Steel 60SiCr8-HR vs 60SiCr8 QT-44
Steel · 60SiCr8 temper comparison
60SiCr8-HR and 60SiCr8 QT-44 are two conditions of the same steel grade, 60SiCr8: HR (hot rolled) versus QT-44 (Q&T 42–46 HRC). The chemistry is identical, so every difference below comes from the condition. 60SiCr8 QT-44 is the stronger of the two: yield strength 1,300 MPa (189 ksi) against 650 MPa (94.3 ksi) for 60SiCr8-HR, about 100% more; tensile strength follows at 1,450 MPa (210 ksi) vs 1,050 MPa (152 ksi). 60SiCr8 QT-44 is harder — 410 HB against 300 HB for 60SiCr8-HR — which matters for wear surfaces and threads. 60SiCr8-HR runs hotter in service (350°C vs 280°C continuous). On the shop floor, 60SiCr8-HR machines more easily (fair vs poor) and 60SiCr8-HR forms better (poor vs not recommended).
60SiCr8-HRChoose it when the part sees heat, or when the part is machined in volume.
60SiCr8 QT-44Choose it when strength drives the design, or when surface hardness matters.
60SiCr8-HR vs 60SiCr8 QT-44: 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
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 206 GPa29.9 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) 1,420°C2,588 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 475 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11.5 µm/m·K6.4 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 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: Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 30 MJ/kg12,898 BTU/lb · Embodied Carbon (primary production) 2.1 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 30%
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.
60SiCr8-HR vs 60SiCr8 QT-44 — frequently asked
Is 60SiCr8 QT-44 stronger than 60SiCr8-HR?
Yes. 60SiCr8 QT-44 has a typical yield strength of 1,300 MPa (189 ksi) against 650 MPa (94.3 ksi) for 60SiCr8-HR — about 100% more. Tensile strength is 1,450 MPa (210 ksi) vs 1,050 MPa (152 ksi).
Which condition does FabDigit quote by default, HR or QT-44?
QT-48 is the default 60SiCr8 condition in the FabDigit quote flow (neither HR nor QT-44). 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, 60SiCr8-HR or 60SiCr8 QT-44?
60SiCr8-HR. Its machinability rates fair (38/100) against poor (20/100) for 60SiCr8 QT-44; for welding the order is 60SiCr8-HR first (poor, 20/100) then 60SiCr8 QT-44 (not recommended, 12/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 60SiCr8-HR and 60SiCr8 QT-44 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.