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EN 1.6580 Steel vs. S21900 Stainless Steel

Both EN 1.6580 steel and S21900 stainless steel are iron alloys. They have 68% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.6580 steel and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 350
220
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 19
50
Fatigue Strength, MPa 310 to 610
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 450 to 700
510
Tensile Strength: Ultimate (UTS), MPa 720 to 1170
710
Tensile Strength: Yield (Proof), MPa 460 to 990
390

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 450
980
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
14
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
15
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
3.0
Embodied Energy, MJ/kg 23
43
Embodied Water, L/kg 59
160

Common Calculations

PREN (Pitting Resistance) 3.3
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
300
Resilience: Unit (Modulus of Resilience), kJ/m3 560 to 2590
380
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26 to 41
26
Strength to Weight: Bending, points 23 to 31
23
Thermal Diffusivity, mm2/s 11
3.8
Thermal Shock Resistance, points 21 to 34
15

Alloy Composition

Carbon (C), % 0.26 to 0.34
0 to 0.080
Chromium (Cr), % 1.8 to 2.2
19 to 21.5
Iron (Fe), % 93.7 to 95.5
59.4 to 67.4
Manganese (Mn), % 0.3 to 0.6
8.0 to 10
Molybdenum (Mo), % 0.3 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030