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EN 1.4021 Stainless Steel vs. EN 1.6554 Steel

Both EN 1.4021 stainless steel and EN 1.6554 steel are iron alloys. They have 88% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is EN 1.6554 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 17
17 to 21
Fatigue Strength, MPa 240 to 380
380 to 520
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 630 to 880
780 to 930
Tensile Strength: Yield (Proof), MPa 390 to 670
550 to 790

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 760
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
3.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 1.9
1.7
Embodied Energy, MJ/kg 27
22
Embodied Water, L/kg 100
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
810 to 1650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23 to 31
27 to 33
Strength to Weight: Bending, points 21 to 26
24 to 27
Thermal Diffusivity, mm2/s 8.1
11
Thermal Shock Resistance, points 22 to 31
23 to 27

Alloy Composition

Carbon (C), % 0.16 to 0.25
0.23 to 0.28
Chromium (Cr), % 12 to 14
0.7 to 0.9
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 83.2 to 87.8
94.6 to 97.3
Manganese (Mn), % 0 to 1.5
0.6 to 0.9
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0
1.0 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.025
Vanadium (V), % 0
0 to 0.030