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S31803 Stainless Steel vs. EN 1.8509 Steel

Both S31803 stainless steel and EN 1.8509 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 (4, in this case) are not shown.

For each property being compared, the top bar is S31803 stainless steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
340
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 29
11
Fatigue Strength, MPa 370
580
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 460
680
Tensile Strength: Ultimate (UTS), MPa 710
1130
Tensile Strength: Yield (Proof), MPa 500
940

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1060
440
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 17
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.6
Embodied Energy, MJ/kg 49
22
Embodied Water, L/kg 160
65

Common Calculations

PREN (Pitting Resistance) 34
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 630
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
40
Strength to Weight: Bending, points 23
31
Thermal Diffusivity, mm2/s 4.3
10
Thermal Shock Resistance, points 20
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.030
0.38 to 0.45
Chromium (Cr), % 21 to 23
1.5 to 1.8
Iron (Fe), % 63.7 to 71.9
95.5 to 97.1
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 2.5 to 3.5
0.2 to 0.35
Nickel (Ni), % 4.5 to 6.5
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.020
0 to 0.035