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AISI 418 Stainless Steel vs. ASTM A372 Grade E Steel

Both AISI 418 stainless steel and ASTM A372 grade E steel are iron alloys. They have 83% 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 418 stainless steel and the bottom bar is ASTM A372 grade E steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
20 to 22
Fatigue Strength, MPa 520
310 to 380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 680
410 to 570
Tensile Strength: Ultimate (UTS), MPa 1100
650 to 910
Tensile Strength: Yield (Proof), MPa 850
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
420
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
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.4
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.5
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 110
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
500 to 810
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
23 to 32
Strength to Weight: Bending, points 29
21 to 27
Thermal Diffusivity, mm2/s 6.7
12
Thermal Shock Resistance, points 40
19 to 27

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.25 to 0.35
Chromium (Cr), % 12 to 14
0.8 to 1.2
Iron (Fe), % 78.5 to 83.6
97 to 98.3
Manganese (Mn), % 0 to 0.5
0.4 to 0.9
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.25
Nickel (Ni), % 1.8 to 2.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 2.5 to 3.5
0