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EN 1.3521 (17MnCr5) Case-Hardening Bearing Steel

EN 1.3521 steel is an alloy steel formulated for primary forming into wrought products. 1.3521 is the EN numeric designation for this material. 17MnCr5 is the EN chemical designation. It has a moderately low embodied energy among the EN wrought alloy steels in the database.

The properties of EN 1.3521 steel include five 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 1.3521 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.

Annealed (+A) 1.3521 Steel F-P Annealed (+FP) 1.3521 Steel

Hardened (+H) 1.3521 Steel Heat Treated (+TH) 1.3521 Steel

Spheroidized (+AC) 1.3521 Steel

Mechanical Properties

Brinell Hardness

150 to 180

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 10⁶ psi

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 10⁶ psi

Tensile Strength: Ultimate (UTS)

490 to 1390 MPa 70 to 200 x 10³ psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

420 °C 790 °F

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1420 °C 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

45 W/m-K 26 BTU/h-ft-°F

Thermal Expansion

13 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

2.3 % 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

52 L/kg 6.1 gal/lb

Common Calculations

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

17 to 49 points

Strength to Weight: Bending

18 to 35 points

Thermal Diffusivity

12 mm²/s

Thermal Shock Resistance

14 to 41 points

Alloy Composition

Among alloy steels, the composition of EN 1.3521 steel is notable for containing a comparatively high amount of manganese (Mn) and including aluminum (Al). Manganese is used to improve hardenability, hot workability, and surface quality. There is some loss of ductility and weldability, however. Aluminum is used to control grain size and to deoxidize. Deoxidizing is required to control the effects of some other alloying elements.

Iron (Fe)Fe		96.8 to 98.2
Manganese (Mn)Mn		1.0 to 1.3
Chromium (Cr)Cr		0.8 to 1.1
Silicon (Si)Si		0 to 0.4
Carbon (C)C		0.14 to 0.19
Copper (Cu)Cu		0 to 0.3
Aluminum (Al)Al		0 to 0.050
Sulfur (S)S		0 to 0.030
Phosphorus (P)P		0 to 0.025
Oxygen (O)O		0 to 0.0020