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S32654 Stainless Steel vs. AISI 418 Stainless Steel

Both S32654 stainless steel and AISI 418 stainless steel are iron alloys. They have 58% of their average alloy composition in common.

For each property being compared, the top bar is S32654 stainless steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
330
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
17
Fatigue Strength, MPa 450
520
Poisson's Ratio 0.28
0.28
Reduction in Area, % 46
50
Shear Modulus, GPa 82
77
Shear Strength, MPa 590
680
Tensile Strength: Ultimate (UTS), MPa 850
1100
Tensile Strength: Yield (Proof), MPa 490
850

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 1100
770
Melting Completion (Liquidus), °C 1450
1500
Melting Onset (Solidus), °C 1410
1460
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 11
25
Thermal Expansion, µm/m-K 15
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 34
15
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 6.4
2.9
Embodied Energy, MJ/kg 87
41
Embodied Water, L/kg 220
110

Common Calculations

PREN (Pitting Resistance) 57
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 330
170
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
38
Strength to Weight: Bending, points 25
29
Thermal Diffusivity, mm2/s 2.9
6.7
Thermal Shock Resistance, points 19
40

Alloy Composition

Carbon (C), % 0 to 0.020
0.15 to 0.2
Chromium (Cr), % 24 to 25
12 to 14
Copper (Cu), % 0.3 to 0.6
0
Iron (Fe), % 38.3 to 45.3
78.5 to 83.6
Manganese (Mn), % 2.0 to 4.0
0 to 0.5
Molybdenum (Mo), % 7.0 to 8.0
0 to 0.5
Nickel (Ni), % 21 to 23
1.8 to 2.2
Nitrogen (N), % 0.45 to 0.55
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.0050
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5