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EN 1.4031 Stainless Steel vs. EN 1.4568 Stainless Steel

Both EN 1.4031 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 1.4031 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 13
2.3 to 21
Fatigue Strength, MPa 220 to 400
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 400 to 540
520 to 930
Tensile Strength: Ultimate (UTS), MPa 670 to 900
830 to 1620
Tensile Strength: Yield (Proof), MPa 390 to 730
330 to 1490

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 770
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 3.1
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
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) 14
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 94
36 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1360
290 to 5710
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 32
30 to 58
Strength to Weight: Bending, points 22 to 27
25 to 40
Thermal Diffusivity, mm2/s 8.1
4.3
Thermal Shock Resistance, points 23 to 32
23 to 46

Alloy Composition

Aluminum (Al), % 0
0.7 to 1.5
Carbon (C), % 0.36 to 0.42
0 to 0.090
Chromium (Cr), % 12.5 to 14.5
16 to 18
Iron (Fe), % 83 to 87.1
70.9 to 76.8
Manganese (Mn), % 0 to 1.0
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