Steel A369 FP92-AF vs A369 FP92-ANN
Steel · A369 FP92 temper comparison
A369 FP92-AF and A369 FP92-ANN are two conditions of the same steel grade, A369 FP92: AF (as-forged / as-quenched) versus ANN (annealed). The chemistry is identical, so every difference below comes from the condition. A369 FP92-AF is the stronger of the two: yield strength 950 MPa (138 ksi) against 400 MPa (58 ksi) for A369 FP92-ANN, about 138% more; tensile strength follows at 1,300 MPa (189 ksi) vs 600 MPa (87 ksi). In exchange, A369 FP92-ANN is the more ductile: elongation 26% versus 9% for A369 FP92-AF, and A369 FP92-AF is harder (400 HB vs 180 HB). A369 FP92-ANN runs hotter in service (400°C vs 200°C continuous) and A369 FP92-ANN conducts heat better (27 W/m·K vs 24 W/m·K). On the shop floor, A369 FP92-ANN machines more easily (fair vs poor) and A369 FP92-ANN welds better (fair vs not recommended).
A369 FP92-AFChoose it when strength drives the design.
A369 FP92-ANNChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
A369 FP92-AF vs A369 FP92-ANN: 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.
Elastic (Young's) Modulus
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 C
Hardness, Vickers
Same in both: Shear Modulus 84 GPa12.2 Msi · Bulk Modulus 170 GPa24.7 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.78 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 450 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.8 µm/m·K6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.45 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 30 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 70 L/kg8.4 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.
A369 FP92-AF vs A369 FP92-ANN — frequently asked
Is A369 FP92-AF stronger than A369 FP92-ANN?
Yes. A369 FP92-AF has a typical yield strength of 950 MPa (138 ksi) against 400 MPa (58 ksi) for A369 FP92-ANN — about 138% more. Tensile strength is 1,300 MPa (189 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, AF or ANN?
N+T is the default A369 FP92 condition in the FabDigit quote flow (neither AF nor ANN). 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, A369 FP92-AF or A369 FP92-ANN?
A369 FP92-ANN. Its machinability rates fair (50/100) against poor (15/100) for A369 FP92-AF; for welding the order is A369 FP92-ANN first (fair, 40/100) then A369 FP92-AF (not recommended, 10/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A369 FP92-AF and A369 FP92-ANN 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.