# Quenched and Tempered (+QT1) 1.4525 Stainless Steel

EN 1.4525 +QT1 steel is EN 1.4525 stainless steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.4525 +QT1 steel to: cast martensitic 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

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

Elongation at Break

13 *%*

Fatigue Strength

480 *MPa* 69 *x 10 ^{3} psi*

Impact Strength: V-Notched Charpy

23 *J* 17 *ft-lb*

Poisson's Ratio

0.28

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

1030 *MPa* 150 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

840 *MPa* 120 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

280 *J/g*

Maximum Temperature: Corrosion

430 *°C* 810 *°F*

Maximum Temperature: Mechanical

860 *°C* 1580 *°F*

Melting Completion (Liquidus)

1430 *°C* 2600 *°F*

Melting Onset (Solidus)

1390 *°C* 2530 *°F*

Specific Heat Capacity

480 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

18 *W/m-K* 10 *BTU/h-ft-°F*

Thermal Expansion

11 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

2.2 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

2.6 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

13 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

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

Embodied Water

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

## Common Calculations

PREN (Pitting Resistance)

18

Resilience: Ultimate (Unit Rupture Work)

130 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

1820 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

25 *points*

Strength to Weight: Axial

36 *points*

Strength to Weight: Bending

29 *points*

Thermal Diffusivity

4.7 *mm ^{2}/s*

Thermal Shock Resistance

34 *points*

## Alloy Composition

Fe | 70.4 to 79 | |

Cr | 15 to 17 | |

Ni | 3.5 to 5.5 | |

Cu | 2.5 to 4.0 | |

Mn | 0 to 1.0 | |

Si | 0 to 0.8 | |

Mo | 0 to 0.8 | |

Nb | 0 to 0.35 | |

C | 0 to 0.070 | |

N | 0 to 0.050 | |

P | 0 to 0.035 | |

S | 0 to 0.025 |

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

## Followup Questions

## Further Reading

EN 10283: Corrosion resistant steel castings

Corrosion of Stainless Steels, A. John Sedriks, 1996

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