Steel SUJ5-ANN vs SUJ5-HR
Steel · SUJ5 temper comparison
SUJ5-ANN and SUJ5-HR are two conditions of the same steel grade, SUJ5: ANN (annealed) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. SUJ5-HR is the stronger of the two: yield strength 560 MPa (81.2 ksi) against 410 MPa (59.5 ksi) for SUJ5-ANN, about 37% more; tensile strength follows at 950 MPa (138 ksi) vs 660 MPa (95.7 ksi). In exchange, SUJ5-ANN is the more ductile: elongation 22% versus 12% for SUJ5-HR, and SUJ5-HR is harder (300 HB vs 197 HB). SUJ5-ANN runs hotter in service (200°C vs 180°C continuous). On the shop floor, SUJ5-ANN machines more easily (fair vs poor).
SUJ5-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
SUJ5-HRChoose it when strength drives the design.
SUJ5-ANN vs SUJ5-HR: 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)
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 · Hardness, Rockwell B 92 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.81 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,455°C2,651 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.5 µm/m·K6.9 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -40°C-40 °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) -0.6 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: Castability 25 / 100 · Brazeability / Solderability 30 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 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.
SUJ5-ANN vs SUJ5-HR — frequently asked
Is SUJ5-HR stronger than SUJ5-ANN?
Yes. SUJ5-HR has a typical yield strength of 560 MPa (81.2 ksi) against 410 MPa (59.5 ksi) for SUJ5-ANN — about 37% more. Tensile strength is 950 MPa (138 ksi) vs 660 MPa (95.7 ksi).
Which condition does FabDigit quote by default, ANN or HR?
ANN is the default SUJ5 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, SUJ5-ANN or SUJ5-HR?
SUJ5-ANN. Its machinability rates fair (40/100) against poor (20/100) for SUJ5-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in SUJ5-ANN and SUJ5-HR 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.