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ASTM B817 Type I Titanium

ASTM B817 type I is a titanium alloy formulated for forming by powder metallurgy. It has a fairly low density among titanium alloys. In addition, it has a moderately high heat capacity and a fairly low melting temperature.

The properties of ASTM B817 type I include four common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare ASTM B817 type I to: powder metallurgy titanium alloys (top), all titanium alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

100 GPa 15 x 106 psi

Elongation at Break

4.0 to 13 %

Fatigue Strength

360 to 520 MPa 52 to 75 x 103 psi

Poisson's Ratio


Reduction in Area

5.0 to 29 %

Shear Modulus

40 GPa 5.8 x 106 psi

Tensile Strength: Ultimate (UTS)

770 to 960 MPa 110 to 140 x 103 psi

Tensile Strength: Yield (Proof)

700 to 860 MPa 100 to 130 x 103 psi

Thermal Properties

Latent Heat of Fusion

410 J/g

Maximum Temperature: Mechanical

340 °C 640 °F

Melting Completion (Liquidus)

1600 °C 2920 °F

Melting Onset (Solidus)

1550 °C 2830 °F

Specific Heat Capacity

560 J/kg-K 0.13 BTU/lb-°F

Thermal Conductivity

7.1 W/m-K 4.1 BTU/h-ft-°F

Thermal Expansion

9.6 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

1.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

2.0 % IACS

Otherwise Unclassified Properties

Base Metal Price

36 % relative


4.4 g/cm3 280 lb/ft3

Embodied Carbon

38 kg CO2/kg material

Embodied Energy

610 MJ/kg 260 x 103 BTU/lb

Embodied Water

200 L/kg 23 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

30 to 120 MJ/m3

Resilience: Unit (Modulus of Resilience)

2310 to 3540 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

35 points

Strength to Weight: Axial

48 to 60 points

Strength to Weight: Bending

42 to 49 points

Thermal Diffusivity

2.9 mm2/s

Thermal Shock Resistance

54 to 68 points

Alloy Composition

Titanium (Ti)Ti 87 to 91
Aluminum (Al)Al 5.5 to 6.8
Vanadium (V)V 3.5 to 4.5
Iron (Fe)Fe 0 to 0.4
Oxygen (O)O 0 to 0.3
Sodium (Na)Na 0 to 0.2
Chlorine (Cl)Cl 0 to 0.2
Carbon (C)C 0 to 0.1
Silicon (Si)Si 0 to 0.1
Nitrogen (N)N 0 to 0.040
Hydrogen (H)H 0 to 0.015
Residualsres. 0 to 0.4

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Similar Alloys

Further Reading

ASTM B817: Standard Specification for Powder Metallurgy (P/M) Titanium Alloy Structural Components

Titanium and Titanium Alloys: Fundamentals and Applications, Christoph Leyens and Manfred Peters (editors), 2003

Titanium, 2nd ed., G. Lutjering and J. C. Williams, 2007