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SAE-AISI 81B45 Steel vs. EN 1.3538 Steel

Both SAE-AISI 81B45 steel and EN 1.3538 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 81B45 steel and the bottom bar is EN 1.3538 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 200
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 540 to 670
670 to 740

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
440
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 40
41
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
3.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.6
Embodied Energy, MJ/kg 20
21
Embodied Water, L/kg 49
56

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 24
24 to 26
Strength to Weight: Bending, points 19 to 22
22 to 23
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 17 to 21
20 to 22

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0.93 to 1.1
Chromium (Cr), % 0.35 to 0.55
1.7 to 2.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 97 to 98
96 to 97.2
Manganese (Mn), % 0.75 to 1.0
0.6 to 0.8
Molybdenum (Mo), % 0.080 to 0.15
0.4 to 0.5
Nickel (Ni), % 0.2 to 0.4
0
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.030