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S21900 Stainless Steel vs. S35115 Stainless Steel

Both S21900 stainless steel and S35115 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 80% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S21900 stainless steel and the bottom bar is S35115 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
46
Fatigue Strength, MPa 380
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
79
Shear Strength, MPa 510
470
Tensile Strength: Ultimate (UTS), MPa 710
670
Tensile Strength: Yield (Proof), MPa 390
310

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1350
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
26
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
4.8
Embodied Energy, MJ/kg 43
67
Embodied Water, L/kg 160
190

Common Calculations

PREN (Pitting Resistance) 25
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
250
Resilience: Unit (Modulus of Resilience), kJ/m3 380
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
24
Strength to Weight: Bending, points 23
22
Thermal Diffusivity, mm2/s 3.8
3.9
Thermal Shock Resistance, points 15
15

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 19 to 21.5
23 to 25
Iron (Fe), % 59.4 to 67.4
47.6 to 55.8
Manganese (Mn), % 8.0 to 10
0 to 1.0
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 5.5 to 7.5
19 to 22
Nitrogen (N), % 0.15 to 0.4
0.2 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.015