Nickel Alloy Monel 400 Cold Rolled Hard vs Monel 400-O
Nickel Alloy · Monel 400 temper comparison
Monel 400 Cold Rolled Hard and Monel 400-O are two conditions of the same nickel alloy grade, Monel 400: Cold Rolled Hard (full-hard cold-rolled sheet/strip) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Monel 400 Cold Rolled Hard is the stronger of the two: yield strength 690 MPa (100 ksi) against 240 MPa (34.8 ksi) for Monel 400-O, about 188% more; tensile strength follows at 830 MPa (120 ksi) vs 550 MPa (79.8 ksi). In exchange, Monel 400-O is the more ductile: elongation 45% versus 6% for Monel 400 Cold Rolled Hard, and Monel 400 Cold Rolled Hard is harder (250 HB vs 125 HB). Monel 400-O runs hotter in service (480°C vs 300°C continuous). On the shop floor, Monel 400-O welds better (very good vs good).
Monel 400 Cold Rolled HardChoose it when strength drives the design.
Monel 400-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Monel 400 Cold Rolled Hard vs Monel 400-O: 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.
Monel 400 Cold Rolled HardMonel 400-O
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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: Elastic (Young's) Modulus 179 GPa26 Msi · Shear Modulus 66 GPa9.6 Msi · Bulk Modulus 152 GPa22 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 8.8 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,300°C2,372 °F · Liquidus Temperature 1,350°C2,462 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 21.8 W/m·K12.6 BTU/hr·ft·°F · Specific Heat Capacity 427 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13.9 µm/m·K7.7 µin/in·°F · Latent Heat of Fusion 297 J/g128 BTU/lb · Min Service Temperature -260°C-436 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.2 % IACS · Electrical Resistivity 5.47×10⁻⁷ Ω·m21.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V
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: Brazeability / Solderability 65 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 120 MJ/kg51,591 BTU/lb · Embodied Carbon (primary production) 9.5 kg CO₂/kg · Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 35%
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 400 Cold Rolled Hard vs Monel 400-O — frequently asked
Is Monel 400 Cold Rolled Hard stronger than Monel 400-O?
Yes. Monel 400 Cold Rolled Hard has a typical yield strength of 690 MPa (100 ksi) against 240 MPa (34.8 ksi) for Monel 400-O — about 188% more. Tensile strength is 830 MPa (120 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, Cold Rolled Hard or O?
O is the default Monel 400 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.
Which is easier to machine, Monel 400 Cold Rolled Hard or Monel 400-O?
Monel 400 Cold Rolled Hard. Its machinability rates fair (35/100) against poor (30/100) for Monel 400-O; for welding the order is Monel 400-O first (very good, 82/100) then Monel 400 Cold Rolled Hard (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Monel 400 Cold Rolled Hard and Monel 400-O 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.