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EN 1.4618 Stainless Steel vs. EN 1.4378 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4378 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 29 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 1.4618 stainless steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
14 to 34
Fatigue Strength, MPa 240 to 250
340 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480 to 500
510 to 680
Tensile Strength: Ultimate (UTS), MPa 680 to 700
760 to 1130
Tensile Strength: Yield (Proof), MPa 250 to 260
430 to 970

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
910
Melting Completion (Liquidus), °C 1400
1390
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 19
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
470 to 2370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 25
28 to 41
Strength to Weight: Bending, points 22 to 23
24 to 31
Thermal Shock Resistance, points 15 to 16
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
17 to 19
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
61.2 to 69
Manganese (Mn), % 5.5 to 9.5
11.5 to 14.5
Nickel (Ni), % 4.5 to 5.5
2.3 to 3.7
Nitrogen (N), % 0 to 0.15
0.2 to 0.4
Phosphorus (P), % 0 to 0.070
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030