EN 1.8897 (E420M) Steel
EN 1.8897 steel is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the thermomechanically rolled condition. 1.8897 is the EN numeric designation for this material. E420M is the EN chemical designation.
It has a moderately high thermal conductivity among EN wrought alloy steels. In addition, it has a moderately low base cost and a fairly low tensile strength.
The graph bars on the material properties cards below compare EN 1.8897 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
170
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
20 %
Fatigue Strength
320 MPa 46 x 103 psi
Impact Strength: V-Notched Charpy
46 J 34 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
350 MPa 51 x 103 psi
Tensile Strength: Ultimate (UTS)
560 MPa 81 x 103 psi
Tensile Strength: Yield (Proof)
460 MPa 66 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
400 °C 750 °F
Melting Completion (Liquidus)
1460 °C 2670 °F
Melting Onset (Solidus)
1420 °C 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
49 W/m-K 28 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.3 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.2 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.6 kg CO2/kg material
Embodied Energy
22 MJ/kg 9.3 x 103 BTU/lb
Embodied Water
48 L/kg 5.7 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 MJ/m3
Resilience: Unit (Modulus of Resilience)
550 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
13 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
Among alloy steels, the composition of EN 1.8897 steel is notable for including titanium (Ti) and niobium (Nb). Titanium is used to broadly improve mechanical properties. Niobium is primarily used to improve yield strength.
| Fe | 96.8 to 99.98 | |
| Mn | 0 to 1.7 | |
| Si | 0 to 0.5 | |
| Ni | 0 to 0.3 | |
| Mo | 0 to 0.2 | |
| C | 0 to 0.16 | |
| V | 0 to 0.12 | |
| Al | 0.020 to 0.060 | |
| Nb | 0 to 0.050 | |
| Ti | 0 to 0.050 | |
| P | 0 to 0.035 | |
| S | 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 10296-1: Welded circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
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