Steel A283 Annealed vs A283 Q&T
Steel · A283 temper comparison
A283 Annealed and A283 Q&T are two conditions of the same steel grade, A283: Annealed versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A283 Q&T is the stronger of the two: yield strength 370 MPa (53.7 ksi) against 210 MPa (30.5 ksi) for A283 Annealed, about 76% more; tensile strength follows at 520 MPa (75.4 ksi) vs 390 MPa (56.6 ksi). In exchange, A283 Annealed is the more ductile: elongation 30% versus 22% for A283 Q&T, and A283 Q&T is harder (155 HB vs 110 HB).
A283 AnnealedChoose it when the part is bent, formed or impact-loaded.
A283 Q&TChoose it when strength drives the design.
A283 Annealed vs A283 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,510°C2,750 °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 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.7 µm/m·K6.5 µin/in·°F · Latent Heat of Fusion 247 J/g106 BTU/lb · Min Service Temperature -20°C-4 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.65 V
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 70 / 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) 1.9 kg CO₂/kg · Embodied Water 40 L/kg4.8 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.
A283 Annealed vs A283 Q&T — frequently asked
Is A283 Q&T stronger than A283 Annealed?
Yes. A283 Q&T has a typical yield strength of 370 MPa (53.7 ksi) against 210 MPa (30.5 ksi) for A283 Annealed — about 76% more. Tensile strength is 520 MPa (75.4 ksi) vs 390 MPa (56.6 ksi).
Which condition does FabDigit quote by default, Annealed or Q&T?
HR is the default A283 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, A283 Annealed or A283 Q&T?
A283 Annealed, by a small margin. Both rate good for machinability — 66/100 against 57/100 for A283 Q&T; for welding the order is A283 Annealed first (excellent, 96/100) then A283 Q&T (excellent, 88/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A283 Annealed and A283 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.