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AISI 405 Stainless Steel vs. AISI 429 Stainless Steel

Both AISI 405 stainless steel and AISI 429 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 98% of their average alloy composition in common. There are 35 material properties with values for both materials. Properties with values for just one material (1, 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 429 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
25
Fatigue Strength, MPa 130
180
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
50
Rockwell B Hardness 76
78
Shear Modulus, GPa 76
77
Shear Strength, MPa 300
300
Tensile Strength: Ultimate (UTS), MPa 470
480
Tensile Strength: Yield (Proof), MPa 200
260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
400
Maximum Temperature: Mechanical, °C 820
810
Melting Completion (Liquidus), °C 1530
1440
Melting Onset (Solidus), °C 1480
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
26
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
7.5
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.0
Embodied Energy, MJ/kg 28
28
Embodied Water, L/kg 100
110

Common Calculations

PREN (Pitting Resistance) 13
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84
99
Resilience: Unit (Modulus of Resilience), kJ/m3 100
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 17
18
Thermal Diffusivity, mm2/s 8.1
6.9
Thermal Shock Resistance, points 16
17

Alloy Composition

Aluminum (Al), % 0.1 to 0.3
0
Carbon (C), % 0 to 0.080
0 to 0.12
Chromium (Cr), % 11.5 to 14.5
14 to 16
Iron (Fe), % 82.5 to 88.4
81.8 to 86
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030