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S21900 Stainless Steel vs. S45500 Stainless Steel

Both S21900 stainless steel and S45500 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S21900 stainless steel and the bottom bar is S45500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
280 to 500
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
3.4 to 11
Fatigue Strength, MPa 380
570 to 890
Poisson's Ratio 0.28
0.28
Reduction in Area, % 57
34 to 45
Shear Modulus, GPa 78
75
Shear Strength, MPa 510
790 to 1090
Tensile Strength: Ultimate (UTS), MPa 710
1370 to 1850
Tensile Strength: Yield (Proof), MPa 390
1240 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 420
620
Maximum Temperature: Mechanical, °C 980
760
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
11

Otherwise Unclassified Properties

Base Metal Price, % relative 15
17
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
3.8
Embodied Energy, MJ/kg 43
57
Embodied Water, L/kg 160
120

Common Calculations

PREN (Pitting Resistance) 25
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
45 to 190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
48 to 65
Strength to Weight: Bending, points 23
35 to 42
Thermal Shock Resistance, points 15
48 to 64

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 19 to 21.5
11 to 12.5
Copper (Cu), % 0
1.5 to 2.5
Iron (Fe), % 59.4 to 67.4
71.5 to 79.2
Manganese (Mn), % 8.0 to 10
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 5.5 to 7.5
7.5 to 9.5
Niobium (Nb), % 0
0 to 0.5
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 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.8 to 1.4