# H1025 Hardened S15500 Stainless Steel

H1025 hardened S15500 stainless steel is S15500 stainless steel in the hardened (H) condition. The graph bars on the material properties cards below compare H1025 hardened S15500 stainless steel to: wrought precipitation-hardening stainless 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

380

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

9.0 *%*

Fatigue Strength

590 *MPa* 86 *x 10 ^{3} psi*

Impact Strength: V-Notched Charpy

16 *J* 12 *ft-lb*

Poisson's Ratio

0.28

Reduction in Area

31 *%*

Rockwell C Hardness

39

Shear Modulus

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

Shear Strength

710 *MPa* 100 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

1140 *MPa* 170 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

280 *J/g*

Maximum Temperature: Corrosion

440 *°C* 830 *°F*

Maximum Temperature: Mechanical

820 *°C* 1510 *°F*

Melting Completion (Liquidus)

1430 *°C* 2600 *°F*

Melting Onset (Solidus)

1380 *°C* 2520 *°F*

Specific Heat Capacity

480 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

17 *W/m-K* 9.8 *BTU/h-ft-°F*

Thermal Expansion

11 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

2.2 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.5 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

13 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

39 *MJ/kg* 17 *x 10 ^{3} BTU/lb*

Embodied Water

130 *L/kg* 15 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

15

Resilience: Ultimate (Unit Rupture Work)

110 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

3370 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

25 *points*

Strength to Weight: Axial

43 *points*

Strength to Weight: Bending

32 *points*

Thermal Diffusivity

4.6 *mm ^{2}/s*

Thermal Shock Resistance

40 *points*

## Alloy Composition

Fe | 71.9 to 79.9 | |

Cr | 14 to 15.5 | |

Ni | 3.5 to 5.5 | |

Cu | 2.5 to 4.5 | |

Mn | 0 to 1.0 | |

Si | 0 to 1.0 | |

Nb | 0.15 to 0.45 | |

C | 0 to 0.070 | |

P | 0 to 0.040 | |

S | 0 to 0.030 |

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

## Followup Questions

## Further Reading

ASTM A564: Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes

Metallic Materials: Physical, Mechanical, and Corrosion Properties, Philip A. Schweitzer, 2003

Welding Metallurgy and Weldability of Stainless Steels, John C. Lippold and Damian J. Kotecki, 2005

ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels

Corrosion of Stainless Steels, A. John Sedriks, 1996

ASM Specialty Handbook: Stainless Steels, J. R. Davis (editor), 1994

Advances in Stainless Steels, Baldev Raj et al. (editors), 2010