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EN 1.4938 Stainless Steel vs. S20431 Stainless Steel

Both EN 1.4938 stainless steel and S20431 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
46
Fatigue Strength, MPa 390 to 520
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 540 to 630
500
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
710
Tensile Strength: Yield (Proof), MPa 640 to 870
350

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 750
890
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.3
2.5
Embodied Energy, MJ/kg 47
36
Embodied Water, L/kg 110
140

Common Calculations

PREN (Pitting Resistance) 18
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
270
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
25
Strength to Weight: Bending, points 26 to 29
23
Thermal Diffusivity, mm2/s 8.1
4.0
Thermal Shock Resistance, points 30 to 35
15

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.12
Chromium (Cr), % 11 to 12.5
17 to 18
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 80.5 to 84.8
66.1 to 74.4
Manganese (Mn), % 0.4 to 0.9
5.0 to 7.0
Molybdenum (Mo), % 1.5 to 2.0
0
Nickel (Ni), % 2.0 to 3.0
2.0 to 4.0
Nitrogen (N), % 0.020 to 0.040
0.1 to 0.25
Phosphorus (P), % 0 to 0.025
0 to 0.045
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