Nickel Alloy Monel 401 1/4H vs Monel 401-SR
Nickel Alloy · Monel 401 temper comparison
Monel 401 1/4H and Monel 401-SR are two conditions of the same nickel alloy grade, Monel 401: 1/4H (quarter hard) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Monel 401-SR is the stronger of the two: yield strength 600 MPa (87 ksi) against 350 MPa (50.8 ksi) for Monel 401 1/4H, about 71% more; tensile strength follows at 700 MPa (102 ksi) vs 550 MPa (79.8 ksi). In exchange, Monel 401 1/4H is the more ductile: elongation 25% versus 8% for Monel 401-SR, and Monel 401-SR is harder (210 HB vs 150 HB).
Monel 401 1/4HChoose it when the part is bent, formed or impact-loaded.
Monel 401-SRChoose it when strength drives the design.
Monel 401 1/4H vs Monel 401-SR: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all nickel alloy 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 nickel alloy 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 61 GPa8.8 Msi · Bulk Modulus 133 GPa19.3 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 8.86 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,300°C2,372 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 21 W/m·K12.1 BTU/hr·ft·°F · Specific Heat Capacity 410 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 14.2 µm/m·K7.9 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.18 V · Corrosion Resistance 70 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 45 / 100 · Brazeability / Solderability 75 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 105 MJ/kg45,142 BTU/lb · Embodied Carbon (primary production) 7.5 kg CO₂/kg · Embodied Water 250 L/kg30 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every nickel alloy grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Monel 401 1/4H vs Monel 401-SR — frequently asked
Is Monel 401-SR stronger than Monel 401 1/4H?
Yes. Monel 401-SR has a typical yield strength of 600 MPa (87 ksi) against 350 MPa (50.8 ksi) for Monel 401 1/4H — about 71% more. Tensile strength is 700 MPa (102 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, 1/4H or SR?
ANN is the default Monel 401 condition in the FabDigit quote flow (neither 1/4H nor SR). 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 Monel 401 1/4H over Monel 401-SR?
Pick Monel 401 1/4H when the part is bent, formed or impact-loaded. Pick Monel 401-SR when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Monel 401 1/4H and Monel 401-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.