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SAE-AISI 1095 Steel vs. S44401 Stainless Steel

Both SAE-AISI 1095 steel and S44401 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1095 steel and the bottom bar is S44401 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10 to 11
21
Fatigue Strength, MPa 310 to 370
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
78
Shear Strength, MPa 400 to 540
300
Tensile Strength: Ultimate (UTS), MPa 680 to 900
480
Tensile Strength: Yield (Proof), MPa 500 to 590
300

Thermal Properties

Latent Heat of Fusion, J/g 240
280
Maximum Temperature: Mechanical, °C 400
930
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 47
22
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
12
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.9
Embodied Energy, MJ/kg 19
40
Embodied Water, L/kg 45
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 63 to 84
90
Resilience: Unit (Modulus of Resilience), kJ/m3 660 to 930
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 32
17
Strength to Weight: Bending, points 22 to 26
18
Thermal Diffusivity, mm2/s 13
5.9
Thermal Shock Resistance, points 22 to 29
17

Alloy Composition

Carbon (C), % 0.9 to 1.0
0 to 0.025
Chromium (Cr), % 0
17.5 to 19.5
Iron (Fe), % 98.4 to 98.8
75.1 to 80.6
Manganese (Mn), % 0.3 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
1.8 to 2.5
Nickel (Ni), % 0
0 to 1.0
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.040
0 to 0.040
Sulfur (S), % 0 to 0.050
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8