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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 106 psi

Elongation at Break

28 %

Fatigue Strength

160 MPa 23 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

260 MPa 37 x 103 psi

Tensile Strength: Ultimate (UTS)

400 MPa 58 x 103 psi

Tensile Strength: Yield (Proof)

210 MPa 30 x 103 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/cm3 490 lb/ft3

Embodied Carbon

1.4 kg CO2/kg material

Embodied Energy

18 MJ/kg 7.8 x 103 BTU/lb

Embodied Water

45 L/kg 5.4 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

93 MJ/m3

Resilience: Unit (Modulus of Resilience)

110 kJ/m3

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 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Iron (Fe) 98.8 to 99.63
Manganese (Mn) 0.3 to 0.6
Silicon (Si) 0 to 0.4
Carbon (C) 0.070 to 0.13
Phosphorus (P) 0 to 0.035
Sulfur (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