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ASTM A321 Carbon Steel vs. AISI 414 Stainless Steel

Both ASTM A321 carbon steel and AISI 414 stainless steel are iron alloys. 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 (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A321 carbon steel and the bottom bar is AISI 414 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
17
Fatigue Strength, MPa 270
430 to 480
Poisson's Ratio 0.29
0.28
Reduction in Area, % 39
50
Shear Modulus, GPa 73
76
Shear Strength, MPa 420
550 to 590
Tensile Strength: Ultimate (UTS), MPa 670
900 to 960
Tensile Strength: Yield (Proof), MPa 390
700 to 790

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
750
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
25
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
8.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
2.1
Embodied Energy, MJ/kg 18
29
Embodied Water, L/kg 46
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 400
1260 to 1590
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24
32 to 34
Strength to Weight: Bending, points 22
27 to 28
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 21
33 to 35

Alloy Composition

Carbon (C), % 0 to 0.55
0 to 0.15
Chromium (Cr), % 0
11.5 to 13.5
Iron (Fe), % 98.1 to 99.25
81.8 to 87.3
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Nickel (Ni), % 0
1.3 to 2.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030