Stainless Steel S31730 Cold Drawn vs S31730 Full Hard
Stainless Steel · S31730 temper comparison
S31730 Cold Drawn and S31730 Full Hard are two conditions of the same stainless steel grade, S31730: Cold Drawn versus Full Hard. The chemistry is identical, so every difference below comes from the condition. S31730 Full Hard is the stronger of the two: yield strength 1,010 MPa (146 ksi) against 550 MPa (79.8 ksi) for S31730 Cold Drawn, about 84% more; tensile strength follows at 1,310 MPa (190 ksi) vs 760 MPa (110 ksi). In exchange, S31730 Cold Drawn is the more ductile: elongation 25% versus 4% for S31730 Full Hard, and S31730 Full Hard is harder (375 HB vs 220 HB). S31730 Cold Drawn runs hotter in service (425°C vs 300°C continuous). On the shop floor, S31730 Cold Drawn machines more easily (fair vs poor) and S31730 Cold Drawn welds better (very good vs good).
S31730 Cold DrawnChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
S31730 Full HardChoose it when strength drives the design.
S31730 Cold Drawn vs S31730 Full Hard: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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.
S31730 Cold DrawnS31730 Full Hard
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
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
Physical
Density and transition temperatures.
Same in both: Density 8 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,375°C2,507 °F · Liquidus Temperature 1,425°C2,597 °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 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.2 µm/m·K9 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.08 V
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: Brazeability / Solderability 60 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 82 MJ/kg35,254 BTU/lb · Embodied Carbon (primary production) 5.4 kg CO₂/kg · Embodied Water 150 L/kg18 gal/lb · Typical Recycled Content 55%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
S31730 Cold Drawn vs S31730 Full Hard — frequently asked
Is S31730 Full Hard stronger than S31730 Cold Drawn?
Yes. S31730 Full Hard has a typical yield strength of 1,010 MPa (146 ksi) against 550 MPa (79.8 ksi) for S31730 Cold Drawn — about 84% more. Tensile strength is 1,310 MPa (190 ksi) vs 760 MPa (110 ksi).
Which condition does FabDigit quote by default, Cold Drawn or Full Hard?
Annealed is the default S31730 condition in the FabDigit quote flow (neither Cold Drawn nor Full Hard). 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, S31730 Cold Drawn or S31730 Full Hard?
S31730 Cold Drawn. Its machinability rates fair (40/100) against poor (25/100) for S31730 Full Hard; for welding the order is S31730 Cold Drawn first (very good, 75/100) then S31730 Full Hard (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in S31730 Cold Drawn and S31730 Full Hard 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.