EN 1.7336 (13CrMoSi5-5) Chromium-Molybdenum Steel
EN 1.7336 steel is an alloy steel formulated for primary forming into wrought products. 1.7336 is the EN numeric designation for this material. 13CrMoSi5-5 is the EN chemical designation.
It has a moderately low thermal conductivity among EN wrought alloy steels. In addition, it has a moderately high base cost and a fairly low tensile strength.
The properties of EN 1.7336 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 1.7336 steel to: EN wrought 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
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
22 %
Fatigue Strength
240 to 310 MPa 35 to 45 x 103 psi
Impact Strength: V-Notched Charpy
39 to 46 J 29 to 34 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
370 MPa 54 x 103 psi
Tensile Strength: Ultimate (UTS)
590 MPa 85 to 86 x 103 psi
Tensile Strength: Yield (Proof)
340 to 440 MPa 50 to 63 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
430 °C 810 °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
40 W/m-K 23 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.5 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
3.1 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.6 kg CO2/kg material
Embodied Energy
21 MJ/kg 9.1 x 103 BTU/lb
Embodied Water
53 L/kg 6.4 gal/lb
Common Calculations
PREN (Pitting Resistance)
3.2
Resilience: Ultimate (Unit Rupture Work)
110 to 120 MJ/m3
Resilience: Unit (Modulus of Resilience)
310 to 510 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
17 points
Alloy Composition
Among alloy steels, the composition of EN 1.7336 steel is notable for including nitrogen (N). Nitrogen has a substantial strengthening effect, but may contribute to strain aging unless the steel is deoxidized with aluminum.
| Fe | 95.6 to 97.7 | |
| Cr | 1.0 to 1.5 | |
| Si | 0.5 to 0.8 | |
| Mo | 0.45 to 0.65 | |
| Mn | 0.4 to 0.65 | |
| Ni | 0 to 0.3 | |
| Cu | 0 to 0.3 | |
| C | 0 to 0.17 | |
| P | 0 to 0.015 | |
| N | 0 to 0.012 | |
| S | 0 to 0.0050 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10028-2: Flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties
Creep-Resistant Steels, Fujio Abe et al. (editors), 2008
Pressure Vessels: External Pressure Technology, 2nd ed., Carl T. F. Ross, 2011
ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996
Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015