Titanium Ti Grade 4-CD vs Ti Grade 4-SR
Titanium · Ti Grade 4 temper comparison
Ti Grade 4-CD and Ti Grade 4-SR are two conditions of the same titanium grade, Ti Grade 4: CD (cold drawn) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Ti Grade 4-CD is the stronger of the two: yield strength 760 MPa (110 ksi) against 545 MPa (79 ksi) for Ti Grade 4-SR, about 39% more; tensile strength follows at 860 MPa (125 ksi) vs 640 MPa (92.8 ksi). In exchange, Ti Grade 4-SR is the more ductile: elongation 18% versus 10% for Ti Grade 4-CD, and Ti Grade 4-CD is harder (310 HB vs 260 HB).
Ti Grade 4-CDChoose it when strength drives the design.
Ti Grade 4-SRChoose it when the part is bent, formed or impact-loaded.
Ti Grade 4-CD vs Ti Grade 4-SR: 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.
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 105 GPa15.2 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 4.51 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,660°C3,020 °F · Liquidus Temperature 1,670°C3,038 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 17 W/m·K9.8 BTU/hr·ft·°F · Specific Heat Capacity 540 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.6 µm/m·K4.8 µin/in·°F · Latent Heat of Fusion 295 J/g127 BTU/lb · Max Service Temperature (continuous) 300°C572 °F · Min Service Temperature -100°C-148 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.1 % IACS · Electrical Resistivity 5.6×10⁻⁷ Ω·m22 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 92 / 100
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 85 / 100 · Castability 35 / 100 · Brazeability / Solderability 40 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Embodied Carbon (primary production) 45 kg CO₂/kg · Embodied Water 900 L/kg108 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 4-CD vs Ti Grade 4-SR — frequently asked
Is Ti Grade 4-CD stronger than Ti Grade 4-SR?
Yes. Ti Grade 4-CD has a typical yield strength of 760 MPa (110 ksi) against 545 MPa (79 ksi) for Ti Grade 4-SR — about 39% more. Tensile strength is 860 MPa (125 ksi) vs 640 MPa (92.8 ksi).
Which condition does FabDigit quote by default, CD or SR?
Annealed is the default Ti Grade 4 condition in the FabDigit quote flow (neither CD nor SR). 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 4-CD or Ti Grade 4-SR?
Ti Grade 4-CD, by a small margin. Both rate poor for machinability — 33/100 against 28/100 for Ti Grade 4-SR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 4-CD and Ti Grade 4-SR 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.