Steel A11 H&T 62-64 HRC vs A11 Hardened & Tempered
Steel · A11 temper comparison
A11 H&T 62-64 HRC and A11 Hardened & Tempered are two conditions of the same steel grade, A11: H&T 62-64 HRC (hardened & Tempered) versus Hardened & Tempered (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A11 H&T 62-64 HRC is the stronger of the two: yield strength 2,000 MPa (290 ksi) against 600 MPa (87 ksi) for A11 Hardened & Tempered, about 3.3 times as much. In exchange, A11 Hardened & Tempered is the more ductile: elongation 8% versus 0.5% for A11 H&T 62-64 HRC, and A11 H&T 62-64 HRC is harder (790 HV vs 730 HV). A11 H&T 62-64 HRC runs hotter in service (480°C vs 425°C continuous). On the shop floor, A11 Hardened & Tempered welds better (poor vs not recommended).
A11 H&T 62-64 HRCChoose it when strength drives the design, or when the part sees heat.
A11 Hardened & TemperedChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
A11 H&T 62-64 HRC vs A11 Hardened & Tempered: 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.
A11 H&T 62-64 HRCA11 Hardened & Tempered
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, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 221 GPa32.1 Msi · Shear Modulus 85 GPa12.3 Msi · Poisson's Ratio 0.29 · Hardness, Brinell 269 HB · Hardness, Rockwell B 103 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.41 g/cm³0.27 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.6 µm/m·K5.9 µin/in·°F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
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: Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · 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.
A11 H&T 62-64 HRC vs A11 Hardened & Tempered — frequently asked
Is A11 H&T 62-64 HRC stronger than A11 Hardened & Tempered?
Yes. A11 H&T 62-64 HRC has a typical yield strength of 2,000 MPa (290 ksi) against 600 MPa (87 ksi) for A11 Hardened & Tempered — about 3.3 times as much. Tensile strength is 2,200 MPa (319 ksi) vs 2,100 MPa (305 ksi).
Which condition does FabDigit quote by default, H&T 62-64 HRC or Hardened & Tempered?
Annealed is the default A11 condition in the FabDigit quote flow (neither H&T 62-64 HRC nor Hardened & Tempered). 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 welds better, A11 H&T 62-64 HRC or A11 Hardened & Tempered?
A11 Hardened & Tempered. Its weldability rates poor (15/100) against not recommended (5/100) for A11 H&T 62-64 HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A11 H&T 62-64 HRC and A11 Hardened & Tempered 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.