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ASTM B817 Type II Titanium

ASTM B817 type II is a titanium alloy formulated for forming by powder metallurgy. It has a very low melting temperature among titanium alloys. In addition, it has a moderately high density and a moderately high embodied energy.

The properties of ASTM B817 type II include three 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 II 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

3.0 to 13 %

Fatigue Strength

390 to 530 MPa 57 to 77 x 103 psi

Poisson's Ratio


Reduction in Area

4.0 to 13 %

Shear Modulus

40 GPa 5.7 x 106 psi

Tensile Strength: Ultimate (UTS)

900 to 960 MPa 130 to 140 x 103 psi

Tensile Strength: Yield (Proof)

780 to 900 MPa 110 to 130 x 103 psi

Thermal Properties

Latent Heat of Fusion

400 J/g

Maximum Temperature: Mechanical

350 °C 660 °F

Melting Completion (Liquidus)

1580 °C 2880 °F

Melting Onset (Solidus)

1530 °C 2790 °F

Specific Heat Capacity

550 J/kg-K 0.13 BTU/lb-°F

Thermal Expansion

9.9 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

37 % relative


4.6 g/cm3 290 lb/ft3

Embodied Carbon

40 kg CO2/kg material

Embodied Energy

650 MJ/kg 280 x 103 BTU/lb

Embodied Water

220 L/kg 26 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

26 to 120 MJ/m3

Resilience: Unit (Modulus of Resilience)

2890 to 3890 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

34 points

Strength to Weight: Axial

55 to 58 points

Strength to Weight: Bending

45 to 47 points

Thermal Shock Resistance

62 to 66 points

Alloy Composition

Titanium (Ti)Ti 82.1 to 87.8
Aluminum (Al)Al 5.0 to 6.0
Vanadium (V)V 5.0 to 6.0
Tin (Sn)Sn 1.5 to 2.5
Iron (Fe)Fe 0.35 to 1.0
Copper (Cu)Cu 0.35 to 1.0
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