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S21904 Stainless Steel vs. S15500 Stainless Steel

Both S21904 stainless steel and S15500 stainless steel are iron alloys. They have 84% 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 S21904 stainless steel and the bottom bar is S15500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
290 to 430
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
6.8 to 16
Fatigue Strength, MPa 380 to 550
350 to 650
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 510 to 620
540 to 870
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
890 to 1490
Tensile Strength: Yield (Proof), MPa 390 to 910
590 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
440
Maximum Temperature: Mechanical, °C 980
820
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1350
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
17
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 43
39
Embodied Water, L/kg 160
130

Common Calculations

PREN (Pitting Resistance) 25
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
98 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
890 to 4460
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
32 to 53
Strength to Weight: Bending, points 23 to 29
26 to 37
Thermal Diffusivity, mm2/s 3.8
4.6
Thermal Shock Resistance, points 15 to 21
30 to 50

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.070
Chromium (Cr), % 19 to 21.5
14 to 15.5
Copper (Cu), % 0
2.5 to 4.5
Iron (Fe), % 59.5 to 67.4
71.9 to 79.9
Manganese (Mn), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 5.5 to 7.5
3.5 to 5.5
Niobium (Nb), % 0
0.15 to 0.45
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030