Titanium C-4-ANN vs C-4-SR
Titanium · C-4 temper comparison
C-4-ANN and C-4-SR are two conditions of the same titanium grade, C-4: ANN (annealed) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Both yield at about 500 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (annealed versus stress relieved). C-4-ANN is the more ductile: elongation 15% versus 13% for C-4-SR.
C-4-ANNChoose it when the part is bent, formed or impact-loaded.
C-4-ANN vs C-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
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 104 GPa15.1 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Fatigue Strength (Endurance Limit) 250 MPa36.3 ksi
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 17.2 W/m·K9.9 BTU/hr·ft·°F · Specific Heat Capacity 544 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 320 J/g138 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 2.9 % IACS · Electrical Resistivity 6×10⁻⁷ Ω·m23.6 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
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 35% · Castability 60 / 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) 39 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.
C-4-ANN vs C-4-SR — frequently asked
What is the difference between C-4-ANN and C-4-SR?
C-4-ANN and C-4-SR are two conditions of the same titanium grade, C-4: ANN (annealed) versus SR (stress relieved). The chemistry is identical, so every difference below comes from the condition. Both yield at about 500 MPa — the mechanical properties are the same, and the difference is in how the stock is processed and what it is certified to (annealed versus stress relieved).
Which condition does FabDigit quote by default, ANN or SR?
F is the default C-4 condition in the FabDigit quote flow (neither ANN 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.
When should I choose C-4-ANN over C-4-SR?
Pick C-4-ANN when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in C-4-ANN and C-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.