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SAE-AISI M50 Steel vs. S17700 Stainless Steel

Both SAE-AISI M50 steel and S17700 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 24 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 M50 steel and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
1180 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1440
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 35
15
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.7
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 5.1
2.8
Embodied Energy, MJ/kg 74
40
Embodied Water, L/kg 83
150

Common Calculations

PREN (Pitting Resistance) 19
17
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 80
42 to 59
Strength to Weight: Bending, points 23 to 49
32 to 40
Thermal Diffusivity, mm2/s 9.7
4.1
Thermal Shock Resistance, points 21 to 66
39 to 54

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.5
Carbon (C), % 0.78 to 0.88
0 to 0.090
Chromium (Cr), % 3.8 to 4.5
16 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.4
70.5 to 76.8
Manganese (Mn), % 0.15 to 0.45
0 to 1.0
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
6.5 to 7.8
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.3
0

Comparable Variants