EN 1.3520 (100CrMnSi6-4) Through-Hardening Bearing Steel
EN 1.3520 steel is an alloy steel formulated for primary forming into wrought products. 1.3520 is the EN numeric designation for this material. 100CrMnSi6-4 is the EN chemical designation. It has a very low melting temperature among the EN wrought alloy steels in the database.
The properties of EN 1.3520 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 1.3520 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
190 to 220
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Poisson's Ratio
0.29
Shear Modulus
72 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
620 to 730 MPa 90 to 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
430 °C 810 °F
Melting Completion (Liquidus)
1440 °C 2630 °F
Melting Onset (Solidus)
1400 °C 2550 °F
Specific Heat Capacity
480 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
43 W/m-K 25 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.6 % relative
Density
7.8 g/cm3 480 lb/ft3
Embodied Carbon
1.5 kg CO2/kg material
Embodied Energy
20 MJ/kg 8.8 x 103 BTU/lb
Embodied Water
54 L/kg 6.4 gal/lb
Common Calculations
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
22 to 26 points
Strength to Weight: Bending
21 to 23 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
18 to 22 points
Alloy Composition
Among alloy steels, the composition of EN 1.3520 steel is notable for containing comparatively high amounts of carbon (C) and manganese (Mn). Carbon is used to increase strength at the cost of a decrease in formability. Manganese is used to improve hardenability, hot workability, and surface quality. There is some loss of ductility and weldability, however.
| Fe | 95.9 to 97.2 | |
| Cr | 1.4 to 1.7 | |
| Mn | 1.0 to 1.2 | |
| C | 0.93 to 1.1 | |
| Si | 0.45 to 0.75 | |
| Cu | 0 to 0.3 | |
| Mo | 0 to 0.1 | |
| Al | 0 to 0.050 | |
| S | 0 to 0.030 | |
| P | 0 to 0.025 | |
| O | 0 to 0.0015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ISO 683-17: Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels
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