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EN 1.4558 Stainless Steel vs. EN 1.4588 Stainless Steel

Both EN 1.4558 stainless steel and EN 1.4588 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 89% of their average alloy composition in common. There are 31 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 1.4558 stainless steel and the bottom bar is EN 1.4588 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
34
Fatigue Strength, MPa 170
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 510
540
Tensile Strength: Yield (Proof), MPa 200
240

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 480
420
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 31
33
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.5
6.2
Embodied Energy, MJ/kg 77
84
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 22
44
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
150
Resilience: Unit (Modulus of Resilience), kJ/m3 100
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
18
Strength to Weight: Bending, points 18
18
Thermal Diffusivity, mm2/s 3.1
4.0
Thermal Shock Resistance, points 12
11

Alloy Composition

Aluminum (Al), % 0.15 to 0.45
0
Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 20 to 23
19 to 21
Copper (Cu), % 0
0.5 to 1.5
Iron (Fe), % 39.2 to 47.9
41.2 to 50.4
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 32 to 35
24 to 26
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Titanium (Ti), % 0 to 0.6
0