EN 1.3551 (80MoCrV42-16) High-Temperature Bearing Steel
EN 1.3551 steel is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the spheroidized condition. 1.3551 is the EN numeric designation for this material. 80MoCrV42-16 is the EN chemical designation.
It has a very high melting temperature among EN wrought alloy steels. In addition, it has a very high base cost and a very high embodied energy.
The graph bars on the material properties cards below compare EN 1.3551 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
220
Elastic (Young's, Tensile) Modulus
190 GPa 28 x 106 psi
Poisson's Ratio
0.29
Shear Modulus
75 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
720 MPa 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
530 °C 990 °F
Melting Completion (Liquidus)
1490 °C 2710 °F
Melting Onset (Solidus)
1450 °C 2640 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
36 W/m-K 21 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
8.6 % IACS
Electrical Conductivity: Equal Weight (Specific)
9.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.0 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
4.9 kg CO2/kg material
Embodied Energy
71 MJ/kg 31 x 103 BTU/lb
Embodied Water
82 L/kg 9.8 gal/lb
Common Calculations
PREN (Pitting Resistance)
18
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
26 points
Strength to Weight: Bending
23 points
Thermal Diffusivity
9.8 mm2/s
Thermal Shock Resistance
21 points
Alloy Composition
Among alloy steels, the composition of EN 1.3551 steel is notable for including tungsten (W) and containing a comparatively high amount of chromium (Cr). Tungsten interacts with other alloying elements to a greater extent than usual, which makes it hard to broadly characterize its effects. Chromium is used to improve corrosion resistance and most mechanical properties (particularly at higher temperatures).
| Fe | 88.8 to 91.1 | |
| Mo | 4.0 to 4.5 | |
| Cr | 3.9 to 4.3 | |
| V | 0.9 to 1.1 | |
| C | 0.77 to 0.85 | |
| Mn | 0.15 to 0.35 | |
| Si | 0 to 0.4 | |
| Cu | 0 to 0.3 | |
| W | 0 to 0.25 | |
| P | 0 to 0.025 | |
| S | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ISO 683-17: Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015