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AISI 309HCb Stainless Steel vs. ACI-ASTM CG12 Steel

Both AISI 309HCb stainless steel and ACI-ASTM CG12 steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 309HCb stainless steel and the bottom bar is ACI-ASTM CG12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 46
40
Fatigue Strength, MPa 210
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 590
550
Tensile Strength: Yield (Proof), MPa 230
220

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 510
430
Maximum Temperature: Mechanical, °C 1090
1040
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 23
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
3.3
Embodied Energy, MJ/kg 59
48
Embodied Water, L/kg 170
160

Common Calculations

PREN (Pitting Resistance) 23
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
180
Resilience: Unit (Modulus of Resilience), kJ/m3 130
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
20
Strength to Weight: Bending, points 20
19
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 13
12

Alloy Composition

Carbon (C), % 0.040 to 0.1
0 to 0.12
Chromium (Cr), % 22 to 24
20 to 23
Iron (Fe), % 56 to 66
60.3 to 70
Manganese (Mn), % 0 to 2.0
0 to 1.5
Nickel (Ni), % 12 to 16
10 to 13
Niobium (Nb), % 0 to 1.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040