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AISI 309H Stainless Steel vs. ACI-ASTM CC50 Steel

Both AISI 309H stainless steel and ACI-ASTM CC50 steel are iron alloys. They have 88% of their average alloy composition in common. There are 27 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 AISI 309H stainless steel and the bottom bar is ACI-ASTM CC50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 580
430

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 440
460
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 19
14
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.6
2.7
Embodied Energy, MJ/kg 51
39
Embodied Water, L/kg 170
170

Common Calculations

PREN (Pitting Resistance) 23
28
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 21
16
Strength to Weight: Bending, points 20
17
Thermal Diffusivity, mm2/s 4.0
4.5
Thermal Shock Resistance, points 13
14

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.5
Chromium (Cr), % 22 to 24
26 to 30
Iron (Fe), % 58.1 to 66
62.9 to 74
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 12 to 15
0 to 4.0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040