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EN 1.4378 Stainless Steel vs. S31730 Stainless Steel

Both EN 1.4378 stainless steel and S31730 stainless steel are iron alloys. They have 79% 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 S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 340
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 34
40
Fatigue Strength, MPa 340 to 550
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 510 to 680
370
Tensile Strength: Ultimate (UTS), MPa 760 to 1130
540
Tensile Strength: Yield (Proof), MPa 430 to 970
200

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 910
990
Melting Completion (Liquidus), °C 1390
1430
Melting Onset (Solidus), °C 1350
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 7.6
8.0
Embodied Carbon, kg CO2/kg material 2.7
4.6
Embodied Energy, MJ/kg 39
63
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 23
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 220
170
Resilience: Unit (Modulus of Resilience), kJ/m3 470 to 2370
99
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 41
19
Strength to Weight: Bending, points 24 to 31
18
Thermal Shock Resistance, points 16 to 23
12

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 17 to 19
17 to 19
Copper (Cu), % 0
4.0 to 5.0
Iron (Fe), % 61.2 to 69
52.4 to 61
Manganese (Mn), % 11.5 to 14.5
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 2.3 to 3.7
15 to 16.5
Nitrogen (N), % 0.2 to 0.4
0 to 0.045
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010