Stainless Steel S31200-AW vs S31200-CD
Stainless Steel · S31200 temper comparison
S31200-AW and S31200-CD are two conditions of the same stainless steel grade, S31200: AW (as-welded deposit) versus CD (cold drawn). The chemistry is identical, so every difference below comes from the condition. S31200-CD is the stronger of the two: yield strength 680 MPa (98.6 ksi) against 540 MPa (78.3 ksi) for S31200-AW, about 26% more; tensile strength follows at 880 MPa (128 ksi) vs 750 MPa (109 ksi). In exchange, S31200-AW is the more ductile: elongation 25% versus 20% for S31200-CD, and S31200-CD is harder (280 HB vs 250 HB).
S31200-AWChoose it when the part is bent, formed or impact-loaded.
S31200-CDChoose it when strength drives the design.
S31200-AW vs S31200-CD: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3 · Hardness, Rockwell B 100 HRB
Physical
Density and transition temperatures.
Same in both: Density 7.8 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,385°C2,525 °F · Liquidus Temperature 1,445°C2,633 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Same in both: Specific Heat Capacity 480 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 13 µm/m·K7.2 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 2.2 % IACS
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 65 / 100 · Castability 45 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 4.5 kg CO₂/kg · Embodied Water 120 L/kg14.4 gal/lb · Typical Recycled Content 65%
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.
S31200-AW vs S31200-CD — frequently asked
Is S31200-CD stronger than S31200-AW?
Yes. S31200-CD has a typical yield strength of 680 MPa (98.6 ksi) against 540 MPa (78.3 ksi) for S31200-AW — about 26% more. Tensile strength is 880 MPa (128 ksi) vs 750 MPa (109 ksi).
Which condition does FabDigit quote by default, AW or CD?
SA is the default S31200 condition in the FabDigit quote flow (neither AW nor CD). 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 S31200-AW over S31200-CD?
Pick S31200-AW when the part is bent, formed or impact-loaded. Pick S31200-CD when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in S31200-AW and S31200-CD 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.