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AISI 309H Stainless Steel vs. SAE-AISI 5140 Steel

Both AISI 309H stainless steel and SAE-AISI 5140 steel are iron alloys. They have 64% of their average alloy composition in common. There are 31 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 AISI 309H stainless steel and the bottom bar is SAE-AISI 5140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
170 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 40
12 to 29
Fatigue Strength, MPa 200
220 to 570
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 400
360 to 600
Tensile Strength: Ultimate (UTS), MPa 580
560 to 970
Tensile Strength: Yield (Proof), MPa 230
290 to 840

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1080
420
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
19
Embodied Water, L/kg 170
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
76 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 130
220 to 1880
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21
20 to 34
Strength to Weight: Bending, points 20
19 to 28
Thermal Diffusivity, mm2/s 4.0
12
Thermal Shock Resistance, points 13
16 to 29

Alloy Composition

Carbon (C), % 0.040 to 0.1
0.38 to 0.43
Chromium (Cr), % 22 to 24
0.7 to 0.9
Iron (Fe), % 58.1 to 66
97.3 to 98.1
Manganese (Mn), % 0 to 2.0
0.7 to 0.9
Nickel (Ni), % 12 to 15
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