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EN 1.8888 Steel vs. S82121 Stainless Steel

Both EN 1.8888 steel and S82121 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 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 EN 1.8888 steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 16
28
Fatigue Strength, MPa 470
370
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
78
Shear Strength, MPa 510
470
Tensile Strength: Ultimate (UTS), MPa 830
730
Tensile Strength: Yield (Proof), MPa 720
510

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 420
1020
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
15
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
14
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.8
Embodied Energy, MJ/kg 26
40
Embodied Water, L/kg 54
150

Common Calculations

PREN (Pitting Resistance) 2.0
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1370
660
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
26
Strength to Weight: Bending, points 25
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 24
20

Alloy Composition

Boron (B), % 0 to 0.0050
0
Carbon (C), % 0 to 0.2
0 to 0.035
Chromium (Cr), % 0 to 1.5
21 to 23
Copper (Cu), % 0 to 0.3
0.2 to 1.2
Iron (Fe), % 91.9 to 100
66.7 to 75.4
Manganese (Mn), % 0 to 1.7
1.0 to 2.5
Molybdenum (Mo), % 0 to 0.7
0.3 to 1.3
Nickel (Ni), % 0 to 2.5
2.0 to 4.0
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.015
0.15 to 0.25
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.0050
0 to 0.010
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.12
0
Zirconium (Zr), % 0 to 0.15
0