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EN 1.4011 Stainless Steel vs. EN 1.6511 Steel

Both EN 1.4011 stainless steel and EN 1.6511 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4011 stainless steel and the bottom bar is EN 1.6511 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
12
Fatigue Strength, MPa 310
480
Impact Strength: V-Notched Charpy, J 23
37
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 700
990
Tensile Strength: Yield (Proof), MPa 510
770

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 750
430
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
36
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
3.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.6
Embodied Energy, MJ/kg 28
21
Embodied Water, L/kg 100
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 660
1590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25
35
Strength to Weight: Bending, points 23
28
Thermal Diffusivity, mm2/s 6.7
9.9
Thermal Shock Resistance, points 24
29

Alloy Composition

Carbon (C), % 0 to 0.15
0.32 to 0.4
Chromium (Cr), % 11.5 to 13.5
0.9 to 1.2
Iron (Fe), % 82.8 to 88.5
95.6 to 97.2
Manganese (Mn), % 0 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
0.15 to 0.3
Nickel (Ni), % 0 to 1.0
0.9 to 1.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035