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S21904 Stainless Steel vs. AISI 316Cb Stainless Steel

Both S21904 stainless steel and AISI 316Cb stainless steel are iron alloys. They have 88% 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 S21904 stainless steel and the bottom bar is AISI 316Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17 to 51
34
Fatigue Strength, MPa 380 to 550
180
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Shear Strength, MPa 510 to 620
390
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
580
Tensile Strength: Yield (Proof), MPa 390 to 910
230

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 430
490
Maximum Temperature: Mechanical, °C 980
940
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 15
22
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
4.4
Embodied Energy, MJ/kg 43
61
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
160
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
20
Strength to Weight: Bending, points 23 to 29
20
Thermal Diffusivity, mm2/s 3.8
4.1
Thermal Shock Resistance, points 15 to 21
13

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.080
Chromium (Cr), % 19 to 21.5
16 to 18
Iron (Fe), % 59.5 to 67.4
60.9 to 72
Manganese (Mn), % 8.0 to 10
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 5.5 to 7.5
10 to 14
Niobium (Nb), % 0
0 to 1.1
Nitrogen (N), % 0.15 to 0.4
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030