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ACI-ASTM CA6N Steel vs. S40945 Stainless Steel

Both ACI-ASTM CA6N steel and S40945 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6N steel and the bottom bar is S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
25
Fatigue Strength, MPa 640
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 1080
430
Tensile Strength: Yield (Proof), MPa 1060
230

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 740
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
26
Thermal Expansion, µm/m-K 9.9
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
2.2
Embodied Energy, MJ/kg 35
31
Embodied Water, L/kg 110
94

Common Calculations

PREN (Pitting Resistance) 12
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
89
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 30
16
Thermal Diffusivity, mm2/s 6.1
6.9
Thermal Shock Resistance, points 40
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 10.5 to 12.5
10.5 to 11.7
Iron (Fe), % 77.9 to 83.5
85.1 to 89.3
Manganese (Mn), % 0 to 0.5
0 to 1.0
Nickel (Ni), % 6.0 to 8.0
0 to 0.5
Niobium (Nb), % 0
0.18 to 0.4
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Titanium (Ti), % 0
0.050 to 0.2