Steel G32NiCrMo8-5-4 +A vs G32NiCrMo8-5-4 +QT3
Steel · G32NiCrMo8-5-4 temper comparison
G32NiCrMo8-5-4 +A and G32NiCrMo8-5-4 +QT3 are two conditions of the same steel grade, G32NiCrMo8-5-4: +A (annealed) versus +QT3 (quenched and low-tempered, maximum hardness class). The chemistry is identical, so every difference below comes from the condition. G32NiCrMo8-5-4 +QT3 is the stronger of the two: yield strength 1,150 MPa (167 ksi) against 420 MPa (60.9 ksi) for G32NiCrMo8-5-4 +A, about 174% more; tensile strength follows at 1,350 MPa (196 ksi) vs 700 MPa (102 ksi). In exchange, G32NiCrMo8-5-4 +A is the more ductile: elongation 18% versus 7% for G32NiCrMo8-5-4 +QT3, and G32NiCrMo8-5-4 +QT3 is harder (400 HB vs 210 HB). G32NiCrMo8-5-4 +A runs hotter in service (400°C vs 220°C continuous). On the shop floor, G32NiCrMo8-5-4 +A machines more easily (fair vs poor) and G32NiCrMo8-5-4 +A welds better (fair vs poor).
G32NiCrMo8-5-4 +AChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
G32NiCrMo8-5-4 +QT3Choose it when strength drives the design.
G32NiCrMo8-5-4 +A vs G32NiCrMo8-5-4 +QT3: 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.
G32NiCrMo8-5-4 +AG32NiCrMo8-5-4 +QT3
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
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 210 GPa30.5 Msi · Shear Modulus 81 GPa11.7 Msi · Bulk Modulus 163 GPa23.6 Msi · Poisson's Ratio 0.29 · Compressive Strength 900 MPa131 ksi · Shear Strength 620 MPa89.9 ksi
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.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 38 W/m·K22 BTU/hr·ft·°F · Specific Heat Capacity 460 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 · 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) -0.6 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
Same in both: Formability (cold) 8 / 100 · Castability 60 / 100 · Brazeability / Solderability 40 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 26 MJ/kg11,178 BTU/lb · Embodied Carbon (primary production) 2.1 kg CO₂/kg · Embodied Water 60 L/kg7.2 gal/lb · Typical Recycled Content 65%
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.
G32NiCrMo8-5-4 +A vs G32NiCrMo8-5-4 +QT3 — frequently asked
Is G32NiCrMo8-5-4 +QT3 stronger than G32NiCrMo8-5-4 +A?
Yes. G32NiCrMo8-5-4 +QT3 has a typical yield strength of 1,150 MPa (167 ksi) against 420 MPa (60.9 ksi) for G32NiCrMo8-5-4 +A — about 174% more. Tensile strength is 1,350 MPa (196 ksi) vs 700 MPa (102 ksi).
Which condition does FabDigit quote by default, +A or +QT3?
+QT1 is the default G32NiCrMo8-5-4 condition in the FabDigit quote flow (neither +A nor +QT3). 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, G32NiCrMo8-5-4 +A or G32NiCrMo8-5-4 +QT3?
G32NiCrMo8-5-4 +A. Its machinability rates fair (45/100) against poor (18/100) for G32NiCrMo8-5-4 +QT3; for welding the order is G32NiCrMo8-5-4 +A first (fair, 40/100) then G32NiCrMo8-5-4 +QT3 (poor, 15/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in G32NiCrMo8-5-4 +A and G32NiCrMo8-5-4 +QT3 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.