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SAE-AISI M30 Steel vs. S30415 Stainless Steel

Both SAE-AISI M30 steel and S30415 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 22 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 M30 steel and the bottom bar is S30415 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 78
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
670

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1550
1410
Melting Onset (Solidus), °C 1500
1370
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 24
21
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 26
15
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.2
3.1
Embodied Energy, MJ/kg 100
43
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 35
21
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 74
24
Strength to Weight: Bending, points 24 to 46
22
Thermal Diffusivity, mm2/s 6.6
5.6
Thermal Shock Resistance, points 25 to 67
15

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.040 to 0.060
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 3.5 to 4.3
18 to 19
Cobalt (Co), % 4.5 to 5.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.2 to 80.9
67.8 to 71.8
Manganese (Mn), % 0.15 to 0.4
0 to 0.8
Molybdenum (Mo), % 7.8 to 9.0
0
Nickel (Ni), % 0 to 0.3
9.0 to 10
Nitrogen (N), % 0
0.12 to 0.18
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.2 to 0.45
1.0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.3 to 2.3
0
Vanadium (V), % 1.0 to 1.4
0