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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.

Iron (Fe) 95.6 to 97.7
Chromium (Cr) 1.0 to 1.5
Silicon (Si) 0.5 to 0.8
Molybdenum (Mo) 0.45 to 0.65
Manganese (Mn) 0.4 to 0.65
Nickel (Ni) 0 to 0.3
Copper (Cu) 0 to 0.3
Carbon (C) 0 to 0.17
Phosphorus (P) 0 to 0.015
Nitrogen (N) 0 to 0.012
Sulfur (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