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EN 1.8505 Steel vs. S21640 Stainless Steel

Both EN 1.8505 steel and S21640 stainless steel are iron alloys. They have 71% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.8505 steel and the bottom bar is S21640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
230
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13
46
Fatigue Strength, MPa 540
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 630
520
Tensile Strength: Ultimate (UTS), MPa 1050
740
Tensile Strength: Yield (Proof), MPa 860
350

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 440
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 39
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 8.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
17
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.6
Embodied Energy, MJ/kg 22
51
Embodied Water, L/kg 65
150

Common Calculations

PREN (Pitting Resistance) 2.6
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
280
Resilience: Unit (Modulus of Resilience), kJ/m3 1950
300
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 37
27
Strength to Weight: Bending, points 30
23
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 31
16

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.28 to 0.35
0 to 0.080
Chromium (Cr), % 1.5 to 1.8
17.5 to 19.5
Iron (Fe), % 95.4 to 97.1
63 to 74.3
Manganese (Mn), % 0.4 to 0.7
3.5 to 6.5
Molybdenum (Mo), % 0.2 to 0.4
0.5 to 2.0
Nickel (Ni), % 0
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 0.025
0 to 0.060
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030