Steel H25-HR vs H25 HT46-48
Steel · H25 temper comparison
H25-HR and H25 HT46-48 are two conditions of the same steel grade, H25: HR (hot rolled) versus HT46-48 (hardened & tempered to 46–48 HRC). The chemistry is identical, so every difference below comes from the condition. H25 HT46-48 is the stronger of the two: yield strength 1,330 MPa (193 ksi) against 800 MPa (116 ksi) for H25-HR, about 66% more; tensile strength follows at 1,550 MPa (225 ksi) vs 1,000 MPa (145 ksi). In exchange, H25-HR is the more ductile: elongation 12% versus 6% for H25 HT46-48, and H25-HR is harder (300 HB vs 217 HB). H25 HT46-48 runs hotter in service (620°C vs 500°C continuous). On the shop floor, H25-HR machines more easily (poor vs not recommended) and H25 HT46-48 welds better (25 vs 15 out of 100).
H25-HRChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
H25 HT46-48Choose it when strength drives the design, or when the part sees heat.
H25-HR vs H25 HT46-48: 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 215 GPa31.2 Msi · 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.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 15 / 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 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-HR vs H25 HT46-48 — frequently asked
Is H25 HT46-48 stronger than H25-HR?
Yes. H25 HT46-48 has a typical yield strength of 1,330 MPa (193 ksi) against 800 MPa (116 ksi) for H25-HR — about 66% more. Tensile strength is 1,550 MPa (225 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, HR or HT46-48?
ANN is the default H25 condition in the FabDigit quote flow (neither HR nor HT46-48). 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-HR or H25 HT46-48?
H25-HR. Its machinability rates poor (20/100) against not recommended (10/100) for H25 HT46-48; for welding the order is H25 HT46-48 first (poor, 25/100) then H25-HR (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in H25-HR and H25 HT46-48 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.