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.
| Fe | 97 to 97.5 | |
| Mn | 1.6 to 1.8 | |
| Si | 0.9 to 1.1 | |
| C | 0 to 0.1 | |
| P | 0 to 0.025 | |
| 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