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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

Iron (Fe) 96.7 to 98.5
Manganese (Mn) 1.3 to 1.7
Carbon (C) 0.25 to 0.32
Silicon (Si) 0 to 0.4
Chromium (Cr) 0 to 0.4
Nickel (Ni) 0 to 0.4
Molybdenum (Mo) 0 to 0.1
Phosphorus (P) 0 to 0.035
Sulfur (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