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EN 1.4621 Stainless Steel vs. EN 1.4378 Stainless Steel

Both EN 1.4621 stainless steel and EN 1.4378 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 28 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 1.4621 stainless steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
14 to 34
Fatigue Strength, MPa 190
340 to 550
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 320
510 to 680
Tensile Strength: Ultimate (UTS), MPa 500
760 to 1130
Tensile Strength: Yield (Proof), MPa 270
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 510
410
Maximum Temperature: Mechanical, °C 970
910
Melting Completion (Liquidus), °C 1440
1390
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 11
17

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 21
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 190
470 to 2370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
28 to 41
Strength to Weight: Bending, points 18
24 to 31
Thermal Shock Resistance, points 17
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 20 to 21.5
17 to 19
Copper (Cu), % 0.1 to 1.0
0
Iron (Fe), % 74.4 to 79.7
61.2 to 69
Manganese (Mn), % 0 to 1.0
11.5 to 14.5
Nickel (Ni), % 0
2.3 to 3.7
Niobium (Nb), % 0.2 to 1.0
0
Nitrogen (N), % 0 to 0.030
0.2 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030