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EN 1.7216 Steel vs. SAE-AISI 5145 Steel

Both EN 1.7216 steel and SAE-AISI 5145 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.7216 steel and the bottom bar is SAE-AISI 5145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 23
20
Fatigue Strength, MPa 290 to 440
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 410 to 560
350
Tensile Strength: Ultimate (UTS), MPa 650 to 930
560
Tensile Strength: Yield (Proof), MPa 400 to 690
370

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
47
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
19
Embodied Water, L/kg 50
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1280
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 33
20
Strength to Weight: Bending, points 21 to 27
19
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 19 to 27
17

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.43 to 0.48
Chromium (Cr), % 0.8 to 1.2
0.7 to 0.9
Iron (Fe), % 97.2 to 98.4
97.3 to 98
Manganese (Mn), % 0.35 to 0.6
0.7 to 0.9
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.040