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EN 1.4378 Stainless Steel vs. EN 1.4646 Stainless Steel

Both EN 1.4378 stainless steel and EN 1.4646 stainless steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (1, 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 1.4646 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
220
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 34
34
Fatigue Strength, MPa 340 to 550
340
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 510 to 680
500
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
750
Tensile Strength: Yield (Proof), MPa 430 to 970
430

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 39
41
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 23
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
220
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 41
27
Strength to Weight: Bending, points 24 to 31
24
Thermal Shock Resistance, points 16 to 23
16

Alloy Composition

Carbon (C), % 0 to 0.080
0.020 to 0.1
Chromium (Cr), % 17 to 19
17 to 19
Copper (Cu), % 0
1.5 to 3.0
Iron (Fe), % 61.2 to 69
59 to 67.3
Manganese (Mn), % 11.5 to 14.5
10.5 to 12.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 2.3 to 3.7
3.5 to 4.5
Nitrogen (N), % 0.2 to 0.4
0.2 to 0.3
Phosphorus (P), % 0 to 0.060
0 to 0.050
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015