EN 1.1181 (C35E) Non-Alloy Steel
EN 1.1181 steel is a carbon (non-alloy) steel formulated for primary forming into wrought products. 1.1181 is the EN numeric designation for this material. C35E is the EN chemical designation. It has a very low thermal conductivity among the wrought carbon or non-alloy steels in the database.
The properties of EN 1.1181 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 1.1181 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
160 to 180
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
19 to 20 %
Fatigue Strength
190 to 260 MPa 28 to 38 x 103 psi
Impact Strength: V-Notched Charpy
23 to 38 J 17 to 28 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
350 to 390 MPa 51 to 56 x 103 psi
Tensile Strength: Ultimate (UTS)
560 to 620 MPa 81 to 89 x 103 psi
Tensile Strength: Yield (Proof)
280 to 380 MPa 41 to 55 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 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
42 W/m-K 24 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.1 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.4 kg CO2/kg material
Embodied Energy
19 MJ/kg 8.2 x 103 BTU/lb
Embodied Water
47 L/kg 5.6 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
90 to 110 MJ/m3
Resilience: Unit (Modulus of Resilience)
210 to 380 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
20 to 22 points
Strength to Weight: Bending
19 to 21 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
19 to 21 points
Alloy Composition
| Fe | 97.4 to 99.18 | |
| Mn | 0.5 to 0.8 | |
| C | 0.32 to 0.39 | |
| 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
EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Creep-Resistant Steels, Fujio Abe et al. (editors), 2008
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