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AISI 409 Stainless Steel vs. ASTM A572 Steel

Both AISI 409 stainless steel and ASTM A572 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 A572 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
18 to 25
Fatigue Strength, MPa 140
240 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 270
300 to 380
Tensile Strength: Ultimate (UTS), MPa 420
470 to 620
Tensile Strength: Yield (Proof), MPa 200
330 to 510

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 710
400
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
51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.2 to 8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
2.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.6
Embodied Energy, MJ/kg 28
22
Embodied Water, L/kg 94
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
100 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 100
290 to 690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
17 to 22
Strength to Weight: Bending, points 16
17 to 21
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 15
14 to 18