EN 1.7216 (30CrMo4) Chromium-Molybdenum Steel
EN 1.7216 steel is an alloy steel formulated for primary forming into wrought products. 1.7216 is the EN numeric designation for this material. 30CrMo4 is the EN chemical designation. It has a moderately low electrical conductivity among the EN wrought alloy steels in the database.
The properties of EN 1.7216 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 1.7216 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
200 to 280
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
12 to 23 %
Fatigue Strength
290 to 440 MPa 41 to 63 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
410 to 560 MPa 60 to 81 x 103 psi
Tensile Strength: Ultimate (UTS)
650 to 930 MPa 94 to 140 x 103 psi
Tensile Strength: Yield (Proof)
400 to 690 MPa 58 to 100 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 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
46 W/m-K 26 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.2 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.3 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.4 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.5 kg CO2/kg material
Embodied Energy
20 MJ/kg 8.5 x 103 BTU/lb
Embodied Water
50 L/kg 6.0 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
110 to 130 MJ/m3
Resilience: Unit (Modulus of Resilience)
430 to 1280 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
23 to 33 points
Strength to Weight: Bending
21 to 27 points
Thermal Diffusivity
12 mm2/s
Thermal Shock Resistance
19 to 27 points
Alloy Composition
Among alloy steels, the composition of EN 1.7216 steel is notable for containing comparatively high amounts of chromium (Cr) and manganese (Mn). Chromium is used to improve corrosion resistance and most mechanical properties (particularly at higher temperatures). Manganese is used to improve hardenability, hot workability, and surface quality. There is some loss of ductility and weldability, however.
| Fe | 97.2 to 98.4 | |
| Cr | 0.8 to 1.2 | |
| Mn | 0.35 to 0.6 | |
| C | 0.27 to 0.34 | |
| Mo | 0.15 to 0.3 | |
| Si | 0 to 0.35 | |
| P | 0 to 0.035 | |
| S | 0 to 0.035 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10297-1: Seamless circular steel tubes for mechanical and general engineering purposes - Technical delivery conditions - Part 1: Non-alloy and alloy steel tubes
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