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SAE-AISI M30 Steel vs. S44625 Stainless Steel

Both SAE-AISI M30 steel and S44625 stainless steel are iron alloys. They have 78% 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 M30 steel and the bottom bar is S44625 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 800 to 2170
590

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1550
1440
Melting Onset (Solidus), °C 1500
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 24
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 26
14
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.2
2.8
Embodied Energy, MJ/kg 100
39
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 35
30
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 74
21
Strength to Weight: Bending, points 24 to 46
20
Thermal Diffusivity, mm2/s 6.6
4.6
Thermal Shock Resistance, points 25 to 67
19

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.010
Chromium (Cr), % 3.5 to 4.3
25 to 27.5
Cobalt (Co), % 4.5 to 5.5
0
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 75.2 to 80.9
69.4 to 74.3
Manganese (Mn), % 0.15 to 0.4
0 to 0.4
Molybdenum (Mo), % 7.8 to 9.0
0.75 to 1.5
Nickel (Ni), % 0 to 0.3
0 to 0.5
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.45
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 1.3 to 2.3
0
Vanadium (V), % 1.0 to 1.4
0