Steel SPFC780 2PS+BH vs SPFC780-CR
Steel · SPFC780 temper comparison
SPFC780 2PS+BH and SPFC780-CR are two conditions of the same steel grade, SPFC780: 2PS+BH (2 % prestrain + 170 °C/20 min paint-bake) versus CR (cold rolled). The chemistry is identical, so every difference below comes from the condition. SPFC780 2PS+BH is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 480 MPa (69.6 ksi) for SPFC780-CR, about 19% more. In exchange, SPFC780-CR is the more ductile: elongation 16% versus 12% for SPFC780 2PS+BH, and SPFC780 2PS+BH is harder (247 HB vs 232 HB).
SPFC780 2PS+BHChoose it when strength drives the design.
SPFC780-CRChoose it when the part is bent, formed or impact-loaded.
SPFC780 2PS+BH vs SPFC780-CR: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,490°C2,714 °F · Liquidus Temperature 1,520°C2,768 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 45 W/m·K26 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 8.6 % IACS · Electrical Resistivity 2×10⁻⁷ Ω·m7.87 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 12 / 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: Brazeability / Solderability 55 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 20%
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.
SPFC780 2PS+BH vs SPFC780-CR — frequently asked
Is SPFC780 2PS+BH stronger than SPFC780-CR?
Yes. SPFC780 2PS+BH has a typical yield strength of 570 MPa (82.7 ksi) against 480 MPa (69.6 ksi) for SPFC780-CR — about 19% more. Tensile strength is 850 MPa (123 ksi) vs 820 MPa (119 ksi).
Which condition does FabDigit quote by default, 2PS+BH or CR?
CR is the default SPFC780 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 SPFC780 2PS+BH over SPFC780-CR?
Pick SPFC780 2PS+BH when strength drives the design. Pick SPFC780-CR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in SPFC780 2PS+BH and SPFC780-CR 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.