Titanium SP-700-ST vs SP-700-STA
Titanium · SP-700 temper comparison
SP-700-ST and SP-700-STA are two conditions of the same titanium grade, SP-700: ST (solution annealed) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. SP-700-STA is the stronger of the two: yield strength 1,150 MPa (167 ksi) against 790 MPa (115 ksi) for SP-700-ST, about 46% more; tensile strength follows at 1,250 MPa (181 ksi) vs 900 MPa (131 ksi). In exchange, SP-700-ST is the more ductile: elongation 20% versus 10% for SP-700-STA, and SP-700-STA is harder (300 HB vs 285 HB). SP-700-STA is stiffer (116 GPa vs 110 GPa).
SP-700-STChoose it when the part is bent, formed or impact-loaded.
SP-700-STAChoose it when strength drives the design.
SP-700-ST vs SP-700-STA: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium 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 titanium 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 C
Hardness, Vickers
Same in both: Shear Modulus 43 GPa6.2 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 4.54 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,590°C2,894 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 7 W/m·K4 BTU/hr·ft·°F · Specific Heat Capacity 530 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.4 µm/m·K5.2 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1 % IACS · Electrical Resistivity 1.7×10⁻⁶ Ω·m66.9 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 88 / 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: Castability 30 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 900 L/kg108 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
SP-700-ST vs SP-700-STA — frequently asked
Is SP-700-STA stronger than SP-700-ST?
Yes. SP-700-STA has a typical yield strength of 1,150 MPa (167 ksi) against 790 MPa (115 ksi) for SP-700-ST — about 46% more. Tensile strength is 1,250 MPa (181 ksi) vs 900 MPa (131 ksi).
Which condition does FabDigit quote by default, ST or STA?
Annealed is the default SP-700 condition in the FabDigit quote flow (neither ST nor STA). 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, SP-700-ST or SP-700-STA?
SP-700-ST, by a small margin. Both rate poor for machinability — 22/100 against 15/100 for SP-700-STA; for welding the order is SP-700-ST first (very good, 70/100) then SP-700-STA (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in SP-700-ST and SP-700-STA 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.