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SAE-AISI M4 Steel vs. S24000 Stainless Steel

Both SAE-AISI M4 steel and S24000 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is S24000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
770

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
1390
Melting Onset (Solidus), °C 1560
1350
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 25
12
Density, g/cm3 8.3
7.6
Embodied Carbon, kg CO2/kg material 14
2.7
Embodied Energy, MJ/kg 210
39
Embodied Water, L/kg 110
150

Common Calculations

PREN (Pitting Resistance) 30
23
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
28
Strength to Weight: Bending, points 23 to 45
24
Thermal Shock Resistance, points 24 to 68
16

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.080
Chromium (Cr), % 3.8 to 4.8
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
61.5 to 69
Manganese (Mn), % 0.15 to 0.4
11.5 to 14.5
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.2 to 0.45
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0