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AISI 439 Stainless Steel vs. SAE-AISI M44 Steel

Both AISI 439 stainless steel and SAE-AISI M44 steel are iron alloys. They have 73% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is SAE-AISI M44 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 490
870 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1510
1590
Melting Onset (Solidus), °C 1430
1540
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
43
Density, g/cm3 7.7
8.4
Embodied Carbon, kg CO2/kg material 2.3
9.9
Embodied Energy, MJ/kg 34
150
Embodied Water, L/kg 120
170

Common Calculations

PREN (Pitting Resistance) 18
35
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 18
28 to 75
Strength to Weight: Bending, points 18
24 to 46
Thermal Diffusivity, mm2/s 6.7
3.7
Thermal Shock Resistance, points 16
27 to 70

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
1.1 to 1.2
Chromium (Cr), % 17 to 19
4.0 to 4.8
Cobalt (Co), % 0
11 to 12.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 77.1 to 82.8
65.3 to 70.6
Manganese (Mn), % 0 to 1.0
0.2 to 0.4
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.5
0 to 0.3
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.3 to 0.55
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 1.1
0
Tungsten (W), % 0
5.0 to 5.8
Vanadium (V), % 0
1.9 to 2.2