Refractory Metal Mo1/Mo2
UNS R03600 · JIS Mo · GB Mo1, Mo2
Standard unalloyed molybdenum bar, plate and wire per Chinese GB/T 3877 and Japanese JIS specifications, valued for high melting point, thermal conductivity, and low thermal expansion in electronics and vacuum furnace hardware.
Reference datasheet — Mo1/Mo2 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.
Values for the SR condition
Mo1/Mo2 tempers and conditions
Mo1/Mo2 is supplied in 6 conditions, soft to hard. SR is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
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 |
Supply forms, finishes and certifications
Ways Mo1/Mo2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE | Drawn molybdenum wire | Supply form |
What is Mo1/Mo2?
Standard unalloyed molybdenum bar, plate and wire per Chinese GB/T 3877 and Japanese JIS specifications, valued for high melting point, thermal conductivity, and low thermal expansion in electronics and vacuum furnace hardware. Mo1/Mo2 has a density of 10.22 g/cm³ (0.369 lb/in³), heavier than 68% of refractory metal grades. It melts at 2,620°C (4,748 °F). Mo1/Mo2 has a yield strength of 580 MPa (84.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of refractory metal grades. Elongation at break is 18% and the elastic modulus is 320 GPa (46.4 Msi).
What is Mo1/Mo2 used for?
- Vacuum furnace heating elements and shields
- Sputtering targets
- Electrical contacts/electrodes
- Molten glass electrodes
- Boat/crucible components
Advantages
- Easy to machine — 40/100, better than 93% 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
- High electrical conductivity — 32 % IACS, better than 88% of refractory metal grades
- Conducts heat well — 138 W/m·K (79.7 BTU/hr·ft·°F), better than 87% of refractory metal grades
Limitations
- Difficult to weld — 20/100, worse than 79% of refractory metal grades
Mo1/Mo2 properties
Typical room-temperature values for Mo1/Mo2-SR; bars are the position among refractory metal grades.
Physical3
Mo1/Mo2 has a density of 10.22 g/cm³ (0.369 lb/in³), heavier than 68% of refractory metal grades. It melts at 2,620°C (4,748 °F).
Mechanical16
Mo1/Mo2 has a yield strength of 580 MPa (84.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of refractory metal grades. Elongation at break is 18% and the elastic modulus is 320 GPa (46.4 Msi).
Thermal6
Mo1/Mo2 is rated for continuous service to 1,000°C (1,832 °F). It conducts heat at 138 W/m·K (79.7 BTU/hr·ft·°F), better than 87% of refractory metal grades. Thermal expansion is 5 µm/m·K (2.78 µin/in·°F).
Electrical3
Mo1/Mo2 conducts electricity at 32 % IACS, better than 88% of refractory metal grades.
Chemical & Environmental2
Corrosion resistance is good (55/100), worse than 72% of refractory metal grades.
Sustainability4
Producing a kilogram of Mo1/Mo2 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's machinability is fair (40/100, better than 93% of refractory metal grades); weldability poor (20/100); formability poor (30/100).
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 refractory metal family
Yield strength against density for every refractory metal grade FabDigit runs. Mo1/Mo2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Mo1/Mo2
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.
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) |
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.
Equivalent designations
Standards and trade names that resolve to Refractory Metal Mo1/Mo2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- R03600
- GB (China)
- Mo1Mo2
- JIS
- Mo
How much does Mo1/Mo2 cost?
Mo1/Mo2 is a high-cost refractory metal ($$$$), 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.
Mo1/Mo2 — frequently asked
What is Mo1/Mo2 used for?
Mo1/Mo2 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?
Mo1/Mo2 has a typical yield strength of 580 MPa (84.1 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 79% of refractory metal grades. Strength varies by condition: see the 6 listed tempers.
Is Mo1/Mo2 easy to machine?
Not especially — machinability is rated fair (40/100, better than 93% 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 be welded?
Not readily — weldability is rated poor (20/100). 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?
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 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?
Mo1/Mo2 is rated for continuous use to about 1,000°C (1,832 °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.
How much does Mo1/Mo2 cost?
Mo1/Mo2 is a high-cost refractory metal ($$$$), 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
- 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; 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.