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SAE-AISI M4 Steel vs. N08135 Stainless Steel

Both SAE-AISI M4 steel and N08135 stainless steel are iron alloys. They have 46% of their average alloy composition in common. There are 20 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 N08135 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
80
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
570

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1610
1440
Melting Onset (Solidus), °C 1560
1390
Specific Heat Capacity, J/kg-K 440
460
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
39
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 14
6.8
Embodied Energy, MJ/kg 210
94
Embodied Water, L/kg 110
220

Common Calculations

PREN (Pitting Resistance) 30
38
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 Shock Resistance, points 24 to 68
13

Alloy Composition

Carbon (C), % 1.3 to 1.4
0 to 0.030
Chromium (Cr), % 3.8 to 4.8
20.5 to 23.5
Copper (Cu), % 0 to 0.25
0 to 0.7
Iron (Fe), % 75.9 to 81.4
30.2 to 42.3
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.3 to 5.5
4.0 to 5.0
Nickel (Ni), % 0 to 0.3
33 to 38
Phosphorus (P), % 0 to 0.030
0 to 0.030
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
0.2 to 0.8
Vanadium (V), % 3.8 to 4.5
0