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SAE-AISI M4 Steel vs. S30615 Stainless Steel

Both SAE-AISI M4 steel and S30615 stainless steel are iron alloys. They have 66% 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 S30615 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 76
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
690

Thermal Properties

Latent Heat of Fusion, J/g 260
340
Melting Completion (Liquidus), °C 1610
1370
Melting Onset (Solidus), °C 1560
1320
Specific Heat Capacity, J/kg-K 440
500
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
19
Density, g/cm3 8.3
7.6
Embodied Carbon, kg CO2/kg material 14
3.7
Embodied Energy, MJ/kg 210
53
Embodied Water, L/kg 110
170

Common Calculations

PREN (Pitting Resistance) 30
18
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
25
Strength to Weight: Bending, points 23 to 45
23
Thermal Diffusivity, mm2/s 6.9
3.7
Thermal Shock Resistance, points 24 to 68
16

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.5
Carbon (C), % 1.3 to 1.4
0.16 to 0.24
Chromium (Cr), % 3.8 to 4.8
17 to 19.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
56.7 to 65.3
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 4.3 to 5.5
0
Nickel (Ni), % 0 to 0.3
13.5 to 16
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
3.2 to 4.0
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