Steel 9310 Annealed vs 9310 Q&T
Steel · 9310 temper comparison
9310 Annealed and 9310 Q&T are two conditions of the same steel grade, 9310: Annealed versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 9310 Q&T is the stronger of the two: yield strength 1,100 MPa (160 ksi) against 450 MPa (65.3 ksi) for 9310 Annealed, about 144% more; tensile strength follows at 1,300 MPa (189 ksi) vs 820 MPa (119 ksi). In exchange, 9310 Annealed is the more ductile: elongation 17% versus 14% for 9310 Q&T, and 9310 Q&T is harder (363 HB vs 235 HB). 9310 Annealed runs hotter in service (400°C vs 300°C continuous). On the shop floor, 9310 Annealed machines more easily (fair vs poor) and 9310 Annealed welds better (fair vs poor).
9310 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
9310 Q&TChoose it when strength drives the design.
9310 Annealed vs 9310 Q&T: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
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 · Hardness, Rockwell B 98 HRB · 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.
Max Service Temperature (continuous)
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 · 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 Q&T — frequently asked
Is 9310 Q&T stronger than 9310 Annealed?
Yes. 9310 Q&T has a typical yield strength of 1,100 MPa (160 ksi) against 450 MPa (65.3 ksi) for 9310 Annealed — about 144% more. Tensile strength is 1,300 MPa (189 ksi) vs 820 MPa (119 ksi).
Which condition does FabDigit quote by default, Annealed or Q&T?
HR is the default 9310 condition in the FabDigit quote flow (neither Annealed nor Q&T). 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 Q&T?
9310 Annealed. Its machinability rates fair (45/100) against poor (25/100) for 9310 Q&T; for welding the order is 9310 Annealed first (fair, 40/100) then 9310 Q&T (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 9310 Annealed and 9310 Q&T 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.