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EN 1.7216 Steel vs. SAE-AISI 5155 Steel

Both EN 1.7216 steel and SAE-AISI 5155 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 5155 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 280
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 23
21
Fatigue Strength, MPa 290 to 440
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 410 to 560
390
Tensile Strength: Ultimate (UTS), MPa 650 to 930
620
Tensile Strength: Yield (Proof), MPa 400 to 690
380

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
420
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
49
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
110
Resilience: Unit (Modulus of Resilience), kJ/m3 430 to 1280
380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 33
22
Strength to Weight: Bending, points 21 to 27
21
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 19 to 27
20

Alloy Composition

Carbon (C), % 0.27 to 0.34
0.51 to 0.59
Chromium (Cr), % 0.8 to 1.2
0.7 to 0.9
Iron (Fe), % 97.2 to 98.4
97.2 to 97.9
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