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S21800 Stainless Steel vs. EN 1.7725 Steel

Both S21800 stainless steel and EN 1.7725 steel are iron alloys. They have 65% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 40
14
Fatigue Strength, MPa 330
390 to 550
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 740
830 to 1000
Tensile Strength: Yield (Proof), MPa 390
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 900
440
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1420
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.9
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.8
Embodied Energy, MJ/kg 45
24
Embodied Water, L/kg 150
54

Common Calculations

PREN (Pitting Resistance) 19
2.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 390
980 to 1940
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 27
29 to 35
Strength to Weight: Bending, points 24
25 to 28
Thermal Shock Resistance, points 17
24 to 29

Alloy Composition

Carbon (C), % 0 to 0.1
0.27 to 0.34
Chromium (Cr), % 16 to 18
1.3 to 1.7
Iron (Fe), % 59.1 to 65.4
95.7 to 97.5
Manganese (Mn), % 7.0 to 9.0
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 8.0 to 9.0
0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 3.5 to 4.5
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15