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EN 1.5113 (8MnSi7) Silicon Steel

EN 1.5113 steel is an alloy steel formulated for primary forming into wrought products. 1.5113 is the EN numeric designation for this material. 8MnSi7 is the EN chemical designation.

It has a very high thermal conductivity among EN wrought alloy steels. In addition, it has a moderately low embodied energy and a moderately low melting temperature.

The properties of EN 1.5113 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.5113 steel to: EN wrought 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

170 to 270

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

11 to 18 %

Fatigue Strength

220 to 470 MPa 31 to 69 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

72 GPa 11 x 106 psi

Shear Strength

360 to 540 MPa 52 to 78 x 103 psi

Tensile Strength: Ultimate (UTS)

580 to 900 MPa 84 to 130 x 103 psi

Tensile Strength: Yield (Proof)

320 to 770 MPa 46 to 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

400 °C 750 °F

Melting Completion (Liquidus)

1450 °C 2640 °F

Melting Onset (Solidus)

1410 °C 2570 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

52 W/m-K 30 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

2.0 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.4 kg CO2/kg material

Embodied Energy

19 MJ/kg 8.2 x 103 BTU/lb

Embodied Water

48 L/kg 5.7 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

91 to 96 MJ/m3

Resilience: Unit (Modulus of Resilience)

270 to 1570 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

21 to 32 points

Strength to Weight: Bending

20 to 27 points

Thermal Diffusivity

14 mm2/s

Thermal Shock Resistance

17 to 26 points

Alloy Composition

Among alloy steels, the composition of EN 1.5113 steel is notable for containing a comparatively high amount of manganese (Mn). Manganese is used to improve hardenability, hot workability, and surface quality. There is some loss of ductility and weldability, however.

Iron (Fe) 97 to 97.5
Manganese (Mn) 1.6 to 1.8
Silicon (Si) 0.9 to 1.1
Carbon (C) 0 to 0.1
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.025

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

Followup Questions

Similar Alloys

Further Reading

EN 10263-2: Steel rod, bars and wire for cold heading and cold extrusion - Part 2: Technical delivery conditions for steels not intended for heat treatment after cold working

Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005

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

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