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S44535 Stainless Steel vs. S31803 Stainless Steel

Both S44535 stainless steel and S31803 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S44535 stainless steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
29
Fatigue Strength, MPa 210
370
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
80
Shear Strength, MPa 290
460
Tensile Strength: Ultimate (UTS), MPa 450
710
Tensile Strength: Yield (Proof), MPa 290
500

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 1000
1060
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
17
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
3.6
Embodied Energy, MJ/kg 34
49
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 22
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 200
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16
25
Strength to Weight: Bending, points 17
23
Thermal Diffusivity, mm2/s 5.6
4.3
Thermal Shock Resistance, points 15
20

Alloy Composition

Aluminum (Al), % 0 to 0.5
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 20 to 24
21 to 23
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 73.2 to 79.6
63.7 to 71.9
Lanthanum (La), % 0.040 to 0.2
0
Manganese (Mn), % 0.3 to 0.8
0 to 2.0
Molybdenum (Mo), % 0
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 0.050
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.020
Titanium (Ti), % 0.030 to 0.2
0