# EN 1.0540 (C50) Non-Alloy Steel

EN 1.0540 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. Cited properties are appropriate for the normalized condition. 1.0540 is the EN numeric designation for this material. C50 is the EN chemical designation.

It has a moderately low thermal conductivity among wrought carbon or non-alloy steels. In addition, it has a moderately low ductility and a moderately high tensile strength.

The graph bars on the material properties cards below compare EN 1.0540 steel to: wrought carbon or non-alloy 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

190

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

14 *%*

Fatigue Strength

210 *MPa* 31 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

400 *MPa* 58 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

660 *MPa* 96 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

330 *MPa* 48 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

250 *J/g*

Maximum Temperature: Mechanical

400 *°C* 750 *°F*

Melting Completion (Liquidus)

1460 *°C* 2650 *°F*

Melting Onset (Solidus)

1420 *°C* 2580 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

48 *W/m-K* 28 *BTU/h-ft-°F*

Thermal Expansion

12 *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

2.1 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

19 *MJ/kg* 8.2 *x 10 ^{3} BTU/lb*

Embodied Water

47 *L/kg* 5.6 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

75 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

290 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

23 *points*

Strength to Weight: Bending

22 *points*

Thermal Diffusivity

13 *mm ^{2}/s*

Thermal Shock Resistance

21 *points*

## Alloy Composition

Fe | 97.2 to 98.9 | |

Mn | 0.6 to 0.9 | |

C | 0.47 to 0.55 | |

Si | 0 to 0.4 | |

Cr | 0 to 0.4 | |

Ni | 0 to 0.4 | |

Mo | 0 to 0.1 | |

P | 0 to 0.045 | |

S | 0 to 0.045 |

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

## Followup Questions

## Similar Alloys

## Further Reading

EN 10250-2: Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and special steels

Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004

Carbon Steel Handbook, D. Gandy, 2007

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

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