Steel H14-ANN vs H14 QT52-56HRC
Steel · H14 temper comparison
H14-ANN and H14 QT52-56HRC are two conditions of the same steel grade, H14: ANN (annealed) versus QT52-56HRC (hardened & tempered 52–56 HRC). The chemistry is identical, so every difference below comes from the condition. H14 QT52-56HRC is the stronger of the two: yield strength 1,650 MPa (239 ksi) against 450 MPa (65.3 ksi) for H14-ANN, about 3.7 times as much; tensile strength follows at 1,950 MPa (283 ksi) vs 760 MPa (110 ksi). In exchange, H14-ANN is the more ductile: elongation 20% versus 5% for H14 QT52-56HRC, and H14 QT52-56HRC is harder (600 HV vs 225 HV). H14 QT52-56HRC runs hotter in service (540°C vs 480°C continuous). On the shop floor, H14-ANN machines more easily (fair vs not recommended).
H14-ANNChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
H14 QT52-56HRCChoose it when strength drives the design, or when the part sees heat.
H14-ANN vs H14 QT52-56HRC: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 175 GPa25.4 Msi · Poisson's Ratio 0.3 · Shear Strength 500 MPa72.5 ksi · Hardness, Brinell 215 HB · Hardness, Rockwell B 96 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.8 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,480°C2,696 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 27 W/m·K15.6 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 -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.2 % IACS · Electrical Resistivity 5.4×10⁻⁷ Ω·m21.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.55 V · Corrosion Resistance 18 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 30 / 100 · Formability (cold) 35 / 100 · Brazeability / Solderability 35 / 100 · Polishability 65 / 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 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.
H14-ANN vs H14 QT52-56HRC — frequently asked
Is H14 QT52-56HRC stronger than H14-ANN?
Yes. H14 QT52-56HRC has a typical yield strength of 1,650 MPa (239 ksi) against 450 MPa (65.3 ksi) for H14-ANN — about 3.7 times as much. Tensile strength is 1,950 MPa (283 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, ANN or QT52-56HRC?
ANN is the default H14 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, H14-ANN or H14 QT52-56HRC?
H14-ANN. Its machinability rates fair (45/100) against not recommended (6/100) for H14 QT52-56HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in H14-ANN and H14 QT52-56HRC 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.