Steel A10-HR vs A10 HT-54-56HRC
Steel · A10 temper comparison
A10-HR and A10 HT-54-56HRC are two conditions of the same steel grade, A10: HR (hot rolled) versus HT-54-56HRC (hardened & tempered ~340–400 °C). The chemistry is identical, so every difference below comes from the condition. A10 HT-54-56HRC is the stronger of the two: yield strength 1,550 MPa (225 ksi) against 620 MPa (89.9 ksi) for A10-HR, about 150% more; tensile strength follows at 1,800 MPa (261 ksi) vs 950 MPa (138 ksi). In exchange, A10-HR is the more ductile: elongation 10% versus 5% for A10 HT-54-56HRC, and A10-HR is harder (300 HB vs 229 HB). A10-HR runs hotter in service (400°C vs 300°C continuous). On the shop floor, A10-HR machines more easily (fair vs poor).
A10-HRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
A10 HT-54-56HRCChoose it when strength drives the design.
A10-HR vs A10 HT-54-56HRC: 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 190 GPa27.6 Msi · Shear Modulus 74 GPa10.7 Msi · Bulk Modulus 158 GPa22.9 Msi · Poisson's Ratio 0.28 · Hardness, Rockwell B 98 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.34 g/cm³0.27 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 30 W/m·K17.3 BTU/hr·ft·°F · Specific Heat Capacity 460 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 -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3 % IACS · Electrical Resistivity 5.8×10⁻⁷ Ω·m22.8 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 %)
Weldability
Formability (cold)
Same in both: Castability 25 / 100 · Brazeability / Solderability 35 / 100 · Polishability 40 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 36 MJ/kg15,477 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 65 L/kg7.8 gal/lb · Typical Recycled Content 35%
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.
A10-HR vs A10 HT-54-56HRC — frequently asked
Is A10 HT-54-56HRC stronger than A10-HR?
Yes. A10 HT-54-56HRC has a typical yield strength of 1,550 MPa (225 ksi) against 620 MPa (89.9 ksi) for A10-HR — about 150% more. Tensile strength is 1,800 MPa (261 ksi) vs 950 MPa (138 ksi).
Which condition does FabDigit quote by default, HR or HT-54-56HRC?
ANN is the default A10 condition in the FabDigit quote flow (neither HR nor HT-54-56HRC). 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, A10-HR or A10 HT-54-56HRC?
A10-HR. Its machinability rates fair (40/100) against poor (22/100) for A10 HT-54-56HRC; for welding the order is A10 HT-54-56HRC first (poor, 15/100) then A10-HR (not recommended, 10/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A10-HR and A10 HT-54-56HRC 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.