Titanium Ti Grade 19 CD+A vs Ti Grade 19-ST
Titanium · Ti Grade 19 temper comparison
Ti Grade 19 CD+A and Ti Grade 19-ST are two conditions of the same titanium grade, Ti Grade 19: CD+A (cold drawn (solution treated) then aged, spring wire condition) versus ST (solution annealed). The chemistry is identical, so every difference below comes from the condition. Ti Grade 19 CD+A is the stronger of the two: yield strength 1,330 MPa (193 ksi) against 860 MPa (125 ksi) for Ti Grade 19-ST, about 55% more; tensile strength follows at 1,400 MPa (203 ksi) vs 930 MPa (135 ksi). In exchange, Ti Grade 19-ST is the more ductile: elongation 18% versus 6% for Ti Grade 19 CD+A, and Ti Grade 19 CD+A is harder (45 HRC vs 30 HRC). Ti Grade 19 CD+A is stiffer (105 GPa vs 96 GPa) and Ti Grade 19 CD+A runs hotter in service (300°C vs 260°C continuous). On the shop floor, Ti Grade 19-ST machines more easily (poor vs not recommended).
Ti Grade 19 CD+AChoose it when strength drives the design, or when the part sees heat.
Ti Grade 19-STChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Ti Grade 19 CD+A vs Ti Grade 19-ST: 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.
Ti Grade 19 CD+ATi Grade 19-ST
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Hardness, Rockwell C
Hardness, Vickers
Same in both: Bulk Modulus 86 GPa12.5 Msi · Poisson's Ratio 0.3 · Reduction in Area 48% · Compressive Strength 880 MPa128 ksi · Shear Strength 590 MPa85.6 ksi · Fracture Toughness (K_IC) 85 MPa·√m77.4 ksi·√in · Charpy V-Notch Impact (RT) 27 J19.9 ft·lbf · Hardness, Brinell 285 HB
Physical
Density and transition temperatures.
Same in both: Density 4.82 g/cm³0.17 lb/in³ · Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 7.6 W/m·K4.4 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9 µm/m·K5 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.1 % IACS · Electrical Resistivity 1.6×10⁻⁶ Ω·m63 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
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 18% · Weldability 65 / 100 · Castability 25 / 100 · Brazeability / Solderability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Embodied Carbon (primary production) 45 kg CO₂/kg · Embodied Water 1,600 L/kg192 gal/lb · Typical Recycled Content 30%
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.
Ti Grade 19 CD+A vs Ti Grade 19-ST — frequently asked
Is Ti Grade 19 CD+A stronger than Ti Grade 19-ST?
Yes. Ti Grade 19 CD+A has a typical yield strength of 1,330 MPa (193 ksi) against 860 MPa (125 ksi) for Ti Grade 19-ST — about 55% more. Tensile strength is 1,400 MPa (203 ksi) vs 930 MPa (135 ksi).
Which condition does FabDigit quote by default, CD+A or ST?
ST is the default Ti Grade 19 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.
Which is easier to machine, Ti Grade 19 CD+A or Ti Grade 19-ST?
Ti Grade 19-ST. Its machinability rates poor (20/100) against not recommended (10/100) for Ti Grade 19 CD+A.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 19 CD+A and Ti Grade 19-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.