Titanium B817 Type I vs B817 Type II
Titanium · grade comparison
Titanium B817 Type I and B817 Type II are both titanium grades. B817 Type II is the stronger of the two: yield strength 855 MPa (124 ksi) against 350 MPa (50.8 ksi) for B817 Type I, about 144% more; tensile strength follows at 930 MPa (135 ksi) vs 450 MPa (65.3 ksi). In exchange, B817 Type I is the more ductile: elongation 18% versus 12% for B817 Type II, and B817 Type II is harder (330 HB vs 160 HB). B817 Type II is stiffer (113 GPa vs 100 GPa) and B817 Type II runs hotter in service (350°C vs 300°C continuous). On the shop floor, B817 Type I machines more easily (fair vs poor) and B817 Type I welds better (very good vs good).
B817 Type IChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
B817 Type IIChoose it when strength drives the design, or when the part sees heat.
B817 Type I vs B817 Type II: 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
Shear Modulus
Bulk 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 B
Hardness, Vickers
Hardness, Rockwell C
Same in both: Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 4.42 g/cm³0.16 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 500 L/kg59.9 gal/lb · Typical Recycled Content 20%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | B817 Type I | B817 Type II |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
B817 Type I vs B817 Type II — frequently asked
Is B817 Type II stronger than B817 Type I?
Yes. B817 Type II has a typical yield strength of 855 MPa (124 ksi) against 350 MPa (50.8 ksi) for B817 Type I — about 144% more. Tensile strength is 930 MPa (135 ksi) vs 450 MPa (65.3 ksi).
Which is cheaper, B817 Type I or B817 Type II?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, B817 Type I or B817 Type II?
B817 Type I. Its machinability rates fair (35/100) against poor (20/100) for B817 Type II; for welding the order is B817 Type I first (very good, 75/100) then B817 Type II (good, 60/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in B817 Type I and B817 Type II 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.