# ASTM A414 Grade H Steel

ASTM A414 grade H is a type of ASTM A414 steel. Cited properties are appropriate for the hot worked condition. It has the second highest strength compared to the other variants of ASTM A414 steel.

The graph bars on the material properties cards below compare ASTM A414 grade H to: wrought alloy steels in the same category (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

170

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

26 *%*

Fatigue Strength

260 *MPa* 38 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

370 *MPa* 53 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

570 *MPa* 82 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

350 *MPa* 51 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

250 *J/g*

Maximum Temperature: Mechanical

400 *°C* 760 *°F*

Melting Completion (Liquidus)

1460 *°C* 2670 *°F*

Melting Onset (Solidus)

1420 *°C* 2590 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

49 *W/m-K* 28 *BTU/h-ft-°F*

Thermal Expansion

13 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.2 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.3 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

2.2 *% relative*

Density

7.9 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

22 *MJ/kg* 9.4 *x 10 ^{3} BTU/lb*

Embodied Water

48 *L/kg* 5.7 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

130 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

330 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

20 *points*

Strength to Weight: Bending

19 *points*

Thermal Diffusivity

13 *mm ^{2}/s*

Thermal Shock Resistance

17 *points*

## Alloy Composition

Fe | 97.2 to 99.94 | |

Mn | 0 to 1.5 | |

Si | 0 to 0.3 | |

Ni | 0 to 0.2 | |

Cu | 0 to 0.2 | |

V | 0.050 to 0.1 | |

Cr | 0 to 0.15 | |

C | 0 to 0.14 | |

Al | 0.020 to 0.080 | |

Mo | 0 to 0.060 | |

Nb | 0.0050 to 0.050 | |

Ti | 0.0050 to 0.025 | |

P | 0 to 0.020 | |

S | 0 to 0.015 | |

N | 0 to 0.0090 |

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

## Followup Questions

## Similar Alloys

## Further Reading

ASTM A414: Standard Specification for Steel, Sheet, Carbon, and High-Strength, Low-Alloy for Pressure Vessels

Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011

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

Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008

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