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S21904 Stainless Steel vs. EN 1.6579 Steel

Both S21904 stainless steel and EN 1.6579 steel are iron alloys. They have 68% of their average alloy composition in common. There are 31 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 S21904 stainless steel and the bottom bar is EN 1.6579 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
260 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
11 to 14
Fatigue Strength, MPa 380 to 550
380 to 570
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
850 to 980
Tensile Strength: Yield (Proof), MPa 390 to 910
600 to 910

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
440
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
39
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 15
3.7
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.7
Embodied Energy, MJ/kg 43
22
Embodied Water, L/kg 160
56

Common Calculations

PREN (Pitting Resistance) 25
2.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
950 to 2210
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 36
30 to 35
Strength to Weight: Bending, points 23 to 29
25 to 28
Thermal Diffusivity, mm2/s 3.8
11
Thermal Shock Resistance, points 15 to 21
25 to 29

Alloy Composition

Carbon (C), % 0 to 0.040
0.32 to 0.38
Chromium (Cr), % 19 to 21.5
1.4 to 1.7
Iron (Fe), % 59.5 to 67.4
94.2 to 96.1
Manganese (Mn), % 8.0 to 10
0.6 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.35
Nickel (Ni), % 5.5 to 7.5
1.4 to 1.7
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030

Comparable Variants