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EN 1.1170 Steel vs. SAE-AISI 5155 Steel

Both EN 1.1170 steel and SAE-AISI 5155 steel are iron alloys. Their average alloy composition is basically identical. 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 1.1170 steel and the bottom bar is SAE-AISI 5155 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16 to 17
21
Fatigue Strength, MPa 220 to 330
260
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 390 to 450
390
Tensile Strength: Ultimate (UTS), MPa 640 to 730
620
Tensile Strength: Yield (Proof), MPa 330 to 500
380

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
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 50
49
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.3

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 670
380
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 26
22
Strength to Weight: Bending, points 21 to 23
21
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 20 to 23
20

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.51 to 0.59
Chromium (Cr), % 0 to 0.4
0.7 to 0.9
Iron (Fe), % 96.7 to 98.5
97.2 to 97.9
Manganese (Mn), % 1.3 to 1.7
0.7 to 0.9
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.040