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EN 1.1127 (38Mn6) Non-Alloy Steel

EN 1.1127 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1.1127 is the EN numeric designation for this material. 38Mn6 is the EN chemical designation.

It can have a moderately high tensile strength among wrought carbon or non-alloy steels. In addition, it has a moderately high electrical conductivity and a moderately low thermal conductivity.

The properties of EN 1.1127 steel include three common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.1127 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

190 to 230

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

14 to 25 %

Fatigue Strength

280 to 370 MPa 40 to 53 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

420 to 480 MPa 61 to 69 x 103 psi

Tensile Strength: Ultimate (UTS)

660 to 790 MPa 96 to 110 x 103 psi

Tensile Strength: Yield (Proof)

410 to 580 MPa 59 to 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 2650 °F

Melting Onset (Solidus)

1410 °C 2580 °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

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)

90 to 140 MJ/m3

Resilience: Unit (Modulus of Resilience)

440 to 880 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

23 to 28 points

Strength to Weight: Bending

22 to 24 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

21 to 25 points

Alloy Composition

Iron (Fe) 96.6 to 98.1
Manganese (Mn) 1.4 to 1.7
Carbon (C) 0.34 to 0.42
Silicon (Si) 0.15 to 0.35
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 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

ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996

Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008

Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015