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SAE-AISI 1137 Steel vs. SAE-AISI 81B45 Steel

Both SAE-AISI 1137 steel and SAE-AISI 81B45 steel are iron alloys. They have a very high 99% of their average alloy composition in common. 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 SAE-AISI 1137 steel and the bottom bar is SAE-AISI 81B45 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
160 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
12 to 24
Fatigue Strength, MPa 250 to 400
250 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 430 to 460
340 to 400
Tensile Strength: Ultimate (UTS), MPa 700 to 760
540 to 670
Tensile Strength: Yield (Proof), MPa 370 to 650
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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 51
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 48
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81 to 100
77 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 1130
320 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 27
19 to 24
Strength to Weight: Bending, points 22 to 24
19 to 22
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 21 to 23
17 to 21

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0.32 to 0.39
0.43 to 0.48
Chromium (Cr), % 0
0.35 to 0.55
Iron (Fe), % 97.8 to 98.3
97 to 98
Manganese (Mn), % 1.4 to 1.7
0.75 to 1.0
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0.080 to 0.13
0 to 0.040

Comparable Variants