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AISI 429 Stainless Steel vs. SAE-AISI 6118 Steel

Both AISI 429 stainless steel and SAE-AISI 6118 steel are iron alloys. Both are furnished in the annealed condition. They have 85% of their average alloy composition in common. There are 31 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 AISI 429 stainless steel and the bottom bar is SAE-AISI 6118 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
140
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25
23
Fatigue Strength, MPa 180
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 300
300
Tensile Strength: Ultimate (UTS), MPa 480
470
Tensile Strength: Yield (Proof), MPa 260
290

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 810
410
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
45
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.7
Embodied Energy, MJ/kg 28
23
Embodied Water, L/kg 110
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
93
Resilience: Unit (Modulus of Resilience), kJ/m3 170
220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 18
17
Thermal Diffusivity, mm2/s 6.9
12
Thermal Shock Resistance, points 17
14

Alloy Composition

Carbon (C), % 0 to 0.12
0.16 to 0.21
Chromium (Cr), % 14 to 16
0.5 to 0.7
Iron (Fe), % 81.8 to 86
97.8 to 98.6
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0
0.1 to 0.15