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ASTM A36 Carbon Steel vs. AISI 321H Stainless Steel

Both ASTM A36 carbon steel and AISI 321H stainless steel are iron alloys. They have 70% 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 ASTM A36 carbon steel and the bottom bar is AISI 321H stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
40
Fatigue Strength, MPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 300
400
Tensile Strength: Ultimate (UTS), MPa 480
580
Tensile Strength: Yield (Proof), MPa 290
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
940
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 50
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 14
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.2
Embodied Energy, MJ/kg 18
46
Embodied Water, L/kg 44
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
190
Resilience: Unit (Modulus of Resilience), kJ/m3 220
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 17
20
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 16
12

Alloy Composition

Carbon (C), % 0 to 0.26
0.040 to 0.1
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 99.25 to 100
65.4 to 74
Manganese (Mn), % 0
0 to 2.0
Nickel (Ni), % 0
9.0 to 12
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.4
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030
Titanium (Ti), % 0
0 to 0.7