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EN 1.4439 Stainless Steel vs. S20431 Stainless Steel

Both EN 1.4439 stainless steel and S20431 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 33 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 1.4439 stainless steel and the bottom bar is S20431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
46
Fatigue Strength, MPa 270
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 470
500
Tensile Strength: Ultimate (UTS), MPa 680
710
Tensile Strength: Yield (Proof), MPa 310
350

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 980
890
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 22
12
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.5
2.5
Embodied Energy, MJ/kg 61
36
Embodied Water, L/kg 160
140

Common Calculations

PREN (Pitting Resistance) 35
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
270
Resilience: Unit (Modulus of Resilience), kJ/m3 240
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
25
Strength to Weight: Bending, points 22
23
Thermal Diffusivity, mm2/s 3.8
4.0
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.12
Chromium (Cr), % 16.5 to 18.5
17 to 18
Copper (Cu), % 0
1.5 to 3.5
Iron (Fe), % 58.7 to 66.9
66.1 to 74.4
Manganese (Mn), % 0 to 2.0
5.0 to 7.0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 12.5 to 14.5
2.0 to 4.0
Nitrogen (N), % 0.12 to 0.22
0.1 to 0.25
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030