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S17400 Stainless Steel vs. S31803 Stainless Steel

Both S17400 stainless steel and S31803 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 35 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is S31803 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 21
29
Fatigue Strength, MPa 380 to 670
370
Poisson's Ratio 0.28
0.27
Reduction in Area, % 40 to 62
50
Rockwell C Hardness 27 to 43
27
Shear Modulus, GPa 75
80
Shear Strength, MPa 570 to 830
460
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
710
Tensile Strength: Yield (Proof), MPa 580 to 1250
500

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 450
430
Maximum Temperature: Mechanical, °C 850
1060
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 14
17
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
3.6
Embodied Energy, MJ/kg 39
49
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 16
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
180
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
630
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
25
Strength to Weight: Bending, points 27 to 35
23
Thermal Diffusivity, mm2/s 4.5
4.3
Thermal Shock Resistance, points 30 to 46
20

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 15 to 17
21 to 23
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
63.7 to 71.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 3.0 to 5.0
4.5 to 6.5
Niobium (Nb), % 0.15 to 0.45
0
Nitrogen (N), % 0
0.080 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020