Steel A352 Grade LC4 N+T+SR vs A352 Grade LC4 Q+T
Steel · A352 Grade LC4 temper comparison
A352 Grade LC4 N+T+SR and A352 Grade LC4 Q+T are two conditions of the same steel grade, A352 Grade LC4: N+T+SR (normalized, tempered and post-weld stress relieved) versus Q+T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. A352 Grade LC4 Q+T is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 320 MPa (46.4 ksi) for A352 Grade LC4 N+T+SR, about 19% more; tensile strength follows at 585 MPa (84.8 ksi) vs 525 MPa (76.1 ksi). A352 Grade LC4 Q+T is harder — 185 HB against 165 HB for A352 Grade LC4 N+T+SR — which matters for wear surfaces and threads.
A352 Grade LC4 Q+TChoose it when strength drives the design, or when surface hardness matters.
A352 Grade LC4 N+T+SR vs A352 Grade LC4 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 LC4 N+T+SRA352 Grade LC4 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 200 GPa29 Msi · Shear Modulus 78 GPa11.3 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 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.3 µm/m·K6.3 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 340°C644 °F · Min Service Temperature -115°C-175 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 3.5×10⁻⁷ Ω·m13.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 15 / 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 70 / 100 · Brazeability / Solderability 55 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 33 MJ/kg14,187 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 45 L/kg5.4 gal/lb · Typical Recycled Content 75%
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 LC4 N+T+SR vs A352 Grade LC4 Q+T — frequently asked
Is A352 Grade LC4 Q+T stronger than A352 Grade LC4 N+T+SR?
Yes. A352 Grade LC4 Q+T has a typical yield strength of 380 MPa (55.1 ksi) against 320 MPa (46.4 ksi) for A352 Grade LC4 N+T+SR — about 19% more. Tensile strength is 585 MPa (84.8 ksi) vs 525 MPa (76.1 ksi).
Which condition does FabDigit quote by default, N+T+SR or Q+T?
N+T is the default A352 Grade LC4 condition in the FabDigit quote flow (neither N+T+SR 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 LC4 N+T+SR or A352 Grade LC4 Q+T?
A352 Grade LC4 N+T+SR. Its machinability rates good (57/100) against fair (52/100) for A352 Grade LC4 Q+T; for welding the order is A352 Grade LC4 N+T+SR first (good, 63/100) then A352 Grade LC4 Q+T (good, 58/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A352 Grade LC4 N+T+SR and A352 Grade LC4 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.