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EN 1.4646 Stainless Steel vs. S21904 Stainless Steel

Both EN 1.4646 stainless steel and S21904 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4646 stainless steel and the bottom bar is S21904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
17 to 51
Fatigue Strength, MPa 340
380 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Shear Strength, MPa 500
510 to 620
Tensile Strength: Ultimate (UTS), MPa 750
700 to 1000
Tensile Strength: Yield (Proof), MPa 430
390 to 910

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
430
Maximum Temperature: Mechanical, °C 910
980
Melting Completion (Liquidus), °C 1390
1400
Melting Onset (Solidus), °C 1340
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.8
3.0
Embodied Energy, MJ/kg 41
43
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 23
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
160 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 460
380 to 2070
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
25 to 36
Strength to Weight: Bending, points 24
23 to 29
Thermal Shock Resistance, points 16
15 to 21

Alloy Composition

Carbon (C), % 0.020 to 0.1
0 to 0.040
Chromium (Cr), % 17 to 19
19 to 21.5
Copper (Cu), % 1.5 to 3.0
0
Iron (Fe), % 59 to 67.3
59.5 to 67.4
Manganese (Mn), % 10.5 to 12.5
8.0 to 10
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 3.5 to 4.5
5.5 to 7.5
Nitrogen (N), % 0.2 to 0.3
0.15 to 0.4
Phosphorus (P), % 0 to 0.050
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030