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EN 1.3956 Stainless Steel vs. S21900 Stainless Steel

Both EN 1.3956 stainless steel and S21900 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3956 stainless steel and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 27
50
Fatigue Strength, MPa 240
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 650
710
Tensile Strength: Yield (Proof), MPa 330
390

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 1080
980
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 22
15
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.8
3.0
Embodied Energy, MJ/kg 68
43
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 34
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
300
Resilience: Unit (Modulus of Resilience), kJ/m3 270
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
26
Strength to Weight: Bending, points 21
23
Thermal Shock Resistance, points 18
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.080
Chromium (Cr), % 20.5 to 23.5
19 to 21.5
Iron (Fe), % 51.9 to 62.1
59.4 to 67.4
Manganese (Mn), % 4.0 to 6.0
8.0 to 10
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
5.5 to 7.5
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0.15 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0