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AISI 304 Stainless Steel vs. SAE-AISI 5140 Steel

Both AISI 304 stainless steel and SAE-AISI 5140 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 360
170 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 8.0 to 43
12 to 29
Fatigue Strength, MPa 210 to 440
220 to 570
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 400 to 690
360 to 600
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
560 to 970
Tensile Strength: Yield (Proof), MPa 230 to 860
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 710
420
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
45
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
19
Embodied Water, L/kg 150
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1870
220 to 1880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 42
20 to 34
Strength to Weight: Bending, points 20 to 32
19 to 28
Thermal Diffusivity, mm2/s 4.2
12
Thermal Shock Resistance, points 12 to 25
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.080
0.38 to 0.43
Chromium (Cr), % 18 to 20
0.7 to 0.9
Iron (Fe), % 66.5 to 74
97.3 to 98.1
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Nickel (Ni), % 8.0 to 10.5
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040

Comparable Variants