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SAE-AISI M50 Steel vs. ASTM A242 HSLA Steel

Both SAE-AISI M50 steel and ASTM A242 HSLA steel are iron alloys. They have 89% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M50 steel and the bottom bar is ASTM A242 HSLA steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
490

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1440
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 35
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.9
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 5.1
1.4
Embodied Energy, MJ/kg 74
18
Embodied Water, L/kg 83
46

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26 to 80
17
Strength to Weight: Bending, points 23 to 49
17
Thermal Diffusivity, mm2/s 9.7
14
Thermal Shock Resistance, points 21 to 66
14

Alloy Composition

Carbon (C), % 0.78 to 0.88
0 to 0.15
Chromium (Cr), % 3.8 to 4.5
0
Copper (Cu), % 0 to 0.25
0.2 to 0.45
Iron (Fe), % 87 to 90.4
98.2 to 99.8
Manganese (Mn), % 0.15 to 0.45
0 to 1.0
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.15
Silicon (Si), % 0.2 to 0.6
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Vanadium (V), % 0.8 to 1.3
0