Steel 1146 Annealed vs 1146 Q&T
Steel · 1146 temper comparison
1146 Annealed and 1146 Q&T are two conditions of the same steel grade, 1146: Annealed versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. 1146 Q&T is the stronger of the two: yield strength 590 MPa (85.6 ksi) against 300 MPa (43.5 ksi) for 1146 Annealed, about 97% more; tensile strength follows at 790 MPa (115 ksi) vs 550 MPa (79.8 ksi). In exchange, 1146 Annealed is the more ductile: elongation 24% versus 17% for 1146 Q&T, and 1146 Q&T is harder (235 HB vs 156 HB).
1146 AnnealedChoose it when the part is bent, formed or impact-loaded.
1146 Q&TChoose it when strength drives the design.
1146 Annealed vs 1146 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Reduction in Area 45%
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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 486 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 10 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 10 / 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 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 35 L/kg4.2 gal/lb · Typical Recycled Content 30%
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.
1146 Annealed vs 1146 Q&T — frequently asked
Is 1146 Q&T stronger than 1146 Annealed?
Yes. 1146 Q&T has a typical yield strength of 590 MPa (85.6 ksi) against 300 MPa (43.5 ksi) for 1146 Annealed — about 97% more. Tensile strength is 790 MPa (115 ksi) vs 550 MPa (79.8 ksi).
Which condition does FabDigit quote by default, Annealed or Q&T?
HR is the default 1146 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.
When should I choose 1146 Annealed over 1146 Q&T?
Pick 1146 Annealed when the part is bent, formed or impact-loaded. Pick 1146 Q&T when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1146 Annealed and 1146 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.