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EN 1.4945 Stainless Steel vs. SAE-AISI M33 Steel

Both EN 1.4945 stainless steel and SAE-AISI M33 steel are iron alloys. They have 68% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.4945 stainless steel and the bottom bar is SAE-AISI M33 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 640 to 740
810 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1490
1550
Melting Onset (Solidus), °C 1440
1500
Specific Heat Capacity, J/kg-K 470
440
Thermal Conductivity, W/m-K 14
20
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 30
32
Density, g/cm3 8.1
8.2
Embodied Carbon, kg CO2/kg material 5.0
7.7
Embodied Energy, MJ/kg 73
110
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 23
38
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 25
27 to 75
Strength to Weight: Bending, points 20 to 22
24 to 46
Thermal Diffusivity, mm2/s 3.7
5.5
Thermal Shock Resistance, points 14 to 16
25 to 68

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.85 to 0.92
Chromium (Cr), % 15.5 to 17.5
3.5 to 4.0
Cobalt (Co), % 0
7.8 to 8.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 57.9 to 65.7
71.4 to 76.3
Manganese (Mn), % 0 to 1.5
0.15 to 0.4
Molybdenum (Mo), % 0
9.0 to 10
Nickel (Ni), % 15.5 to 17.5
0 to 0.3
Niobium (Nb), % 0.4 to 1.2
0
Nitrogen (N), % 0.060 to 0.14
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0.15 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 2.5 to 3.5
1.3 to 2.1
Vanadium (V), % 0
1.0 to 1.4