# Hardened M52 Tool Steel

Hardened SAE-AISI M52 is SAE-AISI M52 steel in the hardened (H) condition. The graph bars on the material properties cards below compare hardened SAE-AISI M52 to: tool 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

Elastic (Young's, Tensile) Modulus

190 *GPa* 28 *x 10 ^{6} psi*

Poisson's Ratio

0.29

Rockwell C Hardness

71

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

2280 *MPa* 330 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

260 *J/g*

Melting Completion (Liquidus)

1510 *°C* 2750 *°F*

Melting Onset (Solidus)

1470 *°C* 2670 *°F*

Specific Heat Capacity

460 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

31 *W/m-K* 18 *BTU/h-ft-°F*

Thermal Expansion

13 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

8.9 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

10 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

7.9 *g/cm ^{3}* 500

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

110 *MJ/kg* 49 *x 10 ^{3} BTU/lb*

Embodied Water

89 *L/kg* 11 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

20

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

80 *points*

Strength to Weight: Bending

49 *points*

Thermal Diffusivity

8.4 *mm ^{2}/s*

Thermal Shock Resistance

67 *points*

## Alloy Composition

Fe | 84.4 to 88.9 | |

Mo | 4.0 to 4.9 | |

Cr | 3.5 to 4.3 | |

V | 1.7 to 2.3 | |

W | 0.75 to 1.5 | |

C | 0.85 to 1.0 | |

Si | 0.2 to 0.6 | |

Mn | 0.15 to 0.45 | |

Ni | 0 to 0.3 | |

Cu | 0 to 0.25 | |

P | 0 to 0.030 | |

S | 0 to 0.030 |

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

## Followup Questions

## Further Reading

ASTM A600: Standard Specification for Tool Steel High Speed

Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016

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