# Quenched and Tempered (+QT1) 1.4107 Stainless Steel

EN 1.4107 +QT1 steel is EN 1.4107 stainless steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.4107 +QT1 steel to: cast ferritic 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

21 *%*

Fatigue Strength

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

Impact Strength: V-Notched Charpy

50 *J* 37 *ft-lb*

Poisson's Ratio

0.28

Shear Modulus

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

Tensile Strength: Ultimate (UTS)

620 *MPa* 89 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

400 *MPa* 59 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

270 *J/g*

Maximum Temperature: Corrosion

390 *°C* 730 *°F*

Maximum Temperature: Mechanical

740 *°C* 1360 *°F*

Melting Completion (Liquidus)

1450 *°C* 2640 *°F*

Melting Onset (Solidus)

1410 *°C* 2560 *°F*

Specific Heat Capacity

480 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

27 *W/m-K* 16 *BTU/h-ft-°F*

Thermal Expansion

10 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

2.9 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

3.3 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

7.5 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

30 *MJ/kg* 13 *x 10 ^{3} BTU/lb*

Embodied Water

100 *L/kg* 12 *gal/lb*

## Common Calculations

PREN (Pitting Resistance)

13

Resilience: Ultimate (Unit Rupture Work)

110 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

420 *kJ/m ^{3}*

Stiffness to Weight: Axial

14 *points*

Stiffness to Weight: Bending

25 *points*

Strength to Weight: Axial

22 *points*

Strength to Weight: Bending

21 *points*

Thermal Diffusivity

7.2 *mm ^{2}/s*

Thermal Shock Resistance

22 *points*

## Alloy Composition

Fe | 83.8 to 87.2 | |

Cr | 11.5 to 12.5 | |

Ni | 0.8 to 1.5 | |

Mn | 0.5 to 0.8 | |

Mo | 0 to 0.5 | |

Si | 0 to 0.4 | |

Cu | 0 to 0.3 | |

C | 0 to 0.1 | |

V | 0 to 0.080 | |

P | 0 to 0.030 | |

S | 0 to 0.020 |

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

## Followup Questions

## Further Reading

ISO 4991: Steel castings for pressure purposes

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