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SAE-AISI 1340 Steel vs. AISI 409Cb Stainless Steel

Both SAE-AISI 1340 steel and AISI 409Cb stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 30 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 SAE-AISI 1340 steel and the bottom bar is AISI 409Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
24
Fatigue Strength, MPa 220 to 390
140
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Shear Strength, MPa 340 to 440
270
Tensile Strength: Ultimate (UTS), MPa 540 to 730
420
Tensile Strength: Yield (Proof), MPa 300 to 620
200

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
710
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
8.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.2
Embodied Energy, MJ/kg 19
31
Embodied Water, L/kg 48
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 110
83
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 1040
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19 to 26
15
Strength to Weight: Bending, points 19 to 23
16
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 17 to 23
15

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.060
Chromium (Cr), % 0
10.5 to 11.7
Iron (Fe), % 97.2 to 97.9
84.9 to 89.5
Manganese (Mn), % 1.6 to 1.9
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Niobium (Nb), % 0
0 to 0.75
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.040