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S21800 Stainless Steel vs. EN 1.4125 Stainless Steel

Both S21800 stainless steel and EN 1.4125 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 80% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is EN 1.4125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
250
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
19
Fatigue Strength, MPa 330
300
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 510
500
Tensile Strength: Ultimate (UTS), MPa 740
800
Tensile Strength: Yield (Proof), MPa 390
470

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 900
870
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1310
1390
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 15
9.0
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 3.1
2.3
Embodied Energy, MJ/kg 45
32
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
130
Resilience: Unit (Modulus of Resilience), kJ/m3 390
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
29
Strength to Weight: Bending, points 24
25
Thermal Shock Resistance, points 17
29

Alloy Composition

Carbon (C), % 0 to 0.1
1.0 to 1.2
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 59.1 to 65.4
78 to 82.7
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Molybdenum (Mo), % 0
0.4 to 0.8
Nickel (Ni), % 8.0 to 9.0
0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 3.5 to 4.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015