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EN 1.4558 Stainless Steel vs. EN 1.4578 Stainless Steel

Both EN 1.4558 stainless steel and EN 1.4578 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 72% 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 1.4558 stainless steel and the bottom bar is EN 1.4578 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
51
Fatigue Strength, MPa 170
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 350
400
Tensile Strength: Ultimate (UTS), MPa 510
550
Tensile Strength: Yield (Proof), MPa 200
200

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 480
410
Maximum Temperature: Mechanical, °C 1100
930
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1350
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 31
19
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 5.5
3.7
Embodied Energy, MJ/kg 77
51
Embodied Water, L/kg 200
160

Common Calculations

PREN (Pitting Resistance) 22
25
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
220
Resilience: Unit (Modulus of Resilience), kJ/m3 100
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 3.1
3.9
Thermal Shock Resistance, points 12
12

Alloy Composition

Aluminum (Al), % 0.15 to 0.45
0
Carbon (C), % 0 to 0.030
0 to 0.040
Chromium (Cr), % 20 to 23
16.5 to 17.5
Copper (Cu), % 0
3.0 to 3.5
Iron (Fe), % 39.2 to 47.9
62.3 to 68.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 2.5
Nickel (Ni), % 32 to 35
10 to 11
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.020
0 to 0.045
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0 to 0.6
0