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ACI-ASTM CA40F Steel vs. AISI 309HCb Stainless Steel

Both ACI-ASTM CA40F steel and AISI 309HCb stainless steel are iron alloys. They have 75% 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 ACI-ASTM CA40F steel and the bottom bar is AISI 309HCb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13
46
Fatigue Strength, MPa 320
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 770
590
Tensile Strength: Yield (Proof), MPa 550
230

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
510
Maximum Temperature: Mechanical, °C 750
1090
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
23
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
4.1
Embodied Energy, MJ/kg 28
59
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 14
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
210
Resilience: Unit (Modulus of Resilience), kJ/m3 790
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
21
Strength to Weight: Bending, points 24
20
Thermal Diffusivity, mm2/s 7.2
4.0
Thermal Shock Resistance, points 28
13

Alloy Composition

Carbon (C), % 0.2 to 0.4
0.040 to 0.1
Chromium (Cr), % 11.5 to 14
22 to 24
Iron (Fe), % 81.6 to 88.3
56 to 66
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
12 to 16
Niobium (Nb), % 0
0 to 1.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 0.75
Sulfur (S), % 0.2 to 0.4
0 to 0.030