Steel A369 FP5 N+T vs A369 FP5 Q&T
Steel · A369 FP5 temper comparison
A369 FP5 N+T and A369 FP5 Q&T are two conditions of the same steel grade, A369 FP5: N+T (normalized and tempered) versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A369 FP5 Q&T is the stronger of the two: yield strength 480 MPa (69.6 ksi) against 400 MPa (58 ksi) for A369 FP5 N+T, about 20% more; tensile strength follows at 640 MPa (92.8 ksi) vs 585 MPa (84.8 ksi). In exchange, A369 FP5 N+T is the more ductile: elongation 24% versus 21% for A369 FP5 Q&T, and A369 FP5 Q&T is harder (195 HB vs 175 HB). On the shop floor, A369 FP5 N+T welds better (45 vs 35 out of 100).
A369 FP5 N+TChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
A369 FP5 Q&TChoose it when strength drives the design.
A369 FP5 N+T vs A369 FP5 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 213 GPa30.9 Msi · Shear Modulus 82 GPa11.9 Msi · Bulk Modulus 160 GPa23.2 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) 1,450°C2,642 °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 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12.2 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -29°C-20 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.58 V · Corrosion Resistance 30 / 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 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) 2.3 kg CO₂/kg · Embodied Water 55 L/kg6.6 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 FP5 N+T vs A369 FP5 Q&T — frequently asked
Is A369 FP5 Q&T stronger than A369 FP5 N+T?
Yes. A369 FP5 Q&T has a typical yield strength of 480 MPa (69.6 ksi) against 400 MPa (58 ksi) for A369 FP5 N+T — about 20% more. Tensile strength is 640 MPa (92.8 ksi) vs 585 MPa (84.8 ksi).
Which condition does FabDigit quote by default, N+T or Q&T?
Annealed is the default A369 FP5 condition in the FabDigit quote flow (neither N+T 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, A369 FP5 N+T or A369 FP5 Q&T?
A369 FP5 N+T, by a small margin. Both rate fair for machinability — 44/100 against 38/100 for A369 FP5 Q&T; for welding the order is A369 FP5 N+T first (fair, 45/100) then A369 FP5 Q&T (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A369 FP5 N+T and A369 FP5 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.