# H850 Hardened S35500 Stainless Steel

H850 hardened S35500 stainless steel is S35500 stainless steel in the hardened (H) condition. The graph bars on the material properties cards below compare H850 hardened S35500 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

Elastic (Young's, Tensile) Modulus

200 *GPa* 29 *x 10 ^{6} psi*

Elongation at Break

14 *%*

Fatigue Strength

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

Poisson's Ratio

0.28

Rockwell C Hardness

33

Shear Modulus

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

Shear Strength

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

Tensile Strength: Ultimate (UTS)

1490 *MPa* 220 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

1280 *MPa* 190 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

280 *J/g*

Maximum Temperature: Corrosion

440 *°C* 830 *°F*

Maximum Temperature: Mechanical

870 *°C* 1610 *°F*

Melting Completion (Liquidus)

1460 *°C* 2660 *°F*

Melting Onset (Solidus)

1420 *°C* 2580 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

16 *W/m-K* 9.5 *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

16 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

47 *MJ/kg* 20 *x 10 ^{3} BTU/lb*

Embodied Water

130 *L/kg* 16 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

27

Resilience: Ultimate (Unit Rupture Work)

190 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

4100 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

25 *points*

Strength to Weight: Axial

53 *points*

Strength to Weight: Bending

37 *points*

Thermal Diffusivity

4.4 *mm ^{2}/s*

Thermal Shock Resistance

49 *points*

## Alloy Composition

Fe | 73.2 to 77.7 | |

Cr | 15 to 16 | |

Ni | 4.0 to 5.0 | |

Mo | 2.5 to 3.2 | |

Mn | 0.5 to 1.3 | |

Nb | 0.1 to 0.5 | |

Si | 0 to 0.5 | |

C | 0.1 to 0.15 | |

N | 0.070 to 0.13 | |

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 A693: Standard Specification for Precipitation-Hardening Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

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