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EN 1.3551 Steel vs. S31803 Stainless Steel

Both EN 1.3551 steel and S31803 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.3551 steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 75
80
Tensile Strength: Ultimate (UTS), MPa 720
710

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Maximum Temperature: Mechanical, °C 530
1060
Melting Completion (Liquidus), °C 1490
1450
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 36
16
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
17
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.9
3.6
Embodied Energy, MJ/kg 71
49
Embodied Water, L/kg 82
160

Common Calculations

PREN (Pitting Resistance) 18
34
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
25
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 9.8
4.3
Thermal Shock Resistance, points 21
20

Alloy Composition

Carbon (C), % 0.77 to 0.85
0 to 0.030
Chromium (Cr), % 3.9 to 4.3
21 to 23
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 88.8 to 91.1
63.7 to 71.9
Manganese (Mn), % 0.15 to 0.35
0 to 2.0
Molybdenum (Mo), % 4.0 to 4.5
2.5 to 3.5
Nickel (Ni), % 0
4.5 to 6.5
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 0 to 0.25
0
Vanadium (V), % 0.9 to 1.1
0