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SAE-AISI M6 Steel vs. S17400 Stainless Steel

Both SAE-AISI M6 steel and S17400 stainless steel are iron alloys. They have 77% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M6 steel and the bottom bar is S17400 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 77
75
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
910 to 1390

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1560
1440
Melting Onset (Solidus), °C 1510
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 17
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 39
14
Density, g/cm3 8.4
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.7
Embodied Energy, MJ/kg 120
39
Embodied Water, L/kg 160
130

Common Calculations

PREN (Pitting Resistance) 28
16
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28 to 73
32 to 49
Strength to Weight: Bending, points 24 to 45
27 to 35
Thermal Diffusivity, mm2/s 4.7
4.5
Thermal Shock Resistance, points 26 to 68
30 to 46

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.070
Chromium (Cr), % 3.8 to 4.5
15 to 17
Cobalt (Co), % 11 to 13
0
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 68.8 to 74.6
70.4 to 78.9
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0
3.0 to 5.0
Niobium (Nb), % 0
0.15 to 0.45
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0