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ACI-ASTM CB6 Steel vs. S21800 Stainless Steel

Both ACI-ASTM CB6 steel and S21800 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 28 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 ACI-ASTM CB6 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 18
40
Fatigue Strength, MPa 410
330
Poisson's Ratio 0.28
0.28
Reduction in Area, % 40
62
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 880
740
Tensile Strength: Yield (Proof), MPa 660
390

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 870
900
Melting Completion (Liquidus), °C 1440
1360
Melting Onset (Solidus), °C 1390
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 2.5
3.1
Embodied Energy, MJ/kg 36
45
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 17
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
250
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 32
27
Strength to Weight: Bending, points 26
24
Thermal Shock Resistance, points 31
17

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.1
Chromium (Cr), % 15.5 to 17.5
16 to 18
Iron (Fe), % 74.4 to 81
59.1 to 65.4
Manganese (Mn), % 0 to 1.0
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 3.5 to 5.5
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030