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S21800 Stainless Steel vs. SAE-AISI D2 Steel

Both S21800 stainless steel and SAE-AISI D2 steel are iron alloys. They have 75% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is SAE-AISI D2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 40
5.0 to 16
Fatigue Strength, MPa 330
310 to 860
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 510
460 to 1160
Tensile Strength: Ultimate (UTS), MPa 740
760 to 2000
Tensile Strength: Yield (Proof), MPa 390
470 to 1510

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Melting Completion (Liquidus), °C 1360
1440
Melting Onset (Solidus), °C 1310
1390
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 15
8.0
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 3.1
3.4
Embodied Energy, MJ/kg 45
50
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 19
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
92 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 390
570 to 5940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
27 to 72
Strength to Weight: Bending, points 24
24 to 46
Thermal Shock Resistance, points 17
25 to 67

Alloy Composition

Carbon (C), % 0 to 0.1
1.4 to 1.6
Chromium (Cr), % 16 to 18
11 to 13
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 59.1 to 65.4
81.3 to 86.9
Manganese (Mn), % 7.0 to 9.0
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
Nickel (Ni), % 8.0 to 9.0
0 to 0.3
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.030
Silicon (Si), % 3.5 to 4.5
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0 to 1.1