Refractory Metal Mo1/Mo2-AW vs Mo1/Mo2-SR
Refractory Metal · Mo1/Mo2 temper comparison
Mo1/Mo2-AW and Mo1/Mo2-SR are two conditions of the same refractory metal grade, Mo1/Mo2: AW (as-welded deposit) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Mo1/Mo2-AW is the stronger of the two: yield strength 820 MPa (119 ksi) against 580 MPa (84.1 ksi) for Mo1/Mo2-SR, about 41% more; tensile strength follows at 900 MPa (131 ksi) vs 700 MPa (102 ksi). In exchange, Mo1/Mo2-SR is the more ductile: elongation 18% versus 8% for Mo1/Mo2-AW, and Mo1/Mo2-AW is harder (28 HRC vs 21 HRC). Mo1/Mo2-SR runs hotter in service (1,000°C vs 800°C continuous).
Mo1/Mo2-AWChoose it when strength drives the design.
Mo1/Mo2-SRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Mo1/Mo2-AW vs Mo1/Mo2-SR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all refractory metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all refractory metal grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 320 GPa46.4 Msi · Shear Modulus 125 GPa18.1 Msi · Bulk Modulus 262 GPa38 Msi · Poisson's Ratio 0.31 · Reduction in Area 45% · Compressive Strength 600 MPa87 ksi · Shear Strength 420 MPa60.9 ksi · Fatigue Strength (Endurance Limit) 300 MPa43.5 ksi · Fracture Toughness (K_IC) 18 MPa·√m16.4 ksi·√in · Charpy V-Notch Impact (RT) 8 J5.9 ft·lbf · Hardness, Brinell 225 HB
Physical
Density and transition temperatures.
Same in both: Density 10.22 g/cm³0.37 lb/in³ · Melting Point (Solidus) 2,620°C4,748 °F · Liquidus Temperature 2,623°C4,753 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 251 J/kg·K0.06 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 5 µm/m·K2.8 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature 0°C32 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 32 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 55 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 45% · Weldability 20 / 100 · Brazeability / Solderability 70 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 150 MJ/kg64,488 BTU/lb · Embodied Carbon (primary production) 10 kg CO₂/kg · Embodied Water 350 L/kg41.9 gal/lb · Typical Recycled Content 25%
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.
Mo1/Mo2-AW vs Mo1/Mo2-SR — frequently asked
Is Mo1/Mo2-AW stronger than Mo1/Mo2-SR?
Yes. Mo1/Mo2-AW has a typical yield strength of 820 MPa (119 ksi) against 580 MPa (84.1 ksi) for Mo1/Mo2-SR — about 41% more. Tensile strength is 900 MPa (131 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, AW or SR?
SR is the default Mo1/Mo2 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
When should I choose Mo1/Mo2-AW over Mo1/Mo2-SR?
Pick Mo1/Mo2-AW when strength drives the design. Pick Mo1/Mo2-SR when the part is bent, formed or impact-loaded, or when the part sees heat.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Mo1/Mo2-AW and Mo1/Mo2-SR 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.