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SAE-AISI M47 Steel vs. S31730 Stainless Steel

Both SAE-AISI M47 steel and S31730 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M47 steel and the bottom bar is S31730 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 77
77
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
540

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1540
1430
Melting Onset (Solidus), °C 1500
1390
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 26
24
Density, g/cm3 8.1
8.0
Embodied Carbon, kg CO2/kg material 7.4
4.6
Embodied Energy, MJ/kg 100
63
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 38
30
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
19
Strength to Weight: Bending, points 24 to 48
18
Thermal Shock Resistance, points 27 to 77
12

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.030
Chromium (Cr), % 3.5 to 4.0
17 to 19
Cobalt (Co), % 4.8 to 5.3
0
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 78.7 to 85
52.4 to 61
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 9.3 to 10
3.0 to 4.0
Nickel (Ni), % 0 to 0.3
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
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 0.010
Tungsten (W), % 1.3 to 1.8
0
Vanadium (V), % 1.2 to 1.4
0