Stainless Steel V-57-STA vs V-57 STA-900
Stainless Steel · V-57 temper comparison
V-57-STA and V-57 STA-900 are two conditions of the same stainless steel grade, V-57: STA (solution treated and aged) versus STA-900 (solution treated ~900 °C (1650 °F) + aged 720 °C/16 h). The chemistry is identical, so every difference below comes from the condition. V-57 STA-900 is the stronger of the two: yield strength 795 MPa (115 ksi) against 725 MPa (105 ksi) for V-57-STA, about 10% more; tensile strength follows at 1,140 MPa (165 ksi) vs 1,070 MPa (155 ksi). In exchange, V-57-STA is the more ductile: elongation 20% versus 18% for V-57 STA-900, and V-57 STA-900 is harder (321 HB vs 302 HB). V-57-STA runs hotter in service (650°C vs 595°C continuous).
V-57-STAChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
V-57 STA-900Choose it when strength drives the design.
V-57-STA vs V-57 STA-900: 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
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 · Shear Strength 655 MPa95 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
Same in both: Machinability Rating (AISI 1212 = 100 %) 15% · Weldability 40 / 100 · Formability (cold) 25 / 100 · 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-STA vs V-57 STA-900 — frequently asked
Is V-57 STA-900 stronger than V-57-STA?
Yes. V-57 STA-900 has a typical yield strength of 795 MPa (115 ksi) against 725 MPa (105 ksi) for V-57-STA — about 10% more. Tensile strength is 1,140 MPa (165 ksi) vs 1,070 MPa (155 ksi).
Which condition does FabDigit quote by default, STA or STA-900?
STA is the default V-57 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 V-57-STA over V-57 STA-900?
Pick V-57-STA when the part is bent, formed or impact-loaded, or when the part sees heat. Pick V-57 STA-900 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in V-57-STA and V-57 STA-900 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.