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AISI 431 Stainless Steel vs. ASTM A266 Carbon Steel

Both AISI 431 stainless steel and ASTM A266 carbon steel are iron alloys. 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 431 stainless steel and the bottom bar is ASTM A266 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
21 to 26
Fatigue Strength, MPa 430 to 610
170 to 200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 550 to 840
320 to 380
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
500 to 600
Tensile Strength: Yield (Proof), MPa 710 to 1040
230 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 850
400
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
51 to 52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.4
Embodied Energy, MJ/kg 31
18 to 19
Embodied Water, L/kg 120
46 to 47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
140 to 230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
18 to 21
Strength to Weight: Bending, points 27 to 36
18 to 20
Thermal Diffusivity, mm2/s 7.0
14
Thermal Shock Resistance, points 28 to 43
16 to 19