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EN 1.4318 Stainless Steel vs. EN 1.4378 Stainless Steel

Both EN 1.4318 stainless steel and EN 1.4378 stainless steel are iron alloys. They have 87% 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 1.4318 stainless steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190 to 340
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
14 to 34
Fatigue Strength, MPa 340
340 to 550
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 520
510 to 680
Tensile Strength: Ultimate (UTS), MPa 740
760 to 1130
Tensile Strength: Yield (Proof), MPa 380
430 to 970

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 1430
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 13
12
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.8
2.7
Embodied Energy, MJ/kg 39
39
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 20
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
150 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 360
470 to 2370
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
28 to 41
Strength to Weight: Bending, points 23
24 to 31
Thermal Shock Resistance, points 17
16 to 23

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 16.5 to 18.5
17 to 19
Iron (Fe), % 70.2 to 77.4
61.2 to 69
Manganese (Mn), % 0 to 2.0
11.5 to 14.5
Nickel (Ni), % 6.0 to 8.0
2.3 to 3.7
Nitrogen (N), % 0.1 to 0.2
0.2 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030