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ACI-ASTM CA6NM Steel vs. S39274 Stainless Steel

Both ACI-ASTM CA6NM steel and S39274 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 33 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 S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
270
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 17
17
Fatigue Strength, MPa 380
380
Poisson's Ratio 0.28
0.27
Reduction in Area, % 40
34
Shear Modulus, GPa 76
81
Tensile Strength: Ultimate (UTS), MPa 850
900
Tensile Strength: Yield (Proof), MPa 620
620

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 770
1100
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.5
4.3
Embodied Energy, MJ/kg 34
60
Embodied Water, L/kg 110
180

Common Calculations

PREN (Pitting Resistance) 15
43
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1000
940
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
32
Strength to Weight: Bending, points 26
26
Thermal Diffusivity, mm2/s 6.7
4.2
Thermal Shock Resistance, points 31
25

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 11.5 to 14
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 78.4 to 84.6
57 to 65.6
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 1.0
2.5 to 3.5
Nickel (Ni), % 3.5 to 4.5
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0
1.5 to 2.5