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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

Iron (Fe) 96.1 to 98.4
Manganese (Mn) 1.3 to 1.7
Silicon (Si) 0.1 to 0.5
Nickel (Ni) 0 to 0.4
Carbon (C) 0.16 to 0.22
Chromium (Cr) 0 to 0.3
Copper (Cu) 0 to 0.3
Vanadium (V) 0.080 to 0.15
Molybdenum (Mo) 0 to 0.080
Niobium (Nb) 0 to 0.070
Aluminum (Al) 0.010 to 0.050
Titanium (Ti) 0 to 0.050
Sulfur (S) 0 to 0.035
Phosphorus (P) 0 to 0.030
Nitrogen (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