Steel H25-AQ vs H25-HR
Steel · H25 temper comparison
H25-AQ and H25-HR are two conditions of the same steel grade, H25: AQ (as-quenched) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. H25-AQ is the stronger of the two: yield strength 1,600 MPa (232 ksi) against 800 MPa (116 ksi) for H25-HR, about 100% more; tensile strength follows at 1,960 MPa (284 ksi) vs 1,000 MPa (145 ksi). In exchange, H25-HR is the more ductile: elongation 12% versus 1% for H25-AQ, and H25-AQ is harder (560 HB vs 300 HB). H25-HR runs hotter in service (500°C vs 200°C continuous). On the shop floor, H25-HR machines more easily (poor vs not recommended) and H25-HR welds better (poor vs not recommended).
H25-AQChoose it when strength drives the design.
H25-HRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
H25-AQ vs H25-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.
Elastic (Young's) Modulus
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: Shear Modulus 83 GPa12 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29 · Hardness, Rockwell B 96 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.55 g/cm³0.31 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,455°C2,651 °F
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) 11.3 µm/m·K6.3 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V
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 30 / 100 · Brazeability / Solderability 35 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 62 MJ/kg26,655 BTU/lb · Embodied Carbon (primary production) 4.2 kg CO₂/kg · Embodied Water 70 L/kg8.4 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.
H25-AQ vs H25-HR — frequently asked
Is H25-AQ stronger than H25-HR?
Yes. H25-AQ has a typical yield strength of 1,600 MPa (232 ksi) against 800 MPa (116 ksi) for H25-HR — about 100% more. Tensile strength is 1,960 MPa (284 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, AQ or HR?
ANN is the default H25 condition in the FabDigit quote flow (neither AQ nor HR). 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, H25-AQ or H25-HR?
H25-HR. Its machinability rates poor (20/100) against not recommended (5/100) for H25-AQ; for welding the order is H25-HR first (poor, 15/100) then H25-AQ (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in H25-AQ and H25-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.