# EN 1.1121 (C10E) Non-Alloy Steel

EN 1.1121 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 1.1121 is the EN numeric designation for this material. C10E is the EN chemical designation.

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

The graph bars on the material properties cards below compare EN 1.1121 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

120

Elastic (Young's, Tensile) Modulus

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

Elongation at Break

28 *%*

Fatigue Strength

160 *MPa* 23 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

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

Shear Strength

260 *MPa* 37 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

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

Tensile Strength: Yield (Proof)

210 *MPa* 30 *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* 2670 *°F*

Melting Onset (Solidus)

1420 *°C* 2590 *°F*

Specific Heat Capacity

470 *J/kg-K* 0.11 *BTU/lb-°F*

Thermal Conductivity

53 *W/m-K* 31 *BTU/h-ft-°F*

Thermal Expansion

12 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

7.0 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

8.0 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

1.8 *% relative*

Density

7.8 *g/cm ^{3}* 490

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

18 *MJ/kg* 7.8 *x 10 ^{3} BTU/lb*

Embodied Water

45 *L/kg* 5.4 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

93 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

110 *kJ/m ^{3}*

Stiffness to Weight: Axial

13 *points*

Stiffness to Weight: Bending

24 *points*

Strength to Weight: Axial

14 *points*

Strength to Weight: Bending

15 *points*

Thermal Diffusivity

14 *mm ^{2}/s*

Thermal Shock Resistance

13 *points*

## Alloy Composition

Fe | 98.8 to 99.63 | |

Mn | 0.3 to 0.6 | |

Si | 0 to 0.4 | |

C | 0.070 to 0.13 | |

P | 0 to 0.035 | |

S | 0 to 0.035 |

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

## Followup Questions

## Similar Alloys

## Further Reading

EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes

Carbon Steel Handbook, D. Gandy, 2007

ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996

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

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