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EN 1.6511 Steel vs. S21640 Stainless Steel

Both EN 1.6511 steel and S21640 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.6511 steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 12
46
Fatigue Strength, MPa 480
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 600
520
Tensile Strength: Ultimate (UTS), MPa 990
740
Tensile Strength: Yield (Proof), MPa 770
350

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 430
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 36
15
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.1
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.6
Embodied Energy, MJ/kg 21
51
Embodied Water, L/kg 53
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
280
Resilience: Unit (Modulus of Resilience), kJ/m3 1590
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 35
27
Strength to Weight: Bending, points 28
23
Thermal Diffusivity, mm2/s 9.9
4.0
Thermal Shock Resistance, points 29
16

Alloy Composition

Carbon (C), % 0.32 to 0.4
0 to 0.080
Chromium (Cr), % 0.9 to 1.2
17.5 to 19.5
Iron (Fe), % 95.6 to 97.2
63 to 74.3
Manganese (Mn), % 0.5 to 0.8
3.5 to 6.5
Molybdenum (Mo), % 0.15 to 0.3
0.5 to 2.0
Nickel (Ni), % 0.9 to 1.2
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.060
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030