Steel SPCC 1/2H vs SPCC Annealed
Steel · SPCC temper comparison
SPCC 1/2H and SPCC Annealed are two conditions of the same steel grade, SPCC: 1/2H (half hard) versus Annealed. The chemistry is identical, so every difference below comes from the condition. SPCC 1/2H is the stronger of the two: yield strength 430 MPa (62.4 ksi) against 175 MPa (25.4 ksi) for SPCC Annealed, about 146% more; tensile strength follows at 500 MPa (72.5 ksi) vs 295 MPa (42.8 ksi). In exchange, SPCC Annealed is the more ductile: elongation 42% versus 8% for SPCC 1/2H, and SPCC 1/2H is harder (155 HB vs 90 HB). SPCC Annealed runs hotter in service (350°C vs 200°C continuous) and SPCC Annealed conducts electricity better (11.5 % IACS vs 10 % IACS). On the shop floor, SPCC 1/2H machines more easily (very good vs good) and SPCC Annealed welds better (95 vs 85 out of 100).
SPCC 1/2HChoose it when strength drives the design, or when the part is machined in volume.
SPCC AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
SPCC 1/2H vs SPCC Annealed: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · 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) 1,495°C2,723 °F · Liquidus Temperature 1,530°C2,786 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 480 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 272 J/g117 BTU/lb · Min Service Temperature -20°C-4 °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) -0.65 V · Corrosion Resistance 10 / 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 75 / 100 · Polishability 30 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.3 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 25%
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.
SPCC 1/2H vs SPCC Annealed — frequently asked
Is SPCC 1/2H stronger than SPCC Annealed?
Yes. SPCC 1/2H has a typical yield strength of 430 MPa (62.4 ksi) against 175 MPa (25.4 ksi) for SPCC Annealed — about 146% more. Tensile strength is 500 MPa (72.5 ksi) vs 295 MPa (42.8 ksi).
Which condition does FabDigit quote by default, 1/2H or Annealed?
HR is the default SPCC condition in the FabDigit quote flow (neither 1/2H nor Annealed). 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, SPCC 1/2H or SPCC Annealed?
SPCC 1/2H. Its machinability rates very good (72/100) against good (55/100) for SPCC Annealed; for welding the order is SPCC Annealed first (excellent, 95/100) then SPCC 1/2H (excellent, 85/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in SPCC 1/2H and SPCC Annealed 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.