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S31803 Stainless Steel vs. EN 1.4581 Stainless Steel

Both S31803 stainless steel and EN 1.4581 stainless steel are iron alloys. They have a moderately high 94% 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 1.4581 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 29
28
Fatigue Strength, MPa 370
150
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 710
510
Tensile Strength: Yield (Proof), MPa 500
210

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
490
Maximum Temperature: Mechanical, °C 1060
990
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
4.2
Embodied Energy, MJ/kg 49
59
Embodied Water, L/kg 160
160

Common Calculations

PREN (Pitting Resistance) 34
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120
Resilience: Unit (Modulus of Resilience), kJ/m3 630
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 4.3
3.9
Thermal Shock Resistance, points 20
12

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.070
Chromium (Cr), % 21 to 23
18 to 20
Iron (Fe), % 63.7 to 71.9
61.4 to 71
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.5
2.0 to 2.5
Nickel (Ni), % 4.5 to 6.5
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.020
0 to 0.030