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S21800 Stainless Steel vs. AISI 301 Stainless Steel

Both S21800 stainless steel and AISI 301 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is AISI 301 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
190 to 440
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
7.4 to 46
Fatigue Strength, MPa 330
210 to 600
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 510
410 to 860
Tensile Strength: Ultimate (UTS), MPa 740
590 to 1460
Tensile Strength: Yield (Proof), MPa 390
230 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
840
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1310
1400
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 15
13
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.7
Embodied Energy, MJ/kg 45
39
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
99 to 300
Resilience: Unit (Modulus of Resilience), kJ/m3 390
130 to 2970
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
21 to 52
Strength to Weight: Bending, points 24
20 to 37
Thermal Shock Resistance, points 17
12 to 31

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 59.1 to 65.4
70.7 to 78
Manganese (Mn), % 7.0 to 9.0
0 to 2.0
Nickel (Ni), % 8.0 to 9.0
6.0 to 8.0
Nitrogen (N), % 0.080 to 0.18
0 to 0.1
Phosphorus (P), % 0 to 0.060
0 to 0.045
Silicon (Si), % 3.5 to 4.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030