Steel A182 F5a-A vs A182 F5a Q+T
Steel · A182 F5a temper comparison
A182 F5a-A and A182 F5a Q+T are two conditions of the same steel grade, A182 F5a: A (solution annealed) versus Q+T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A182 F5a Q+T is the stronger of the two: yield strength 585 MPa (84.8 ksi) against 390 MPa (56.6 ksi) for A182 F5a-A, about 50% more; tensile strength follows at 760 MPa (110 ksi) vs 600 MPa (87 ksi). In exchange, A182 F5a-A is the more ductile: elongation 27% versus 22% for A182 F5a Q+T, and A182 F5a Q+T is harder (235 HB vs 180 HB). On the shop floor, A182 F5a-A machines more easily (good vs fair).
A182 F5a-AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
A182 F5a Q+TChoose it when strength drives the design.
A182 F5a-A vs A182 F5a 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
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 207 GPa30 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 480 MPa69.6 ksi · Shear Strength 450 MPa65.3 ksi · Hardness, Vickers 225 HV
Physical
Density and transition temperatures.
Same in both: Density 7.78 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,450°C2,642 °F · Liquidus Temperature 1,505°C2,741 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 36 W/m·K20.8 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.8 µm/m·K6.6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 600°C1,112 °F · Min Service Temperature -29°C-20 °F
Electrical
Conductivity and insulation.
Same in both: 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 25 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 40 / 100 · Brazeability / Solderability 45 / 100 · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 32 MJ/kg13,758 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 60 L/kg7.2 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.
A182 F5a-A vs A182 F5a Q+T — frequently asked
Is A182 F5a Q+T stronger than A182 F5a-A?
Yes. A182 F5a Q+T has a typical yield strength of 585 MPa (84.8 ksi) against 390 MPa (56.6 ksi) for A182 F5a-A — about 50% more. Tensile strength is 760 MPa (110 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, A or Q+T?
N+T is the default A182 F5a condition in the FabDigit quote flow (neither A 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, A182 F5a-A or A182 F5a Q+T?
A182 F5a-A. Its machinability rates good (55/100) against fair (42/100) for A182 F5a Q+T.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A182 F5a-A and A182 F5a 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.