Steel 9310 Annealed vs 9310-HR
Steel · 9310 temper comparison
9310 Annealed and 9310-HR are two conditions of the same steel grade, 9310: Annealed versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 9310-HR is the stronger of the two: yield strength 600 MPa (87 ksi) against 450 MPa (65.3 ksi) for 9310 Annealed, about 33% more; tensile strength follows at 950 MPa (138 ksi) vs 820 MPa (119 ksi). In exchange, 9310 Annealed is the more ductile: elongation 17% versus 15% for 9310-HR, and 9310-HR is harder (270 HB vs 235 HB).
9310 AnnealedChoose it when the part is bent, formed or impact-loaded.
9310-HRChoose it when strength drives the design.
9310 Annealed vs 9310-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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 205 GPa29.7 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 620 MPa89.9 ksi · Shear Strength 590 MPa85.6 ksi · Fracture Toughness (K_IC) 95 MPa·√m86.5 ksi·√in · Hardness, Rockwell B 98 HRB · Hardness, Rockwell C 27 HRC · Hardness, Vickers 284 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 34 W/m·K19.6 BTU/hr·ft·°F · Specific Heat Capacity 475 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.6 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -90°C-130 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 6.6 % IACS · Electrical Resistivity 2.6×10⁻⁷ Ω·m10.2 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 14 / 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: Brazeability / Solderability 55 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.5 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.
9310 Annealed vs 9310-HR — frequently asked
Is 9310-HR stronger than 9310 Annealed?
Yes. 9310-HR has a typical yield strength of 600 MPa (87 ksi) against 450 MPa (65.3 ksi) for 9310 Annealed — about 33% more. Tensile strength is 950 MPa (138 ksi) vs 820 MPa (119 ksi).
Which condition does FabDigit quote by default, Annealed or HR?
HR is the default 9310 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, 9310 Annealed or 9310-HR?
9310 Annealed, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for 9310-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 9310 Annealed and 9310-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.