Steel Hardox 450 Q&T vs Hardox 450 Q&T THICK
Steel · Hardox 450 temper comparison
Hardox 450 Q&T and Hardox 450 Q&T THICK are two conditions of the same steel grade, Hardox 450: Q&T (quenched and tempered) versus Q&T THICK (Q&T thick plate). The chemistry is identical, so every difference below comes from the condition. Hardox 450 Q&T is the stronger of the two: yield strength 1,200 MPa (174 ksi) against 1,000 MPa (145 ksi) for Hardox 450 Q&T THICK, about 20% more; tensile strength follows at 1,400 MPa (203 ksi) vs 1,250 MPa (181 ksi). On the shop floor, Hardox 450 Q&T forms better (fair vs poor).
Hardox 450 Q&TChoose it when strength drives the design.
Hardox 450 Q&T vs Hardox 450 Q&T THICK: 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.
Hardox 450 Q&THardox 450 Q&T THICK
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 210 GPa30.5 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 170 GPa24.7 Msi · Poisson's Ratio 0.3 · Elongation at Break 10% · Hardness, Brinell 450 HB · Hardness, Rockwell C 47 HRC
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,460°C2,660 °F · Liquidus Temperature 1,500°C2,732 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 38 W/m·K22 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) 250°C482 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7 % IACS · Electrical Resistivity 2.4×10⁻⁷ Ω·m9.45 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.62 V · Corrosion Resistance 12 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Weldability
Formability (cold)
Same in both: Machinability 22 / 100 · Machinability Rating (AISI 1212 = 100 %) 20% · Polishability 55 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.4 kg CO₂/kg · Embodied Water 45 L/kg5.4 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.
Hardox 450 Q&T vs Hardox 450 Q&T THICK — frequently asked
Is Hardox 450 Q&T stronger than Hardox 450 Q&T THICK?
Yes. Hardox 450 Q&T has a typical yield strength of 1,200 MPa (174 ksi) against 1,000 MPa (145 ksi) for Hardox 450 Q&T THICK — about 20% more. Tensile strength is 1,400 MPa (203 ksi) vs 1,250 MPa (181 ksi).
Which condition does FabDigit quote by default, Q&T or Q&T THICK?
Q&T is the default Hardox 450 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.
Which welds better, Hardox 450 Q&T or Hardox 450 Q&T THICK?
Hardox 450 Q&T. Its weldability rates good (55/100) against fair (48/100) for Hardox 450 Q&T THICK.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hardox 450 Q&T and Hardox 450 Q&T THICK 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.