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ACI-ASTM CA40F Steel vs. AISI 304 Stainless Steel

Both ACI-ASTM CA40F steel and AISI 304 stainless steel are iron alloys. They have 84% 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 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
170 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13
8.0 to 43
Fatigue Strength, MPa 320
210 to 440
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 770
580 to 1180
Tensile Strength: Yield (Proof), MPa 550
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
710
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
16
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
15
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.0
Embodied Energy, MJ/kg 28
43
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 94
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 790
140 to 1870
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
21 to 42
Strength to Weight: Bending, points 24
20 to 32
Thermal Diffusivity, mm2/s 7.2
4.2
Thermal Shock Resistance, points 28
12 to 25

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.080
Chromium (Cr), % 11.5 to 14
18 to 20
Iron (Fe), % 81.6 to 88.3
66.5 to 74
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 1.0
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
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