Nickel 200-O vs Nickel 200-SR
Nickel Alloy · Nickel 200 temper comparison
Nickel 200-O and Nickel 200-SR are two conditions of the same nickel alloy grade, Nickel 200: O (annealed) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Nickel 200-SR is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 148 MPa (21.5 ksi) for Nickel 200-O, about 3.8 times as much; tensile strength follows at 660 MPa (95.7 ksi) vs 462 MPa (67 ksi). In exchange, Nickel 200-O is the more ductile: elongation 47% versus 18% for Nickel 200-SR, and Nickel 200-SR is harder (190 HB vs 109 HB). On the shop floor, Nickel 200-SR machines more easily (45 vs 35 out of 100).
Nickel 200-OChoose it when the part is bent, formed or impact-loaded.
Nickel 200-SRChoose it when strength drives the design, or when the part is machined in volume.
Nickel 200-O vs Nickel 200-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.
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
Same in both: Elastic (Young's) Modulus 204 GPa29.6 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 180 GPa26.1 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,435°C2,615 °F · Liquidus Temperature 1,446°C2,635 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 456 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13.3 µm/m·K7.4 µin/in·°F · Latent Heat of Fusion 297 J/g128 BTU/lb · Max Service Temperature (continuous) 315°C599 °F · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.25 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: Castability 40 / 100 · Brazeability / Solderability 75 / 100 · Polishability 80 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 165 MJ/kg70,937 BTU/lb · Embodied Carbon (primary production) 12.5 kg CO₂/kg · Embodied Water 320 L/kg38.3 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.
Nickel 200-O vs Nickel 200-SR — frequently asked
Is Nickel 200-SR stronger than Nickel 200-O?
Yes. Nickel 200-SR has a typical yield strength of 560 MPa (81.2 ksi) against 148 MPa (21.5 ksi) for Nickel 200-O — about 3.8 times as much. Tensile strength is 660 MPa (95.7 ksi) vs 462 MPa (67 ksi).
Which condition does FabDigit quote by default, O or SR?
O is the default Nickel 200 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, Nickel 200-O or Nickel 200-SR?
Nickel 200-SR, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for Nickel 200-O; for welding the order is Nickel 200-O first (excellent, 85/100) then Nickel 200-SR (very good, 80/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Nickel 200-O and Nickel 200-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.