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EN 1.4378 Stainless Steel vs. EN 1.4446 Stainless Steel

Both EN 1.4378 stainless steel and EN 1.4446 stainless steel are iron alloys. They have 85% 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 1.4378 stainless steel and the bottom bar is EN 1.4446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
140
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 34
23
Fatigue Strength, MPa 340 to 550
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
490
Tensile Strength: Yield (Proof), MPa 430 to 970
240

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 910
980
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 7.6
7.9
Embodied Carbon, kg CO2/kg material 2.7
4.5
Embodied Energy, MJ/kg 39
60
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 23
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
93
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 41
17
Strength to Weight: Bending, points 24 to 31
17
Thermal Shock Resistance, points 16 to 23
11

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17 to 19
16.5 to 18.5
Iron (Fe), % 61.2 to 69
59.7 to 66.9
Manganese (Mn), % 11.5 to 14.5
0 to 1.5
Molybdenum (Mo), % 0
4.0 to 4.5
Nickel (Ni), % 2.3 to 3.7
12.5 to 14.5
Nitrogen (N), % 0.2 to 0.4
0.12 to 0.22
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030