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EN 1.4938 Stainless Steel vs. S31727 Stainless Steel

Both EN 1.4938 stainless steel and S31727 stainless steel are iron alloys. They have 74% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
40
Fatigue Strength, MPa 390 to 520
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Shear Strength, MPa 540 to 630
430
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
630
Tensile Strength: Yield (Proof), MPa 640 to 870
270

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
1010
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.3
4.7
Embodied Energy, MJ/kg 47
64
Embodied Water, L/kg 110
180

Common Calculations

PREN (Pitting Resistance) 18
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
22
Strength to Weight: Bending, points 26 to 29
20
Thermal Shock Resistance, points 30 to 35
14

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.030
Chromium (Cr), % 11 to 12.5
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 80.5 to 84.8
53.7 to 61.3
Manganese (Mn), % 0.4 to 0.9
0 to 1.0
Molybdenum (Mo), % 1.5 to 2.0
3.8 to 4.5
Nickel (Ni), % 2.0 to 3.0
14.5 to 16.5
Nitrogen (N), % 0.020 to 0.040
0.15 to 0.21
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0