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Annealed (+A) 1.7366 Steel

EN 1.7366 +A steel is EN 1.7366 steel in the annealed condition. The graph bars on the material properties cards below compare EN 1.7366 +A 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

140

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

19 %

Fatigue Strength

160 MPa 23 x 103 psi

Impact Strength: V-Notched Charpy

38 J 28 ft-lb

Poisson's Ratio

0.29

Shear Modulus

74 GPa 11 x 106 psi

Shear Strength

290 MPa 42 x 103 psi

Tensile Strength: Ultimate (UTS)

460 MPa 67 x 103 psi

Tensile Strength: Yield (Proof)

230 MPa 34 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

510 °C 950 °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

8.1 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.3 % IACS

Otherwise Unclassified Properties

Base Metal Price

4.3 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.7 kg CO2/kg material

Embodied Energy

23 MJ/kg 10 x 103 BTU/lb

Embodied Water

69 L/kg 8.2 gal/lb

Common Calculations

PREN (Pitting Resistance)

6.8

Resilience: Ultimate (Unit Rupture Work)

74 MJ/m3

Resilience: Unit (Modulus of Resilience)

140 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

16 points

Strength to Weight: Bending

17 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

13 points

Alloy Composition

Iron (Fe)Fe 91.9 to 95.3
Chromium (Cr)Cr 4.0 to 6.0
Manganese (Mn)Mn 0.3 to 0.8
Molybdenum (Mo)Mo 0.45 to 0.65
Silicon (Si)Si 0 to 0.4
Carbon (C)C 0 to 0.18
Phosphorus (P)P 0 to 0.025
Sulfur (S)S 0 to 0.015

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

EN 10222-2: Steel forgings for pressure purposes - Part 2: Ferritic and martensitic steels with specified elevated temperature properties

Welding Metallurgy, 2nd ed., Sindo Kou, 2003

Creep-Resistant Steels, Fujio Abe et al. (editors), 2008

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