Steel A352 Grade LCC N+T+PWHT vs A352 Grade LCC Q+T
Steel · A352 Grade LCC temper comparison
A352 Grade LCC N+T+PWHT and A352 Grade LCC Q+T are two conditions of the same steel grade, A352 Grade LCC: N+T+PWHT (N+T + post-weld heat treated / stress relieved after weld repair) versus Q+T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A352 Grade LCC Q+T is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 305 MPa (44.2 ksi) for A352 Grade LCC N+T+PWHT, about 25% more; tensile strength follows at 560 MPa (81.2 ksi) vs 510 MPa (74 ksi). A352 Grade LCC Q+T is harder — 170 HB against 148 HB for A352 Grade LCC N+T+PWHT — which matters for wear surfaces and threads.
A352 Grade LCC Q+TChoose it when strength drives the design, or when surface hardness matters.
A352 Grade LCC N+T+PWHT vs A352 Grade LCC 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.
A352 Grade LCC N+T+PWHTA352 Grade LCC Q+T
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
Same in both: Elastic (Young's) Modulus 202 GPa29.3 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 1,505°C2,741 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 46 W/m·K26.6 BTU/hr·ft·°F · Specific Heat Capacity 470 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 12 µm/m·K6.7 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 425°C797 °F · Min Service Temperature -46°C-51 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1.8×10⁻⁷ Ω·m7.09 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 12 / 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: Castability 72 / 100 · Brazeability / Solderability 55 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 90%
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.
A352 Grade LCC N+T+PWHT vs A352 Grade LCC Q+T — frequently asked
Is A352 Grade LCC Q+T stronger than A352 Grade LCC N+T+PWHT?
Yes. A352 Grade LCC Q+T has a typical yield strength of 380 MPa (55.1 ksi) against 305 MPa (44.2 ksi) for A352 Grade LCC N+T+PWHT — about 25% more. Tensile strength is 560 MPa (81.2 ksi) vs 510 MPa (74 ksi).
Which condition does FabDigit quote by default, N+T+PWHT or Q+T?
N+T is the default A352 Grade LCC condition in the FabDigit quote flow (neither N+T+PWHT 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, A352 Grade LCC N+T+PWHT or A352 Grade LCC Q+T?
A352 Grade LCC N+T+PWHT. Its machinability rates good (60/100) against fair (54/100) for A352 Grade LCC Q+T.
Ready to make it?
Upload a CAD file and FabDigit prices the part in A352 Grade LCC N+T+PWHT and A352 Grade LCC 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.