EN 1.1170 (28Mn6) Non-Alloy Steel
EN 1.1170 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1.1170 is the EN numeric designation for this material. 28Mn6 is the EN chemical designation.
It has a moderately high electrical conductivity among wrought carbon or non-alloy steels. In addition, it can have a moderately high tensile strength and a moderately low ductility.
The properties of EN 1.1170 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.1170 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
180 to 210
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
16 to 17 %
Fatigue Strength
220 to 330 MPa 32 to 48 x 103 psi
Impact Strength: V-Notched Charpy
28 to 35 J 21 to 25 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
390 to 450 MPa 57 to 65 x 103 psi
Tensile Strength: Ultimate (UTS)
640 to 730 MPa 93 to 110 x 103 psi
Tensile Strength: Yield (Proof)
330 to 500 MPa 48 to 73 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
50 W/m-K 29 BTU/h-ft-°F
Thermal Expansion
12 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
2.1 % 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
49 L/kg 5.8 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
91 to 100 MJ/m3
Resilience: Unit (Modulus of Resilience)
290 to 670 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 to 26 points
Strength to Weight: Bending
21 to 23 points
Thermal Diffusivity
13 mm2/s
Thermal Shock Resistance
20 to 23 points
Alloy Composition
| Fe | 96.7 to 98.5 | |
| Mn | 1.3 to 1.7 | |
| C | 0.25 to 0.32 | |
| Si | 0 to 0.4 | |
| Cr | 0 to 0.4 | |
| Ni | 0 to 0.4 | |
| Mo | 0 to 0.1 | |
| P | 0 to 0.035 | |
| S | 0 to 0.035 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10250-2: Open die steel forgings for general engineering purposes - Part 2: Non-alloy quality and special steels
Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004
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