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S21800 Stainless Steel vs. EN 1.4409 Stainless Steel

Both S21800 stainless steel and EN 1.4409 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is EN 1.4409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
140
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
34
Fatigue Strength, MPa 330
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 740
490
Tensile Strength: Yield (Proof), MPa 390
220

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 900
990
Melting Completion (Liquidus), °C 1360
1440
Melting Onset (Solidus), °C 1310
1390
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
19
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.7
Embodied Energy, MJ/kg 45
52
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 19
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
140
Resilience: Unit (Modulus of Resilience), kJ/m3 390
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
17
Strength to Weight: Bending, points 24
18
Thermal Shock Resistance, points 17
11

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.030
Chromium (Cr), % 16 to 18
18 to 20
Iron (Fe), % 59.1 to 65.4
61.7 to 71
Manganese (Mn), % 7.0 to 9.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 8.0 to 9.0
9.0 to 12
Nitrogen (N), % 0.080 to 0.18
0 to 0.2
Phosphorus (P), % 0 to 0.060
0 to 0.035
Silicon (Si), % 3.5 to 4.5
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.025