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EN 1.4409 Stainless Steel vs. EN 1.4378 Stainless Steel

Both EN 1.4409 stainless steel and EN 1.4378 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 28 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 EN 1.4409 stainless steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
14 to 34
Fatigue Strength, MPa 180
340 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 490
760 to 1130
Tensile Strength: Yield (Proof), MPa 220
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 990
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 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 19
12
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.7
2.7
Embodied Energy, MJ/kg 52
39
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 28
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 120
470 to 2370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
28 to 41
Strength to Weight: Bending, points 18
24 to 31
Thermal Shock Resistance, points 11
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 18 to 20
17 to 19
Iron (Fe), % 61.7 to 71
61.2 to 69
Manganese (Mn), % 0 to 2.0
11.5 to 14.5
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 9.0 to 12
2.3 to 3.7
Nitrogen (N), % 0 to 0.2
0.2 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.060
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030