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EN 1.4958 Stainless Steel vs. S20431 Stainless Steel

Both EN 1.4958 stainless steel and S20431 stainless steel are iron alloys. They have 68% 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 1.4958 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, % 40
46
Fatigue Strength, MPa 170
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 430
500
Tensile Strength: Ultimate (UTS), MPa 630
710
Tensile Strength: Yield (Proof), MPa 190
350

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 500
410
Maximum Temperature: Mechanical, °C 1090
890
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1350
1360
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 30
12
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.3
2.5
Embodied Energy, MJ/kg 75
36
Embodied Water, L/kg 200
140

Common Calculations

PREN (Pitting Resistance) 21
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
270
Resilience: Unit (Modulus of Resilience), kJ/m3 95
310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
25
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 15
15

Alloy Composition

Aluminum (Al), % 0.2 to 0.5
0
Carbon (C), % 0.030 to 0.080
0 to 0.12
Chromium (Cr), % 19 to 22
17 to 18
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
1.5 to 3.5
Iron (Fe), % 41.1 to 50.6
66.1 to 74.4
Manganese (Mn), % 0 to 1.5
5.0 to 7.0
Nickel (Ni), % 30 to 32.5
2.0 to 4.0
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0 to 0.030
0.1 to 0.25
Phosphorus (P), % 0 to 0.015
0 to 0.045
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.2 to 0.5
0