EN 1.0644 (E590K2) Non-Alloy Steel
EN 1.0644 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. Cited properties are appropriate for the quenched and tempered condition. 1.0644 is the EN numeric designation for this material. E590K2 is the EN chemical designation.
It has a very high embodied energy among wrought carbon or non-alloy steels. In addition, it has a fairly high base cost and a fairly low thermal conductivity.
The graph bars on the material properties cards below compare EN 1.0644 steel to: wrought carbon or non-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
200
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
17 %
Fatigue Strength
380 MPa 55 x 103 psi
Impact Strength: V-Notched Charpy
38 J 28 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
420 MPa 61 x 103 psi
Tensile Strength: Ultimate (UTS)
690 MPa 100 x 103 psi
Tensile Strength: Yield (Proof)
570 MPa 83 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C 750 °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
47 W/m-K 27 BTU/h-ft-°F
Thermal Expansion
12 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.4 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.8 kg CO2/kg material
Embodied Energy
24 MJ/kg 10 x 103 BTU/lb
Embodied Water
50 L/kg 6.0 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
870 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
22 points
Thermal Diffusivity
13 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
| Fe | 96.1 to 98.4 | |
| Mn | 1.3 to 1.7 | |
| Si | 0.1 to 0.5 | |
| Ni | 0 to 0.4 | |
| C | 0.16 to 0.22 | |
| Cr | 0 to 0.3 | |
| Cu | 0 to 0.3 | |
| V | 0.080 to 0.15 | |
| Mo | 0 to 0.080 | |
| Nb | 0 to 0.070 | |
| Al | 0.010 to 0.050 | |
| Ti | 0 to 0.050 | |
| S | 0 to 0.035 | |
| P | 0 to 0.030 | |
| N | 0 to 0.020 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
Carbon Steel Handbook, D. Gandy, 2007
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015