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
| Fe | 96.6 to 98.1 | |
| Mn | 1.4 to 1.7 | |
| C | 0.34 to 0.42 | |
| Si | 0.15 to 0.35 | |
| 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 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