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EN 1.3558 Steel vs. S82121 Stainless Steel

Both EN 1.3558 steel and S82121 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.3558 steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
250
Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 770
730

Thermal Properties

Latent Heat of Fusion, J/g 240
290
Maximum Temperature: Mechanical, °C 490
1020
Melting Completion (Liquidus), °C 1810
1430
Melting Onset (Solidus), °C 1760
1380
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 12
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 45
14
Density, g/cm3 9.3
7.7
Embodied Carbon, kg CO2/kg material 8.4
2.8
Embodied Energy, MJ/kg 130
40
Embodied Water, L/kg 90
150

Common Calculations

PREN (Pitting Resistance) 35
28
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 5.3
4.0
Thermal Shock Resistance, points 22
20

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.035
Chromium (Cr), % 3.9 to 4.3
21 to 23
Copper (Cu), % 0 to 0.3
0.2 to 1.2
Iron (Fe), % 73.7 to 77.6
66.7 to 75.4
Manganese (Mn), % 0 to 0.4
1.0 to 2.5
Molybdenum (Mo), % 0 to 0.6
0.3 to 1.3
Nickel (Ni), % 0
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 1.0 to 1.3
0