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SAE-AISI M42 Steel vs. S45503 Stainless Steel

Both SAE-AISI M42 steel and S45503 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M42 steel and the bottom bar is S45503 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
1610 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1490
1400
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
15
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 7.4
3.4
Embodied Energy, MJ/kg 100
48
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 38
13
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
57 to 65
Strength to Weight: Bending, points 24 to 48
39 to 43
Thermal Shock Resistance, points 25 to 71
56 to 64

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.010
Chromium (Cr), % 3.5 to 4.3
11 to 12.5
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
1.5 to 2.5
Iron (Fe), % 76.3 to 81
72.4 to 78.9
Manganese (Mn), % 0.15 to 0.4
0 to 0.5
Molybdenum (Mo), % 9.0 to 10
0 to 0.5
Nickel (Ni), % 0 to 0.3
7.5 to 9.5
Niobium (Nb), % 0
0.1 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0.15 to 0.65
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.0 to 1.4
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0