Steel 33NiCrMoV14-5 +QT vs 33NiCrMoV14-5 +QT900
Steel · 33NiCrMoV14-5 temper comparison
33NiCrMoV14-5 +QT and 33NiCrMoV14-5 +QT900 are two conditions of the same steel grade, 33NiCrMoV14-5: +QT (quenched and tempered) versus +QT900 (quenched and tempered, Rm 900–1100 MPa). The chemistry is identical, so every difference below comes from the condition. 33NiCrMoV14-5 +QT is the stronger of the two: yield strength 1,050 MPa (152 ksi) against 800 MPa (116 ksi) for 33NiCrMoV14-5 +QT900, about 31% more; tensile strength follows at 1,250 MPa (181 ksi) vs 980 MPa (142 ksi). In exchange, 33NiCrMoV14-5 +QT900 is the more ductile: elongation 16% versus 12% for 33NiCrMoV14-5 +QT, and 33NiCrMoV14-5 +QT is harder (375 HB vs 300 HB).
33NiCrMoV14-5 +QTChoose it when strength drives the design.
33NiCrMoV14-5 +QT900Choose it when the part is bent, formed or impact-loaded.
33NiCrMoV14-5 +QT vs 33NiCrMoV14-5 +QT900: 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.
33NiCrMoV14-5 +QT33NiCrMoV14-5 +QT900
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 207 GPa30 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 1,080 MPa157 ksi · Shear Strength 750 MPa109 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 32 W/m·K18.5 BTU/hr·ft·°F · Specific Heat Capacity 460 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 270 J/g116 BTU/lb · Min Service Temperature -80°C-112 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 3×10⁻⁷ Ω·m11.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 13 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Same in both: Machinability Rating (AISI 1212 = 100 %) 35% · Weldability 22 / 100 · Formability (cold) 18 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Embodied Carbon (primary production) 2.5 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.
33NiCrMoV14-5 +QT vs 33NiCrMoV14-5 +QT900 — frequently asked
Is 33NiCrMoV14-5 +QT stronger than 33NiCrMoV14-5 +QT900?
Yes. 33NiCrMoV14-5 +QT has a typical yield strength of 1,050 MPa (152 ksi) against 800 MPa (116 ksi) for 33NiCrMoV14-5 +QT900 — about 31% more. Tensile strength is 1,250 MPa (181 ksi) vs 980 MPa (142 ksi).
Which condition does FabDigit quote by default, +QT or +QT900?
+QT is the default 33NiCrMoV14-5 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, 33NiCrMoV14-5 +QT or 33NiCrMoV14-5 +QT900?
33NiCrMoV14-5 +QT900. Its machinability rates fair (38/100) against poor (32/100) for 33NiCrMoV14-5 +QT.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 33NiCrMoV14-5 +QT and 33NiCrMoV14-5 +QT900 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.