# Grade 38 (R54250) Titanium

Grade 38 titanium is a titanium alloy formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. R54250 is the UNS number for this material. Additionally, the ASTM designation is Titanium Grade 38.

It has a moderately high tensile strength among the wrought titaniums in the database.

The graph bars on the material properties cards below compare grade 38 titanium to: wrought titaniums (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

110 *GPa* 15 *x 10 ^{6} psi*

Elongation at Break

11 *%*

Fatigue Strength

530 *MPa* 77 *x 10 ^{3} psi*

Poisson's Ratio

0.32

Reduction in Area

29 *%*

Shear Modulus

40 *GPa* 5.9 *x 10 ^{6} psi*

Shear Strength

600 *MPa* 87 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

1000 *MPa* 150 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

910 *MPa* 130 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

410 *J/g*

Maximum Temperature: Mechanical

330 *°C* 630 *°F*

Melting Completion (Liquidus)

1620 *°C* 2950 *°F*

Melting Onset (Solidus)

1570 *°C* 2860 *°F*

Specific Heat Capacity

550 *J/kg-K* 0.13 *BTU/lb-°F*

Thermal Conductivity

8.0 *W/m-K* 4.6 *BTU/h-ft-°F*

Thermal Expansion

9.3 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

1.2 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.4 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

36 *% relative*

Density

4.5 *g/cm ^{3}* 280

*lb/ft*

^{3}Embodied Carbon

35 *kg CO _{2}/kg material*

Embodied Energy

560 *MJ/kg* 240 *x 10 ^{3} BTU/lb*

Embodied Water

160 *L/kg* 20 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

110 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

3840 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

35 *points*

Strength to Weight: Axial

62 *points*

Strength to Weight: Bending

49 *points*

Thermal Diffusivity

3.2 *mm ^{2}/s*

Thermal Shock Resistance

72 *points*

## Alloy Composition

Ti | 89.9 to 93.1 | |

Al | 3.5 to 4.5 | |

V | 2.0 to 3.0 | |

Fe | 1.2 to 1.8 | |

O | 0.2 to 0.3 | |

C | 0 to 0.080 | |

N | 0 to 0.030 | |

H | 0 to 0.015 | |

res. | 0 to 0.4 |

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

## Followup Questions

## Similar Alloys

## Further Reading

Titanium Alloys: Modelling of Microstructure, Properties, and Applications, Wei Sha and Savko Malinov, 2009

ASTM B348: Standard Specification for Titanium and Titanium Alloy Bars and Billets

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

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