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EN 1.4621 Stainless Steel vs. EN 1.6580 Steel

Both EN 1.4621 stainless steel and EN 1.6580 steel are iron alloys. They have 80% of their average alloy composition in common. There are 31 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 1.4621 stainless steel and the bottom bar is EN 1.6580 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25
11 to 19
Fatigue Strength, MPa 190
310 to 610
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 320
450 to 700
Tensile Strength: Ultimate (UTS), MPa 500
720 to 1170
Tensile Strength: Yield (Proof), MPa 270
460 to 990

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 970
450
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 21
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 14
4.3
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 41
23
Embodied Water, L/kg 140
59

Common Calculations

PREN (Pitting Resistance) 21
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 190
560 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
26 to 41
Strength to Weight: Bending, points 18
23 to 31
Thermal Diffusivity, mm2/s 5.7
11
Thermal Shock Resistance, points 17
21 to 34

Alloy Composition

Carbon (C), % 0 to 0.030
0.26 to 0.34
Chromium (Cr), % 20 to 21.5
1.8 to 2.2
Copper (Cu), % 0.1 to 1.0
0
Iron (Fe), % 74.4 to 79.7
93.7 to 95.5
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035