Steel 1.2379 Q&T 56-58 HRC vs 1.2379 Q&T 60-62 HRC
Steel · 1.2379 temper comparison
1.2379 Q&T 56-58 HRC and 1.2379 Q&T 60-62 HRC are two conditions of the same steel grade, 1.2379: Q&T 56-58 HRC (hardened, tempered ~300–350 °C) versus Q&T 60-62 HRC (hardened ~1020–1040 °C, tempered 180–200 °C). The chemistry is identical, so every difference below comes from the condition. 1.2379 Q&T 56-58 HRC is the stronger of the two: yield strength 1,550 MPa (225 ksi) against 480 MPa (69.6 ksi) for 1.2379 Q&T 60-62 HRC, about 3.2 times as much. 1.2379 Q&T 56-58 HRC is the more ductile: elongation 1.5% versus 0% for 1.2379 Q&T 60-62 HRC, and 1.2379 Q&T 56-58 HRC is harder (595 HB vs 235 HB). 1.2379 Q&T 56-58 HRC runs hotter in service (300°C vs 180°C continuous).
1.2379 Q&T 56-58 HRCChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
1.2379 Q&T 56-58 HRC vs 1.2379 Q&T 60-62 HRC: 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.
1.2379 Q&T 56-58 HRC1.2379 Q&T 60-62 HRC
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Vickers
Same in both: Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 7.7 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 20 W/m·K11.6 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.9 µm/m·K6.1 µin/in·°F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.35 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 20 / 100 · Brazeability / Solderability 35 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 36 MJ/kg15,477 BTU/lb · Embodied Carbon (primary production) 2.6 kg CO₂/kg · Embodied Water 65 L/kg7.8 gal/lb · Typical Recycled Content 40%
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.
1.2379 Q&T 56-58 HRC vs 1.2379 Q&T 60-62 HRC — frequently asked
Is 1.2379 Q&T 56-58 HRC stronger than 1.2379 Q&T 60-62 HRC?
Yes. 1.2379 Q&T 56-58 HRC has a typical yield strength of 1,550 MPa (225 ksi) against 480 MPa (69.6 ksi) for 1.2379 Q&T 60-62 HRC — about 3.2 times as much. Tensile strength is 1,800 MPa (261 ksi) vs 2,100 MPa (305 ksi).
Which condition does FabDigit quote by default, Q&T 56-58 HRC or Q&T 60-62 HRC?
Annealed is the default 1.2379 condition in the FabDigit quote flow (neither Q&T 56-58 HRC nor Q&T 60-62 HRC). 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, 1.2379 Q&T 56-58 HRC or 1.2379 Q&T 60-62 HRC?
1.2379 Q&T 60-62 HRC. Its weldability rates poor (15/100) against not recommended (8/100) for 1.2379 Q&T 56-58 HRC.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.2379 Q&T 56-58 HRC and 1.2379 Q&T 60-62 HRC 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.