Steel 80MoCrV42-16-A vs 80MoCrV42-16-QT58
Steel · 80MoCrV42-16 temper comparison
80MoCrV42-16-A and 80MoCrV42-16-QT58 are two conditions of the same steel grade, 80MoCrV42-16: A (solution annealed) versus QT58 (QT 58-60 HRC). The chemistry is identical, so every difference below comes from the condition. 80MoCrV42-16-QT58 is the stronger of the two: yield strength 1,900 MPa (276 ksi) against 500 MPa (72.5 ksi) for 80MoCrV42-16-A, about 3.8 times as much; tensile strength follows at 2,200 MPa (319 ksi) vs 830 MPa (120 ksi). In exchange, 80MoCrV42-16-A is the more ductile: elongation 16% versus 2% for 80MoCrV42-16-QT58, and 80MoCrV42-16-QT58 is harder (675 HV vs 247 HV). 80MoCrV42-16-QT58 runs hotter in service (315°C vs 250°C continuous). On the shop floor, 80MoCrV42-16-A machines more easily (poor vs not recommended).
80MoCrV42-16-AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
80MoCrV42-16-QT58Choose it when strength drives the design, or when the part sees heat.
80MoCrV42-16-A vs 80MoCrV42-16-QT58: 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.
80MoCrV42-16-A80MoCrV42-16-QT58
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)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 79 GPa11.5 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Hardness, Brinell 235 HB · Hardness, Rockwell B 99 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.97 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,420°C2,588 °F · Liquidus Temperature 1,470°C2,678 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 24 W/m·K13.9 BTU/hr·ft·°F · Specific Heat Capacity 460 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 250 J/g107 BTU/lb · Min Service Temperature -60°C-76 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.6 V · Corrosion Resistance 15 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 38% · Weldability 12 / 100 · Formability (cold) 15 / 100 · Brazeability / Solderability 35 / 100 · Polishability 85 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 42 MJ/kg18,057 BTU/lb · Embodied Carbon (primary production) 3 kg CO₂/kg · Embodied Water 65 L/kg7.8 gal/lb · Typical Recycled Content 20%
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.
80MoCrV42-16-A vs 80MoCrV42-16-QT58 — frequently asked
Is 80MoCrV42-16-QT58 stronger than 80MoCrV42-16-A?
Yes. 80MoCrV42-16-QT58 has a typical yield strength of 1,900 MPa (276 ksi) against 500 MPa (72.5 ksi) for 80MoCrV42-16-A — about 3.8 times as much. Tensile strength is 2,200 MPa (319 ksi) vs 830 MPa (120 ksi).
Which condition does FabDigit quote by default, A or QT58?
A is the default 80MoCrV42-16 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 is easier to machine, 80MoCrV42-16-A or 80MoCrV42-16-QT58?
80MoCrV42-16-A. Its machinability rates poor (30/100) against not recommended (6/100) for 80MoCrV42-16-QT58.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 80MoCrV42-16-A and 80MoCrV42-16-QT58 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.