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EN 1.4558 Stainless Steel vs. EN 1.4568 Stainless Steel

Both EN 1.4558 stainless steel and EN 1.4568 stainless steel are iron alloys. They have 69% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4558 stainless steel and the bottom bar is EN 1.4568 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
2.3 to 21
Fatigue Strength, MPa 170
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 350
520 to 930
Tensile Strength: Ultimate (UTS), MPa 510
830 to 1620
Tensile Strength: Yield (Proof), MPa 200
330 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 480
410
Maximum Temperature: Mechanical, °C 1100
890
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 31
13
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.5
2.8
Embodied Energy, MJ/kg 77
40
Embodied Water, L/kg 200
140

Common Calculations

PREN (Pitting Resistance) 22
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
36 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 100
290 to 5710
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
30 to 58
Strength to Weight: Bending, points 18
25 to 40
Thermal Diffusivity, mm2/s 3.1
4.3
Thermal Shock Resistance, points 12
23 to 46

Alloy Composition

Aluminum (Al), % 0.15 to 0.45
0.7 to 1.5
Carbon (C), % 0 to 0.030
0 to 0.090
Chromium (Cr), % 20 to 23
16 to 18
Iron (Fe), % 39.2 to 47.9
70.9 to 76.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 32 to 35
6.5 to 7.8
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 0.7
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0 to 0.6
0