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SAE-AISI M4 Steel vs. S35045 Stainless Steel

Both SAE-AISI M4 steel and S35045 stainless steel are iron alloys. They have 41% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is S35045 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
78
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
540

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1610
1390
Melting Onset (Solidus), °C 1560
1340
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
34
Density, g/cm3 8.3
8.0
Embodied Carbon, kg CO2/kg material 14
5.8
Embodied Energy, MJ/kg 210
83
Embodied Water, L/kg 110
230

Common Calculations

PREN (Pitting Resistance) 30
27
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 72
19
Strength to Weight: Bending, points 23 to 45
19
Thermal Diffusivity, mm2/s 6.9
3.2
Thermal Shock Resistance, points 24 to 68
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 1.3 to 1.4
0.060 to 0.1
Chromium (Cr), % 3.8 to 4.8
25 to 29
Copper (Cu), % 0 to 0.25
0 to 0.75
Iron (Fe), % 75.9 to 81.4
29.4 to 42.6
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
32 to 37
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0