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EN 1.4418 Stainless Steel vs. S20431 Stainless Steel

Both EN 1.4418 stainless steel and S20431 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4418 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 20
46
Fatigue Strength, MPa 350 to 480
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 530 to 620
500
Tensile Strength: Ultimate (UTS), MPa 860 to 1000
710
Tensile Strength: Yield (Proof), MPa 540 to 790
350

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 870
890
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
2.5
Embodied Energy, MJ/kg 39
36
Embodied Water, L/kg 130
140

Common Calculations

PREN (Pitting Resistance) 20
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
270
Resilience: Unit (Modulus of Resilience), kJ/m3 730 to 1590
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 36
25
Strength to Weight: Bending, points 26 to 28
23
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 31 to 36
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.12
Chromium (Cr), % 15 to 17
17 to 18
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 73.2 to 80.2
66.1 to 74.4
Manganese (Mn), % 0 to 1.5
5.0 to 7.0
Molybdenum (Mo), % 0.8 to 1.5
0
Nickel (Ni), % 4.0 to 6.0
2.0 to 4.0
Nitrogen (N), % 0 to 0.020
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030