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EN 1.4378 Stainless Steel vs. EN 1.4938 Stainless Steel

Both EN 1.4378 stainless steel and EN 1.4938 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 28 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 1.4378 stainless steel and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 34
16 to 17
Fatigue Strength, MPa 340 to 550
390 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 510 to 680
540 to 630
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
870 to 1030
Tensile Strength: Yield (Proof), MPa 430 to 970
640 to 870

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 910
750
Melting Completion (Liquidus), °C 1390
1460
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.7
3.3
Embodied Energy, MJ/kg 39
47
Embodied Water, L/kg 150
110

Common Calculations

PREN (Pitting Resistance) 23
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
140 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
1050 to 1920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 41
31 to 37
Strength to Weight: Bending, points 24 to 31
26 to 29
Thermal Shock Resistance, points 16 to 23
30 to 35

Alloy Composition

Carbon (C), % 0 to 0.080
0.080 to 0.15
Chromium (Cr), % 17 to 19
11 to 12.5
Iron (Fe), % 61.2 to 69
80.5 to 84.8
Manganese (Mn), % 11.5 to 14.5
0.4 to 0.9
Molybdenum (Mo), % 0
1.5 to 2.0
Nickel (Ni), % 2.3 to 3.7
2.0 to 3.0
Nitrogen (N), % 0.2 to 0.4
0.020 to 0.040
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0
0.25 to 0.4