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AISI 309S Stainless Steel vs. ACI-ASTM CD3MN Steel

Both AISI 309S stainless steel and ACI-ASTM CD3MN steel are iron alloys. They have a moderately high 91% 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 AISI 309S stainless steel and the bottom bar is ACI-ASTM CD3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 42
29
Fatigue Strength, MPa 210
340
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 580
710
Tensile Strength: Yield (Proof), MPa 230
460

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 440
430
Maximum Temperature: Mechanical, °C 1080
1060
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
3.6
Embodied Energy, MJ/kg 51
50
Embodied Water, L/kg 170
160

Common Calculations

PREN (Pitting Resistance) 23
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
530
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
25
Strength to Weight: Bending, points 20
23
Thermal Diffusivity, mm2/s 4.0
4.3
Thermal Shock Resistance, points 13
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 22 to 24
21 to 23.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 58.1 to 66
62.6 to 71.9
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 12 to 15
4.5 to 6.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020