Steel A5-ANN vs A5 HT 57-59 HRC
Steel · A5 temper comparison
A5-ANN and A5 HT 57-59 HRC are two conditions of the same steel grade, A5: ANN (annealed) versus HT 57-59 HRC (hardened + tempered 260–315 °C). The chemistry is identical, so every difference below comes from the condition. A5 HT 57-59 HRC is the stronger of the two: yield strength 1,720 MPa (249 ksi) against 435 MPa (63.1 ksi) for A5-ANN, about 4.0 times as much; tensile strength follows at 1,980 MPa (287 ksi) vs 745 MPa (108 ksi). In exchange, A5-ANN is the more ductile: elongation 22% versus 2% for A5 HT 57-59 HRC, and A5 HT 57-59 HRC is harder (660 HV vs 235 HV). A5 HT 57-59 HRC runs hotter in service (220°C vs 200°C continuous). On the shop floor, A5-ANN machines more easily (fair vs not recommended).
A5-ANNChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
A5 HT 57-59 HRCChoose it when strength drives the design, or when the part sees heat.
A5-ANN vs A5 HT 57-59 HRC: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 203 GPa29.4 Msi · Shear Modulus 78 GPa11.3 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Reduction in Area 45% · Hardness, Brinell 225 HB · Hardness, Rockwell B 98 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.86 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,460°C2,660 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 25 W/m·K14.4 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.7 % IACS · Electrical Resistivity 6.5×10⁻⁷ Ω·m25.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 13 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 50% · Weldability 20 / 100 · Formability (cold) 22 / 100 · Brazeability / Solderability 35 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 80 L/kg9.6 gal/lb · Typical Recycled Content 40%
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.
A5-ANN vs A5 HT 57-59 HRC — frequently asked
Is A5 HT 57-59 HRC stronger than A5-ANN?
Yes. A5 HT 57-59 HRC has a typical yield strength of 1,720 MPa (249 ksi) against 435 MPa (63.1 ksi) for A5-ANN — about 4.0 times as much. Tensile strength is 1,980 MPa (287 ksi) vs 745 MPa (108 ksi).
Which condition does FabDigit quote by default, ANN or HT 57-59 HRC?
ANN is the default A5 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, A5-ANN or A5 HT 57-59 HRC?
A5-ANN. Its machinability rates fair (45/100) against not recommended (10/100) for A5 HT 57-59 HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A5-ANN and A5 HT 57-59 HRC 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.