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EN 1.4640 Stainless Steel vs. EN 1.4378 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4378 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
14 to 34
Fatigue Strength, MPa 230 to 250
340 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 440 to 460
510 to 680
Tensile Strength: Ultimate (UTS), MPa 620 to 650
760 to 1130
Tensile Strength: Yield (Proof), MPa 240 to 260
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 930
910
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 40
39
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 20
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
470 to 2370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
28 to 41
Strength to Weight: Bending, points 21
24 to 31
Thermal Shock Resistance, points 14 to 15
16 to 23

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.080
Chromium (Cr), % 18 to 19
17 to 19
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
61.2 to 69
Manganese (Mn), % 1.5 to 4.0
11.5 to 14.5
Nickel (Ni), % 5.5 to 6.9
2.3 to 3.7
Nitrogen (N), % 0.030 to 0.11
0.2 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030