Steel Silicon Steel Annealed vs Silicon Steel Hot Rolled
Steel · Silicon Steel temper comparison
Silicon Steel Annealed and Silicon Steel Hot Rolled are two conditions of the same steel grade, Silicon Steel: Annealed versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. Silicon Steel Hot Rolled is the stronger of the two: tensile strength 500 MPa (72.5 ksi) against 460 MPa (66.7 ksi) for Silicon Steel Annealed, about 9% more. Silicon Steel Annealed is harder — 170 HB against 160 HB for Silicon Steel Hot Rolled — which matters for wear surfaces and threads. Silicon Steel Hot Rolled runs hotter in service (250°C vs 200°C continuous) and Silicon Steel Hot Rolled conducts heat better (28 W/m·K vs 22 W/m·K). On the shop floor, Silicon Steel Hot Rolled welds better (good vs fair).
Silicon Steel AnnealedChoose it when surface hardness matters.
Silicon Steel Hot RolledChoose it when strength drives the design, or when the part sees heat.
Silicon Steel Annealed vs Silicon Steel Hot Rolled: 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.
Silicon Steel AnnealedSilicon Steel Hot Rolled
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Density
Same in both: Melting Point (Solidus) 1,500°C2,732 °F · Liquidus Temperature 1,520°C2,768 °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 250 J/g107 BTU/lb · Min Service Temperature -60°C-76 °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) -0.6 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 50 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 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.
Silicon Steel Annealed vs Silicon Steel Hot Rolled — frequently asked
Is Silicon Steel Hot Rolled stronger than Silicon Steel Annealed?
Yes. Silicon Steel Hot Rolled has a typical tensile strength of 500 MPa (72.5 ksi) against 460 MPa (66.7 ksi) for Silicon Steel Annealed — about 9% more.
Which condition does FabDigit quote by default, Annealed or Hot Rolled?
Annealed is the default Silicon Steel 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, Silicon Steel Annealed or Silicon Steel Hot Rolled?
Silicon Steel Hot Rolled, by a small margin. Both rate fair for machinability — 45/100 against 38/100 for Silicon Steel Annealed; for welding the order is Silicon Steel Hot Rolled first (good, 55/100) then Silicon Steel Annealed (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Silicon Steel Annealed and Silicon Steel Hot Rolled 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.