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ACI-ASTM CA6NM Steel vs. S46800 Stainless Steel

Both ACI-ASTM CA6NM steel and S46800 stainless steel are iron alloys. They have a moderately high 93% 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 CA6NM steel and the bottom bar is S46800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
25
Fatigue Strength, MPa 380
160
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 850
470
Tensile Strength: Yield (Proof), MPa 620
230

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 390
500
Maximum Temperature: Mechanical, °C 770
920
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
23
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.5
2.6
Embodied Energy, MJ/kg 34
37
Embodied Water, L/kg 110
130

Common Calculations

PREN (Pitting Resistance) 15
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
98
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
17
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 6.7
6.1
Thermal Shock Resistance, points 31
16

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 11.5 to 14
18 to 20
Iron (Fe), % 78.4 to 84.6
76.5 to 81.8
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 3.5 to 4.5
0 to 0.5
Niobium (Nb), % 0
0.1 to 0.6
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.070 to 0.3