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EN 1.7231 Steel vs. SAE-AISI 5135 Steel

Both EN 1.7231 steel and SAE-AISI 5135 steel are iron alloys. Their average alloy composition is basically identical. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7231 steel and the bottom bar is SAE-AISI 5135 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240 to 280
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 12
22
Fatigue Strength, MPa 360 to 500
240
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 790 to 930
510
Tensile Strength: Yield (Proof), MPa 570 to 800
340

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
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
45
Thermal Expansion, µm/m-K 13
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 2.5
2.2
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 51
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 100
100
Resilience: Unit (Modulus of Resilience), kJ/m3 870 to 1700
300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 33
18
Strength to Weight: Bending, points 24 to 27
18
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 23 to 27
16

Alloy Composition

Carbon (C), % 0.38 to 0.45
0.33 to 0.38
Chromium (Cr), % 0.8 to 1.2
0.8 to 1.1
Iron (Fe), % 96.4 to 98.1
97.3 to 98.1
Manganese (Mn), % 0.6 to 1.0
0.6 to 0.8
Molybdenum (Mo), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040