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S21800 Stainless Steel vs. N08800 Stainless Steel

Both S21800 stainless steel and N08800 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is N08800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
4.5 to 34
Fatigue Strength, MPa 330
150 to 390
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Shear Strength, MPa 510
340 to 580
Tensile Strength: Ultimate (UTS), MPa 740
500 to 1000
Tensile Strength: Yield (Proof), MPa 390
190 to 830

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Corrosion, °C 410
490
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1360
1390
Melting Onset (Solidus), °C 1310
1360
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 15
30
Density, g/cm3 7.5
8.0
Embodied Carbon, kg CO2/kg material 3.1
5.3
Embodied Energy, MJ/kg 45
76
Embodied Water, L/kg 150
200

Common Calculations

PREN (Pitting Resistance) 19
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
42 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 390
96 to 1740
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 27
18 to 35
Strength to Weight: Bending, points 24
18 to 28
Thermal Shock Resistance, points 17
13 to 25

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0 to 0.1
0 to 0.1
Chromium (Cr), % 16 to 18
19 to 23
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 59.1 to 65.4
39.5 to 50.7
Manganese (Mn), % 7.0 to 9.0
0 to 1.5
Nickel (Ni), % 8.0 to 9.0
30 to 35
Nitrogen (N), % 0.080 to 0.18
0
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 0.015
Titanium (Ti), % 0
0.15 to 0.6