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AISI 409 Stainless Steel vs. ACI-ASTM CB30 Steel

Both AISI 409 stainless steel and ACI-ASTM CB30 steel are iron alloys. They have 90% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 409 stainless steel and the bottom bar is ACI-ASTM CB30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 420
500
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 710
940
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
21
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.3
Embodied Energy, MJ/kg 28
33
Embodied Water, L/kg 94
130

Common Calculations

PREN (Pitting Resistance) 11
20
Resilience: Unit (Modulus of Resilience), kJ/m3 100
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
18
Strength to Weight: Bending, points 16
18
Thermal Diffusivity, mm2/s 6.7
5.6
Thermal Shock Resistance, points 15
17

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.3
Chromium (Cr), % 10.5 to 11.7
18 to 21
Copper (Cu), % 0
0 to 1.2
Iron (Fe), % 84.9 to 89.5
72.9 to 82
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.5
0 to 2.0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 0 to 0.75
0