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ASTM A356 Grade 9 vs. AISI 409Cb Stainless Steel

Both ASTM A356 grade 9 and AISI 409Cb stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 30 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 ASTM A356 grade 9 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, % 17
24
Fatigue Strength, MPa 310
140
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 670
420
Tensile Strength: Yield (Proof), MPa 460
200

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 440
710
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.6
8.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.4
2.2
Embodied Energy, MJ/kg 33
31
Embodied Water, L/kg 56
94

Common Calculations

PREN (Pitting Resistance) 4.7
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
83
Resilience: Unit (Modulus of Resilience), kJ/m3 570
100
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
15
Strength to Weight: Bending, points 22
16
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.060
Chromium (Cr), % 1.0 to 1.5
10.5 to 11.7
Iron (Fe), % 95.2 to 97.2
84.9 to 89.5
Manganese (Mn), % 0.5 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.2
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), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0.2 to 0.35
0