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S20161 Stainless Steel vs. S31100 Stainless Steel

Both S20161 stainless steel and S31100 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 34 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 S20161 stainless steel and the bottom bar is S31100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
270
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 46
4.5
Fatigue Strength, MPa 360
330
Poisson's Ratio 0.28
0.27
Rockwell C Hardness 22
28
Shear Modulus, GPa 76
79
Shear Strength, MPa 690
580
Tensile Strength: Ultimate (UTS), MPa 980
1000
Tensile Strength: Yield (Proof), MPa 390
710

Thermal Properties

Latent Heat of Fusion, J/g 330
300
Maximum Temperature: Corrosion, °C 410
470
Maximum Temperature: Mechanical, °C 870
1100
Melting Completion (Liquidus), °C 1380
1420
Melting Onset (Solidus), °C 1330
1380
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
16
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 2.7
3.1
Embodied Energy, MJ/kg 39
44
Embodied Water, L/kg 130
170

Common Calculations

PREN (Pitting Resistance) 19
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 360
40
Resilience: Unit (Modulus of Resilience), kJ/m3 390
1240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 36
36
Strength to Weight: Bending, points 29
29
Thermal Diffusivity, mm2/s 4.0
4.2
Thermal Shock Resistance, points 22
28

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.060
Chromium (Cr), % 15 to 18
25 to 27
Iron (Fe), % 65.6 to 73.9
63.6 to 69
Manganese (Mn), % 4.0 to 6.0
0 to 1.0
Nickel (Ni), % 4.0 to 6.0
6.0 to 7.0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 3.0 to 4.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Titanium (Ti), % 0
0 to 0.25