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ACI-ASTM CA6NM Steel vs. AISI 416 Stainless Steel

Both ACI-ASTM CA6NM steel and AISI 416 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 (2, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA6NM steel and the bottom bar is AISI 416 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
230 to 320
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
13 to 31
Fatigue Strength, MPa 380
230 to 340
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 850
510 to 800
Tensile Strength: Yield (Proof), MPa 620
290 to 600

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 770
680
Melting Completion (Liquidus), °C 1450
1530
Melting Onset (Solidus), °C 1400
1480
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
30
Thermal Expansion, µm/m-K 10
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.5
1.9
Embodied Energy, MJ/kg 34
27
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 15
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
98 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
220 to 940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
18 to 29
Strength to Weight: Bending, points 26
18 to 25
Thermal Diffusivity, mm2/s 6.7
8.1
Thermal Shock Resistance, points 31
19 to 30

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.15
Chromium (Cr), % 11.5 to 14
12 to 14
Iron (Fe), % 78.4 to 84.6
83.2 to 87.9
Manganese (Mn), % 0 to 1.0
0 to 1.3
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0.15 to 0.35