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SAE-AISI M42 Steel vs. AISI 445 Stainless Steel

Both SAE-AISI M42 steel and AISI 445 stainless steel are iron alloys. They have 83% 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 M42 steel and the bottom bar is AISI 445 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
78
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
480

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1490
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 20
21
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
12
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.4
2.6
Embodied Energy, MJ/kg 100
38
Embodied Water, L/kg 140
130

Common Calculations

PREN (Pitting Resistance) 38
20
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 79
17
Strength to Weight: Bending, points 24 to 48
18
Thermal Diffusivity, mm2/s 5.4
5.6
Thermal Shock Resistance, points 25 to 71
16

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.020
Chromium (Cr), % 3.5 to 4.3
19 to 21
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0.3 to 0.6
Iron (Fe), % 76.3 to 81
74.9 to 80.7
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
0 to 0.6
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.012
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0