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AISI 405 Stainless Steel vs. AISI 309HCb Stainless Steel

Both AISI 405 stainless steel and AISI 309HCb stainless steel are iron alloys. Both are furnished in the annealed condition. They have 75% 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 405 stainless steel and the bottom bar is AISI 309HCb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
46
Fatigue Strength, MPa 130
210
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 76
82
Shear Modulus, GPa 76
78
Shear Strength, MPa 300
410
Tensile Strength: Ultimate (UTS), MPa 470
590
Tensile Strength: Yield (Proof), MPa 200
230

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
510
Maximum Temperature: Mechanical, °C 820
1090
Melting Completion (Liquidus), °C 1530
1420
Melting Onset (Solidus), °C 1480
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
23
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
4.1
Embodied Energy, MJ/kg 28
59
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 13
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
210
Resilience: Unit (Modulus of Resilience), kJ/m3 100
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 17
20
Thermal Diffusivity, mm2/s 8.1
4.0
Thermal Shock Resistance, points 16
13

Alloy Composition

Aluminum (Al), % 0.1 to 0.3
0
Carbon (C), % 0 to 0.080
0.040 to 0.1
Chromium (Cr), % 11.5 to 14.5
22 to 24
Iron (Fe), % 82.5 to 88.4
56 to 66
Manganese (Mn), % 0 to 1.0
0 to 2.0
Nickel (Ni), % 0 to 0.6
12 to 16
Niobium (Nb), % 0
0 to 1.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030