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AISI 418 Stainless Steel vs. S45503 Stainless Steel

Both AISI 418 stainless steel and S45503 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is S45503 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
410 to 500
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
4.6 to 6.8
Fatigue Strength, MPa 520
710 to 800
Poisson's Ratio 0.28
0.28
Reduction in Area, % 50
17 to 28
Shear Modulus, GPa 77
75
Shear Strength, MPa 680
940 to 1070
Tensile Strength: Ultimate (UTS), MPa 1100
1610 to 1850
Tensile Strength: Yield (Proof), MPa 850
1430 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
640
Maximum Temperature: Mechanical, °C 770
760
Melting Completion (Liquidus), °C 1500
1440
Melting Onset (Solidus), °C 1460
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 15
15
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
3.4
Embodied Energy, MJ/kg 41
48
Embodied Water, L/kg 110
120

Common Calculations

PREN (Pitting Resistance) 19
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
82 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
57 to 65
Strength to Weight: Bending, points 29
39 to 43
Thermal Shock Resistance, points 40
56 to 64

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.010
Chromium (Cr), % 12 to 14
11 to 12.5
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 78.5 to 83.6
72.4 to 78.9
Manganese (Mn), % 0 to 0.5
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
0 to 0.5
Nickel (Ni), % 1.8 to 2.2
7.5 to 9.5
Niobium (Nb), % 0
0.1 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.0 to 1.4
Tungsten (W), % 2.5 to 3.5
0