Steel 6152 Hardened & Tempered vs 6152 Hot Rolled
Steel · 6152 temper comparison
6152 Hardened & Tempered and 6152 Hot Rolled are two conditions of the same steel grade, 6152: Hardened & Tempered (quenched and tempered) versus Hot Rolled. The chemistry is identical, so every difference below comes from the condition. 6152 Hardened & Tempered is the stronger of the two: yield strength 1,450 MPa (210 ksi) against 550 MPa (79.8 ksi) for 6152 Hot Rolled, about 164% more; tensile strength follows at 1,620 MPa (235 ksi) vs 900 MPa (131 ksi). In exchange, 6152 Hot Rolled is the more ductile: elongation 18% versus 8% for 6152 Hardened & Tempered, and 6152 Hot Rolled is harder (255 HB vs 197 HB). On the shop floor, 6152 Hot Rolled machines more easily (fair vs poor) and 6152 Hot Rolled welds better (poor vs not recommended).
6152 Hardened & TemperedChoose it when strength drives the design.
6152 Hot RolledChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
6152 Hardened & Tempered vs 6152 Hot Rolled: 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.
6152 Hardened & Tempered6152 Hot Rolled
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
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
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °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) 12.3 µm/m·K6.8 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -40°C-40 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 7.5 % IACS · Electrical Resistivity 2.3×10⁻⁷ Ω·m9.06 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.61 V · Corrosion Resistance 13 / 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 30 / 100 · Brazeability / Solderability 55 / 100 · Polishability 60 / 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 55 L/kg6.6 gal/lb · Typical Recycled Content 35%
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.
6152 Hardened & Tempered vs 6152 Hot Rolled — frequently asked
Is 6152 Hardened & Tempered stronger than 6152 Hot Rolled?
Yes. 6152 Hardened & Tempered has a typical yield strength of 1,450 MPa (210 ksi) against 550 MPa (79.8 ksi) for 6152 Hot Rolled — about 164% more. Tensile strength is 1,620 MPa (235 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, Hardened & Tempered or Hot Rolled?
Annealed is the default 6152 condition in the FabDigit quote flow (neither Hardened & Tempered nor Hot Rolled). 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, 6152 Hardened & Tempered or 6152 Hot Rolled?
6152 Hot Rolled. Its machinability rates fair (42/100) against poor (18/100) for 6152 Hardened & Tempered; for welding the order is 6152 Hot Rolled first (poor, 22/100) then 6152 Hardened & Tempered (not recommended, 10/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 6152 Hardened & Tempered and 6152 Hot Rolled 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.