Steel 50100-ANN vs 50100-HR
Steel · 50100 temper comparison
50100-ANN and 50100-HR are two conditions of the same steel grade, 50100: ANN (annealed) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 50100-HR is the stronger of the two: yield strength 490 MPa (71.1 ksi) against 390 MPa (56.6 ksi) for 50100-ANN, about 26% more; tensile strength follows at 850 MPa (123 ksi) vs 650 MPa (94.3 ksi). In exchange, 50100-ANN is the more ductile: elongation 25% versus 14% for 50100-HR, and 50100-HR is harder (255 HB vs 195 HB). On the shop floor, 50100-ANN machines more easily (fair vs poor).
50100-ANNChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
50100-HRChoose it when strength drives the design.
50100-ANN vs 50100-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)
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 7.81 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 46 W/m·K26.6 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.9 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 150°C302 °F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.8 % IACS · Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 µΩ·in
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 %)
Formability (cold)
Same in both: Weldability 12 / 100 · Brazeability / Solderability 40 / 100 · Polishability 88 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 33 MJ/kg14,187 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.
50100-ANN vs 50100-HR — frequently asked
Is 50100-HR stronger than 50100-ANN?
Yes. 50100-HR has a typical yield strength of 490 MPa (71.1 ksi) against 390 MPa (56.6 ksi) for 50100-ANN — about 26% more. Tensile strength is 850 MPa (123 ksi) vs 650 MPa (94.3 ksi).
Which condition does FabDigit quote by default, ANN or HR?
ANN is the default 50100 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, 50100-ANN or 50100-HR?
50100-ANN. Its machinability rates fair (45/100) against poor (33/100) for 50100-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 50100-ANN and 50100-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.