Steel P20+Ni Annealed vs P20+Ni Prehard
Steel · P20+Ni temper comparison
P20+Ni Annealed and P20+Ni Prehard are two conditions of the same steel grade, P20+Ni: Annealed versus Prehard (pre-hardened). The chemistry is identical, so every difference below comes from the condition. P20+Ni Prehard is the stronger of the two: yield strength 860 MPa (125 ksi) against 430 MPa (62.4 ksi) for P20+Ni Annealed, about 100% more; tensile strength follows at 1,000 MPa (145 ksi) vs 700 MPa (102 ksi). In exchange, P20+Ni Annealed is the more ductile: elongation 20% versus 14% for P20+Ni Prehard, and P20+Ni Prehard is harder (300 HB vs 210 HB). On the shop floor, P20+Ni Annealed machines more easily (good vs fair).
P20+Ni AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
P20+Ni PrehardChoose it when strength drives the design.
P20+Ni Annealed vs P20+Ni Prehard: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel 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 steel 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 900 MPa131 ksi · Shear Strength 620 MPa89.9 ksi · Fracture Toughness (K_IC) 80 MPa·√m72.8 ksi·√in · Hardness, Rockwell B 95 HRB · Hardness, Rockwell C 31 HRC
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,470°C2,678 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 34 W/m·K19.6 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.4×10⁻⁷ Ω·m9.45 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Polishability
Same in both: Weldability 50 / 100 · Formability (cold) 30 / 100 · Brazeability / Solderability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.2 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 30%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
P20+Ni Annealed vs P20+Ni Prehard — frequently asked
Is P20+Ni Prehard stronger than P20+Ni Annealed?
Yes. P20+Ni Prehard has a typical yield strength of 860 MPa (125 ksi) against 430 MPa (62.4 ksi) for P20+Ni Annealed — about 100% more. Tensile strength is 1,000 MPa (145 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, Annealed or Prehard?
Annealed is the default P20+Ni 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, P20+Ni Annealed or P20+Ni Prehard?
P20+Ni Annealed. Its machinability rates good (62/100) against fair (50/100) for P20+Ni Prehard.
Ready to make it?
Upload a CAD file and FabDigit prices the part in P20+Ni Annealed and P20+Ni Prehard 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.