# Quenched and Tempered 6150 Chromium-Vanadium Steel

Quenched and tempered SAE-AISI 6150 is SAE-AISI 6150 steel in the quenched and tempered condition. It has the highest strength and lowest ductility compared to the other variants of SAE-AISI 6150 steel.

The graph bars on the material properties cards below compare quenched and tempered SAE-AISI 6150 to: SAE-AISI wrought steels (top), all iron 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

Brinell Hardness

350

Elastic (Young's, Tensile) Modulus

190 *GPa* 27 *x 10 ^{6} psi*

Elongation at Break

15 *%*

Fatigue Strength

750 *MPa* 110 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

73 *GPa* 11 *x 10 ^{6} psi*

Shear Strength

730 *MPa* 110 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

1200 *MPa* 170 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

1160 *MPa* 170 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

250 *J/g*

Maximum Temperature: Mechanical

420 *°C* 790 *°F*

Melting Completion (Liquidus)

1460 *°C* 2650 *°F*

Melting Onset (Solidus)

1410 *°C* 2580 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

46 *W/m-K* 27 *BTU/h-ft-°F*

Thermal Expansion

12 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.3 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.4 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

2.3 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

28 *MJ/kg* 12 *x 10 ^{3} BTU/lb*

Embodied Water

51 *L/kg* 6.1 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

180 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

3590 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

43 *points*

Strength to Weight: Bending

32 *points*

Thermal Diffusivity

13 *mm ^{2}/s*

Thermal Shock Resistance

38 *points*

## Alloy Composition

Fe | 96.7 to 97.7 | |

Cr | 0.8 to 1.1 | |

Mn | 0.7 to 0.9 | |

C | 0.48 to 0.53 | |

Si | 0.15 to 0.35 | |

V | 0.15 to 0.3 | |

S | 0 to 0.040 | |

P | 0 to 0.035 |

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

## Followup Questions

## Further Reading

ASTM A322: Standard Specification for Steel Bars, Alloy, Standard Grades

ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996

Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015

Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015