% of refractory metal grades. Strength varies by condition: see the 6 listed tempers.
Is Mo1/Mo2 SINT easy to machine?
Reasonably — machinability is rated fair (50/100, better than 101% of refractory metal grades). Machinable with sharp carbide or PCD tooling, positive rake, rigid setup and generous coolant; chips break up and edges chip easily, so avoid heavy interrupted cuts — grinding and EDM are common for finishing.
Can Mo1/Mo2 SINT be welded?
Not readily — weldability is rated poor (15/100). Only electron-beam, laser or GTAW under high-purity inert gas/vacuum; the fusion and heat-affected zones recrystallize and become brittle, so vacuum brazing or mechanical joints are preferred for structural parts.
What surface finishes work on Mo1/Mo2 SINT?
Chemically clean or electropolish to remove oxide before vacuum service; no anodizing — for oxidizing service above 600 °C apply Si- or Si-Cr-Fe silicide pack coatings, and Ni or Cr plating is used for corrosion/braze wetting.
Can Mo1/Mo2 SINT be formed, bent or molded?
Made by powder metallurgy (press–sinter) then hot rolling/forging; cold bending of sheet is limited — warm form at 150–400 °C with generous bend radii and stress relieve after severe deformation.
What is the maximum service temperature of Mo1/Mo2 SINT?
Mo1/Mo2 SINT is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Mo1/Mo2-SR and Mo1/Mo2 SINT?
SR is the default condition — standard stocked condition for plate, sheet and rod — best balance of room-temperature ductility and strength. SINT: semi-finished sintered stock for onward forging/rolling or for non-structural electrodes; residual porosity lowers density and ductility. Yield strength is 580 MPa in SR versus 250 MPa in SINT.
Sources
- GB/T 3877 — SAC (2017)
- GB/T 4181 — SAC (2017)
- ASTM B386 Molybdenum and Molybdenum Alloy Plate, Sheet, Strip and Foil — ASTM International (2021)
- ASTM B387 Molybdenum and Molybdenum Alloy Bar, Rod and Wire — ASTM International (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (Refractory Metals) — ASM International (1990)
- Molybdenum — material properties datasheet — Plansee SE (2023)
- CRC Handbook of Chemistry and Physics — elemental properties of Mo — CRC Press (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.