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AISI 418 Stainless Steel vs. S45000 Stainless Steel

Both AISI 418 stainless steel and S45000 stainless steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
6.8 to 14
Fatigue Strength, MPa 520
330 to 650
Poisson's Ratio 0.28
0.28
Reduction in Area, % 50
22 to 50
Shear Modulus, GPa 77
76
Shear Strength, MPa 680
590 to 830
Tensile Strength: Ultimate (UTS), MPa 1100
980 to 1410
Tensile Strength: Yield (Proof), MPa 850
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
400
Maximum Temperature: Mechanical, °C 770
840
Melting Completion (Liquidus), °C 1500
1440
Melting Onset (Solidus), °C 1460
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 25
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
13
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 110
130

Common Calculations

PREN (Pitting Resistance) 19
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
850 to 4400
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 38
35 to 50
Strength to Weight: Bending, points 29
28 to 36
Thermal Diffusivity, mm2/s 6.7
4.5
Thermal Shock Resistance, points 40
33 to 47

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.050
Chromium (Cr), % 12 to 14
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Iron (Fe), % 78.5 to 83.6
72.1 to 79.3
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.5 to 1.0
Nickel (Ni), % 1.8 to 2.2
5.0 to 7.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 2.5 to 3.5
0