Stainless Steel V-57 CD+A vs V-57-ST
Stainless Steel · V-57 temper comparison
V-57 CD+A and V-57-ST are two conditions of the same stainless steel grade, V-57: CD+A (cold drawn/cold worked then aged) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. V-57 CD+A is the stronger of the two: yield strength 1,035 MPa (150 ksi) against 275 MPa (39.9 ksi) for V-57-ST, about 3.8 times as much; tensile strength follows at 1,240 MPa (180 ksi) vs 690 MPa (100 ksi). In exchange, V-57-ST is the more ductile: elongation 45% versus 12% for V-57 CD+A, and V-57 CD+A is harder (352 HB vs 170 HB). On the shop floor, V-57-ST machines more easily (25 vs 15 out of 100) and V-57-ST welds better (good vs poor).
V-57 CD+AChoose it when strength drives the design.
V-57-STChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
V-57 CD+A vs V-57-ST: 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
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 201 GPa29.2 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.31 · Compressive Strength 745 MPa108 ksi · Fracture Toughness (K_IC) 130 MPa·√m118 ksi·√in · Hardness, Vickers 320 HV
Physical
Density and transition temperatures.
Same in both: Density 7.92 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,425°C2,597 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 14 W/m·K8.1 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16.5 µm/m·K9.2 µin/in·°F · Latent Heat of Fusion 285 J/g123 BTU/lb · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.9 % IACS · Electrical Resistivity 9.1×10⁻⁷ Ω·m35.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 62 / 100
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 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 95 MJ/kg40,843 BTU/lb · Embodied Carbon (primary production) 6.8 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 30%
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.
V-57 CD+A vs V-57-ST — frequently asked
Is V-57 CD+A stronger than V-57-ST?
Yes. V-57 CD+A has a typical yield strength of 1,035 MPa (150 ksi) against 275 MPa (39.9 ksi) for V-57-ST — about 3.8 times as much. Tensile strength is 1,240 MPa (180 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, CD+A or ST?
STA is the default V-57 condition in the FabDigit quote flow (neither CD+A nor ST). 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, V-57 CD+A or V-57-ST?
V-57-ST, by a small margin. Both rate poor for machinability — 25/100 against 15/100 for V-57 CD+A; for welding the order is V-57-ST first (good, 55/100) then V-57 CD+A (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in V-57 CD+A and V-57-ST 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.