Core Hardened (+CH) 1.8151 Steel
EN 1.8151 +CH steel is EN 1.8151 steel in the core hardened (CH) condition. The graph bars on the material properties cards below compare EN 1.8151 +CH 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
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Poisson's Ratio
0.29
Rockwell C Hardness
49
Shear Modulus
72 GPa 10 x 106 psi
Tensile Strength: Ultimate (UTS)
1570 MPa 230 x 103 psi
Thermal Properties
Latent Heat of Fusion
270 J/g
Maximum Temperature: Mechanical
410 °C 770 °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
50 W/m-K 29 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
2.2 % relative
Density
7.7 g/cm3 480 lb/ft3
Embodied Carbon
1.8 kg CO2/kg material
Embodied Energy
25 MJ/kg 11 x 103 BTU/lb
Embodied Water
49 L/kg 5.9 gal/lb
Common Calculations
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
56 points
Strength to Weight: Bending
39 points
Thermal Diffusivity
14 mm2/s
Thermal Shock Resistance
47 points
Alloy Composition
| Fe | 95.9 to 97.2 | |
| Si | 1.3 to 1.7 | |
| Mn | 0.6 to 0.9 | |
| Cr | 0.4 to 0.8 | |
| C | 0.4 to 0.5 | |
| V | 0.1 to 0.2 | |
| P | 0 to 0.025 | |
| S | 0 to 0.025 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 10089: Hot rolled steels for quenched and tempered springs - Technical delivery conditions
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