Steel ZG35CrMo-F vs ZG35CrMo-SR
Steel · ZG35CrMo temper comparison
ZG35CrMo-F and ZG35CrMo-SR are two conditions of the same steel grade, ZG35CrMo: F (as fabricated) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. ZG35CrMo-SR is the stronger of the two: yield strength 540 MPa (78.3 ksi) against 390 MPa (56.6 ksi) for ZG35CrMo-F, about 38% more; tensile strength follows at 730 MPa (106 ksi) vs 660 MPa (95.7 ksi). ZG35CrMo-SR is the more ductile: elongation 15% versus 8% for ZG35CrMo-F, and ZG35CrMo-SR is harder (230 HB vs 215 HB). ZG35CrMo-SR runs hotter in service (450°C vs 400°C continuous). On the shop floor, ZG35CrMo-SR welds better (45 vs 35 out of 100).
ZG35CrMo-SRChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
ZG35CrMo-F vs ZG35CrMo-SR: 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.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29
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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: 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 · 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).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: 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-F vs ZG35CrMo-SR — frequently asked
Is ZG35CrMo-SR stronger than ZG35CrMo-F?
Yes. ZG35CrMo-SR has a typical yield strength of 540 MPa (78.3 ksi) against 390 MPa (56.6 ksi) for ZG35CrMo-F — about 38% more. Tensile strength is 730 MPa (106 ksi) vs 660 MPa (95.7 ksi).
Which condition does FabDigit quote by default, F or SR?
Q&T is the default ZG35CrMo condition in the FabDigit quote flow (neither F nor SR). 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-F or ZG35CrMo-SR?
ZG35CrMo-SR, by a small margin. Both rate fair for machinability — 48/100 against 40/100 for ZG35CrMo-F; for welding the order is ZG35CrMo-SR first (fair, 45/100) then ZG35CrMo-F (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in ZG35CrMo-F and ZG35CrMo-SR 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.