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AISI 409 Stainless Steel vs. ASTM A302 Alloy Steel

Both AISI 409 stainless steel and ASTM A302 alloy steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 409 stainless steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
20 to 23
Fatigue Strength, MPa 140
250 to 280
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 270
370 to 390
Tensile Strength: Ultimate (UTS), MPa 420
590 to 620
Tensile Strength: Yield (Proof), MPa 200
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 710
410
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
39 to 51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.4 to 3.0
Density, g/cm3 7.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 2.0
1.5 to 1.6
Embodied Energy, MJ/kg 28
20 to 21
Embodied Water, L/kg 94
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 100
330 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
21 to 22
Strength to Weight: Bending, points 16
20 to 21
Thermal Diffusivity, mm2/s 6.7
10 to 14
Thermal Shock Resistance, points 15
17 to 18