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S82121 Stainless Steel vs. EN 1.7380 Steel

Both S82121 stainless steel and EN 1.7380 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 S82121 stainless steel and the bottom bar is EN 1.7380 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
160 to 170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
19 to 20
Fatigue Strength, MPa 370
200 to 230
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
74
Shear Strength, MPa 470
330 to 350
Tensile Strength: Ultimate (UTS), MPa 730
540 to 550
Tensile Strength: Yield (Proof), MPa 510
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Maximum Temperature: Mechanical, °C 1020
460
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 14
3.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 40
23
Embodied Water, L/kg 150
59

Common Calculations

PREN (Pitting Resistance) 28
5.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
87 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 660
230 to 280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
19 to 20
Strength to Weight: Bending, points 23
19
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 20
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.035
0.080 to 0.14
Chromium (Cr), % 21 to 23
2.0 to 2.5
Copper (Cu), % 0.2 to 1.2
0 to 0.3
Iron (Fe), % 66.7 to 75.4
94.6 to 96.6
Manganese (Mn), % 1.0 to 2.5
0.4 to 0.8
Molybdenum (Mo), % 0.3 to 1.3
0.9 to 1.1
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.15 to 0.25
0 to 0.012
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.010