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EN 1.7221 Steel vs. EN 1.5450 Steel

Both EN 1.7221 steel and EN 1.5450 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.7221 steel and the bottom bar is EN 1.5450 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
19
Fatigue Strength, MPa 290 to 390
310
Impact Strength: V-Notched Charpy, J 20 to 38
38
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 650 to 780
620
Tensile Strength: Yield (Proof), MPa 430 to 630
460

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 44
49
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
20
Embodied Water, L/kg 51
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 98
110
Resilience: Unit (Modulus of Resilience), kJ/m3 490 to 1050
550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
22
Strength to Weight: Bending, points 21 to 24
20
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 19 to 23
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.060
Boron (B), % 0
0.0020 to 0.0060
Carbon (C), % 0.22 to 0.29
0.060 to 0.1
Chromium (Cr), % 0.8 to 1.2
0 to 0.2
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.8 to 98.3
97.6 to 98.8
Manganese (Mn), % 0.5 to 0.8
0.6 to 0.8
Molybdenum (Mo), % 0.15 to 0.3
0.4 to 0.5
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.6
0.1 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.060