Steel A387 Gr 22 N&T vs A387 Gr 22 Q&T
Steel · A387 Gr 22 temper comparison
A387 Gr 22 N&T and A387 Gr 22 Q&T are two conditions of the same steel grade, A387 Gr 22: N&T (normalized and tempered) versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A387 Gr 22 Q&T is the stronger of the two: yield strength 460 MPa (66.7 ksi) against 385 MPa (55.8 ksi) for A387 Gr 22 N&T, about 19% more; tensile strength follows at 620 MPa (89.9 ksi) vs 570 MPa (82.7 ksi). A387 Gr 22 Q&T is harder — 200 HB against 180 HB for A387 Gr 22 N&T — which matters for wear surfaces and threads.
A387 Gr 22 Q&TChoose it when strength drives the design, or when surface hardness matters.
A387 Gr 22 N&T vs A387 Gr 22 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
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 385 MPa55.8 ksi · Shear Strength 350 MPa50.8 ksi · Hardness, Rockwell B 89 HRB · Hardness, Vickers 190 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 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.
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) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 550°C1,022 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.3×10⁻⁷ Ω·m9.06 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 16 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Same in both: Machinability 50 / 100 · Weldability 55 / 100 · Formability (cold) 50 / 100 · Brazeability / Solderability 45 / 100 · Polishability 45 / 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 60 L/kg7.2 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.
A387 Gr 22 N&T vs A387 Gr 22 Q&T — frequently asked
Is A387 Gr 22 Q&T stronger than A387 Gr 22 N&T?
Yes. A387 Gr 22 Q&T has a typical yield strength of 460 MPa (66.7 ksi) against 385 MPa (55.8 ksi) for A387 Gr 22 N&T — about 19% more. Tensile strength is 620 MPa (89.9 ksi) vs 570 MPa (82.7 ksi).
Which condition does FabDigit quote by default, N&T or Q&T?
N&T is the default A387 Gr 22 condition in the FabDigit quote flow. 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 A387 Gr 22 N&T over A387 Gr 22 Q&T?
Pick A387 Gr 22 Q&T when strength drives the design, or when surface hardness matters.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A387 Gr 22 N&T and A387 Gr 22 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.