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AISI 415 Stainless Steel vs. AISI 309Cb Stainless Steel

Both AISI 415 stainless steel and AISI 309Cb stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 34 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 AISI 415 stainless steel and the bottom bar is AISI 309Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
39
Fatigue Strength, MPa 430
200
Poisson's Ratio 0.28
0.28
Reduction in Area, % 50
46
Shear Modulus, GPa 76
78
Shear Strength, MPa 550
390
Tensile Strength: Ultimate (UTS), MPa 900
580
Tensile Strength: Yield (Proof), MPa 700
230

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 390
510
Maximum Temperature: Mechanical, °C 780
1090
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 24
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
23
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.5
4.1
Embodied Energy, MJ/kg 35
59
Embodied Water, L/kg 110
170

Common Calculations

PREN (Pitting Resistance) 15
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
180
Resilience: Unit (Modulus of Resilience), kJ/m3 1250
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
20
Strength to Weight: Bending, points 26
20
Thermal Diffusivity, mm2/s 6.4
4.0
Thermal Shock Resistance, points 33
13

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 11.5 to 14
22 to 24
Iron (Fe), % 77.8 to 84
56 to 66
Manganese (Mn), % 0.5 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.5 to 1.0
0
Nickel (Ni), % 3.5 to 5.5
12 to 16
Niobium (Nb), % 0
0 to 1.1
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.6
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030