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EN 1.4021 Stainless Steel vs. EN 1.4568 Stainless Steel

Both EN 1.4021 stainless steel and EN 1.4568 stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4021 stainless steel and the bottom bar is EN 1.4568 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 17
2.3 to 21
Fatigue Strength, MPa 240 to 380
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 390 to 530
520 to 930
Tensile Strength: Ultimate (UTS), MPa 630 to 880
830 to 1620
Tensile Strength: Yield (Proof), MPa 390 to 670
330 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 760
890
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
16
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 1.9
2.8
Embodied Energy, MJ/kg 27
40
Embodied Water, L/kg 100
140

Common Calculations

PREN (Pitting Resistance) 13
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 110
36 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 1160
290 to 5710
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 31
30 to 58
Strength to Weight: Bending, points 21 to 26
25 to 40
Thermal Diffusivity, mm2/s 8.1
4.3
Thermal Shock Resistance, points 22 to 31
23 to 46

Alloy Composition

Aluminum (Al), % 0
0.7 to 1.5
Carbon (C), % 0.16 to 0.25
0 to 0.090
Chromium (Cr), % 12 to 14
16 to 18
Iron (Fe), % 83.2 to 87.8
70.9 to 76.8
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 0
6.5 to 7.8
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.015