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AISI 418 Stainless Steel vs. SAE-AISI 1137 Steel

Both AISI 418 stainless steel and SAE-AISI 1137 steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is SAE-AISI 1137 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
11 to 17
Fatigue Strength, MPa 520
250 to 400
Poisson's Ratio 0.28
0.29
Reduction in Area, % 50
34 to 39
Shear Modulus, GPa 77
73
Shear Strength, MPa 680
430 to 460
Tensile Strength: Ultimate (UTS), MPa 1100
700 to 760
Tensile Strength: Yield (Proof), MPa 850
370 to 650

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
400
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
51
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
10
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
1.9
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.4
Embodied Energy, MJ/kg 41
19
Embodied Water, L/kg 110
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
81 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
360 to 1130
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
25 to 27
Strength to Weight: Bending, points 29
22 to 24
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 40
21 to 23

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.32 to 0.39
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 78.5 to 83.6
97.8 to 98.3
Manganese (Mn), % 0 to 0.5
1.4 to 1.7
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0.080 to 0.13
Tungsten (W), % 2.5 to 3.5
0