Steel H26-HR vs H26-SR
Steel · H26 temper comparison
H26-HR and H26-SR are two conditions of the same steel grade, H26: HR (hot rolled) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. H26-HR is the stronger of the two: yield strength 760 MPa (110 ksi) against 575 MPa (83.4 ksi) for H26-SR, about 32% more; tensile strength follows at 1,100 MPa (160 ksi) vs 860 MPa (125 ksi). In exchange, H26-SR is the more ductile: elongation 17% versus 8% for H26-HR, and H26-HR is harder (330 HB vs 235 HB). On the shop floor, H26-SR machines more easily (30 vs 18 out of 100).
H26-HRChoose it when strength drives the design.
H26-SRChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
H26-HR vs H26-SR: 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
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.89 g/cm³0.32 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °F · Liquidus Temperature 1,460°C2,660 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.2 µm/m·K6.2 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.1 % IACS · Electrical Resistivity 5.5×10⁻⁷ Ω·m21.7 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: 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 25 / 100 · Brazeability / Solderability 35 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 48 MJ/kg20,636 BTU/lb · Embodied Carbon (primary production) 3.6 kg CO₂/kg · Embodied Water 80 L/kg9.6 gal/lb · Typical Recycled Content 45%
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.
H26-HR vs H26-SR — frequently asked
Is H26-HR stronger than H26-SR?
Yes. H26-HR has a typical yield strength of 760 MPa (110 ksi) against 575 MPa (83.4 ksi) for H26-SR — about 32% more. Tensile strength is 1,100 MPa (160 ksi) vs 860 MPa (125 ksi).
Which condition does FabDigit quote by default, HR or SR?
ANN is the default H26 condition in the FabDigit quote flow (neither HR nor SR). 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, H26-HR or H26-SR?
H26-SR, by a small margin. Both rate poor for machinability — 30/100 against 18/100 for H26-HR; for welding the order is H26-SR first (poor, 20/100) then H26-HR (not recommended, 12/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in H26-HR and H26-SR 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.