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ACI-ASTM CA40 Steel vs. AISI 415 Stainless Steel

Both ACI-ASTM CA40 steel and AISI 415 stainless 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 (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA40 steel and the bottom bar is AISI 415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 310
260
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 10
17
Fatigue Strength, MPa 460
430
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 910
900
Tensile Strength: Yield (Proof), MPa 860
700

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 750
780
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1500
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
24
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
11
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.5
Embodied Energy, MJ/kg 28
35
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 14
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 89
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1910
1250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 33
32
Strength to Weight: Bending, points 27
26
Thermal Diffusivity, mm2/s 6.7
6.4
Thermal Shock Resistance, points 33
33

Alloy Composition

Carbon (C), % 0.2 to 0.4
0 to 0.050
Chromium (Cr), % 11.5 to 14
11.5 to 14
Iron (Fe), % 81.5 to 88.3
77.8 to 84
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.5
0.5 to 1.0
Nickel (Ni), % 0 to 1.0
3.5 to 5.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030