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Annealed SAE-AISI M42 vs. Annealed S46500 Stainless Steel

Both annealed SAE-AISI M42 and annealed S46500 stainless steel are iron alloys. Both are furnished in the annealed condition. 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 annealed SAE-AISI M42 and the bottom bar is annealed S46500 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
1260

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1540
1450
Melting Onset (Solidus), °C 1490
1410
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
3.6
Embodied Energy, MJ/kg 100
51
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 38
15
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28
44
Strength to Weight: Bending, points 24
33
Thermal Shock Resistance, points 25
44

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.020
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
0
Iron (Fe), % 76.3 to 81
72.6 to 76.1
Manganese (Mn), % 0.15 to 0.4
0 to 0.25
Molybdenum (Mo), % 9.0 to 10
0.75 to 1.3
Nickel (Ni), % 0 to 0.3
10.7 to 11.3
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.15 to 0.65
0 to 0.25
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.5 to 1.8
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0