Hardened (+H) 1.7149 Steel
EN 1.7149 +H steel is EN 1.7149 steel in the hardened (H) condition. It has the highest strength compared to the other variants of EN 1.7149 steel. The graph bars on the material properties cards below compare EN 1.7149 +H 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
45
Shear Modulus
73 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
1460 MPa 210 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
420 °C 800 °F
Melting Completion (Liquidus)
1460 °C 2660 °F
Melting Onset (Solidus)
1420 °C 2580 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
46 W/m-K 27 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.4 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.3 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.5 kg CO2/kg material
Embodied Energy
19 MJ/kg 8.3 x 103 BTU/lb
Embodied Water
52 L/kg 6.2 gal/lb
Common Calculations
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
52 points
Strength to Weight: Bending
36 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
42 points
Alloy Composition
| Fe | 96.5 to 97.7 | |
| Mn | 1.1 to 1.4 | |
| Cr | 1.0 to 1.3 | |
| C | 0.17 to 0.22 | |
| Si | 0 to 0.3 | |
| Cu | 0 to 0.25 | |
| S | 0.020 to 0.040 | |
| P | 0 to 0.025 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 10263-3: Steel rod, bars and wire for cold heading and cold extrusion - Part 3: Technical delivery conditions for case hardening steels
Welding Metallurgy, 2nd ed., Sindo Kou, 2003
ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996
Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015