Steel GX5NiS36-F vs GX5NiS36-SR
Steel · GX5NiS36 temper comparison
GX5NiS36-F and GX5NiS36-SR are two conditions of the same steel grade, GX5NiS36: F (as fabricated) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. GX5NiS36-F is the stronger of the two: yield strength 215 MPa (31.2 ksi) against 200 MPa (29 ksi) for GX5NiS36-SR, about 8% more. In exchange, GX5NiS36-SR is the more ductile: elongation 12% versus 10% for GX5NiS36-F, and GX5NiS36-F is harder (145 HB vs 135 HB).
GX5NiS36-FChoose it when strength drives the design.
GX5NiS36-SRChoose it when the part is bent, formed or impact-loaded.
GX5NiS36-F vs GX5NiS36-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 B
Hardness, Vickers
Same in both: Shear Modulus 55 GPa8 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8.1 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,425°C2,597 °F · Liquidus Temperature 1,450°C2,642 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Same in both: Specific Heat Capacity 515 J/kg·K0.12 BTU/lb·°F · Latent Heat of Fusion 275 J/g118 BTU/lb · Max Service Temperature (continuous) 200°C392 °F · Min Service Temperature -150°C-238 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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 60 / 100 · Brazeability / Solderability 55 / 100 · Polishability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 110 MJ/kg47,292 BTU/lb · Embodied Carbon (primary production) 8.5 kg CO₂/kg · Embodied Water 300 L/kg35.9 gal/lb · Typical Recycled Content 35%
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.
GX5NiS36-F vs GX5NiS36-SR — frequently asked
Is GX5NiS36-F stronger than GX5NiS36-SR?
Yes. GX5NiS36-F has a typical yield strength of 215 MPa (31.2 ksi) against 200 MPa (29 ksi) for GX5NiS36-SR — about 8% more. Tensile strength is 430 MPa (62.4 ksi) vs 420 MPa (60.9 ksi).
Which condition does FabDigit quote by default, F or SR?
SR is the default GX5NiS36 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.
When should I choose GX5NiS36-F over GX5NiS36-SR?
Pick GX5NiS36-F when strength drives the design. Pick GX5NiS36-SR when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in GX5NiS36-F and GX5NiS36-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.