Steel ZG35CrMo-A vs ZG35CrMo Q&T
Steel · ZG35CrMo temper comparison
ZG35CrMo-A and ZG35CrMo Q&T are two conditions of the same steel grade, ZG35CrMo: A (solution annealed) versus Q&T (quenched and tempered). The chemistry is identical, so every difference below comes from the condition. ZG35CrMo Q&T is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 350 MPa (50.8 ksi) for ZG35CrMo-A, about 63% more; tensile strength follows at 760 MPa (110 ksi) vs 600 MPa (87 ksi). In exchange, ZG35CrMo-A is the more ductile: elongation 17% versus 14% for ZG35CrMo Q&T, and ZG35CrMo Q&T is harder (240 HB vs 185 HB). On the shop floor, ZG35CrMo-A machines more easily (good vs fair).
ZG35CrMo-AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
ZG35CrMo Q&TChoose it when strength drives the design.
ZG35CrMo-A vs ZG35CrMo Q&T: 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
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Same in both: Elastic (Young's) Modulus 208 GPa30.2 Msi · Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29 · Compressive Strength 580 MPa84.1 ksi · Shear Strength 480 MPa69.6 ksi · Fracture Toughness (K_IC) 75 MPa·√m68.3 ksi·√in · Hardness, Rockwell C 23 HRC · Hardness, Vickers 252 HV
Physical
Density and transition temperatures.
Same in both: Density 7.85 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,490°C2,714 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 42 W/m·K24.3 BTU/hr·ft·°F · Specific Heat Capacity 470 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 270 J/g116 BTU/lb · Max Service Temperature (continuous) 450°C842 °F · Min Service Temperature -30°C-22 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 2.2×10⁻⁷ Ω·m8.66 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
Machinability Rating (AISI 1212 = 100 %)
Weldability
Same in both: Formability (cold) 10 / 100 · Castability 62 / 100 · Brazeability / Solderability 45 / 100 · Polishability 50 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 25 MJ/kg10,748 BTU/lb · Embodied Carbon (primary production) 2 kg CO₂/kg · Embodied Water 55 L/kg6.6 gal/lb · Typical Recycled Content 75%
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.
ZG35CrMo-A vs ZG35CrMo Q&T — frequently asked
Is ZG35CrMo Q&T stronger than ZG35CrMo-A?
Yes. ZG35CrMo Q&T has a typical yield strength of 570 MPa (82.7 ksi) against 350 MPa (50.8 ksi) for ZG35CrMo-A — about 63% more. Tensile strength is 760 MPa (110 ksi) vs 600 MPa (87 ksi).
Which condition does FabDigit quote by default, A or Q&T?
Q&T is the default ZG35CrMo 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, ZG35CrMo-A or ZG35CrMo Q&T?
ZG35CrMo-A. Its machinability rates good (58/100) against fair (45/100) for ZG35CrMo Q&T; for welding the order is ZG35CrMo-A first (fair, 48/100) then ZG35CrMo Q&T (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZG35CrMo-A and ZG35CrMo Q&T 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.