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Refractory Metal Mo-La vs Mo1/Mo2

Refractory Metal · grade comparison

Refractory Metal Mo-La and Mo1/Mo2 are both refractory metal grades. Both yield at about 560 MPa — strength does not separate them. Mo1/Mo2 is the more ductile: elongation 18% versus 8% for Mo-La. Mo-La runs hotter in service (1,700°C vs 1,000°C continuous) and Mo1/Mo2 conducts heat better (138 W/m·K vs 120 W/m·K). On the shop floor, Mo1/Mo2 sits in a lower cost tier (high, $$$$) than Mo-La (specialty, $$$$$).

Mo-LaChoose it when the part sees heat.

Mo1/Mo2Choose it when the part is bent, formed or impact-loaded, or when cost is the deciding factor.

Mo-La vs Mo1/Mo2: properties

Mo-LaMo1/Mo2

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Shear Modulus

122 GPa17.7 Msi
125 GPa18.1 Msi

Bulk Modulus

265 GPa38.4 Msi
262 GPa38 Msi

Yield Strength (0.2% offset)

560 MPa81.2 ksi
580 MPa84.1 ksi

Elongation at Break

8%
18%

Reduction in Area

25%
45%

Compressive Strength

800 MPa116 ksi
600 MPa87 ksi

Fracture Toughness (K_IC)

20 MPa·√m18.2 ksi·√in
18 MPa·√m16.4 ksi·√in

Charpy V-Notch Impact (RT)

6 J4.4 ft·lbf
8 J5.9 ft·lbf

Hardness, Brinell

228 HB
225 HB

Hardness, Rockwell B

99 HRB
—

Same in both: Elastic (Young's) Modulus 320 GPa46.4 Msi · Poisson's Ratio 0.31 · Tensile Strength (Ultimate) 700 MPa102 ksi · Shear Strength 420 MPa60.9 ksi · Fatigue Strength (Endurance Limit) 300 MPa43.5 ksi · Hardness, Rockwell C 21 HRC · Hardness, Vickers 240 HV

Physical

Density and transition temperatures.

Density

10.2 g/cm³0.37 lb/in³
10.22 g/cm³0.37 lb/in³

Liquidus Temperature

2,620°C4,748 °F
2,623°C4,753 °F

Same in both: Melting Point (Solidus) 2,620°C4,748 °F

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

120 W/m·K69.3 BTU/hr·ft·°F
138 W/m·K79.7 BTU/hr·ft·°F

Specific Heat Capacity

250 J/kg·K0.06 BTU/lb·°F
251 J/kg·K0.06 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

5.3 µm/m·K2.9 µin/in·°F
5 µm/m·K2.8 µin/in·°F

Max Service Temperature (continuous)

1,700°C3,092 °F
1,000°C1,832 °F

Min Service Temperature

-50°C-58 °F
0°C32 °F

Same in both: Latent Heat of Fusion 390 J/g168 BTU/lb

Electrical

Conductivity and insulation.

Electrical Conductivity

30 % IACS
32 % IACS

Electrical Resistivity

5.7×10⁻⁸ Ω·m2.24 µΩ·in
5.4×10⁻⁸ Ω·m2.13 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Galvanic Potential (seawater, vs SCE)

-0.15 V
—

Same in both: Corrosion Resistance 55 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability

35 / 100
40 / 100

Machinability Rating (AISI 1212 = 100 %)

40%
45%

Formability (cold)

25 / 100
30 / 100

Polishability

65 / 100
75 / 100

Same in both: Weldability 20 / 100 · Brazeability / Solderability 70 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

380 MJ/kg163,371 BTU/lb
150 MJ/kg64,488 BTU/lb

Embodied Carbon (primary production)

25 kg CO₂/kg
10 kg CO₂/kg

Embodied Water

300 L/kg35.9 gal/lb
350 L/kg41.9 gal/lb

Same in both: Typical Recycled Content 25%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

69 kN·m/kg
68 kN·m/kg

Specific Stiffness (E / density)

31.4 MN·m/kg
31.3 MN·m/kg

Modulus of Resilience

490 kJ/m³
526 kJ/m³

Thermal Diffusivity

47.1 mm²/s
53.8 mm²/s

Thermal Shock Resistance Index

50
60

Strength versus weight

Yield strength against density for every refractory metal grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.

1502003005007001,0001,5005101520Density (g/cm³)Yield strength (MPa) — log scaleMo-LaMo1/Mo2

Manufacturing and finishing

CapabilityMo-LaMo1/Mo2
Default condition——
Relative cost$$$$$ Specialty$$$$ High
Min. machined wall——
Best machined surface——

Mo-La vs Mo1/Mo2 — frequently asked

What is the difference between Mo-La and Mo1/Mo2?

Refractory Metal Mo-La and Mo1/Mo2 are both refractory metal grades. Both yield at about 560 MPa — strength does not separate them. Mo1/Mo2 is the more ductile: elongation 18% versus 8% for Mo-La.

Which is cheaper, Mo-La or Mo1/Mo2?

Mo1/Mo2 is the lower-cost material: it sits in the high tier ($$$$) while Mo-La is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.

Which is easier to machine, Mo-La or Mo1/Mo2?

Mo1/Mo2, by a small margin. Both rate fair for machinability — 40/100 against 35/100 for Mo-La.

Ready to make it?

Upload a CAD file and FabDigit prices the part in Mo-La and Mo1/Mo2 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.

Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.