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AISI 321 Stainless Steel vs. SAE-AISI 1144 Steel

Both AISI 321 stainless steel and SAE-AISI 1144 steel are iron alloys. They have 71% 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 AISI 321 stainless steel and the bottom bar is SAE-AISI 1144 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
11 to 17
Fatigue Strength, MPa 220 to 270
280 to 430
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 420 to 460
460 to 510
Tensile Strength: Ultimate (UTS), MPa 590 to 690
750 to 840
Tensile Strength: Yield (Proof), MPa 220 to 350
420 to 690

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 870
400
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 16
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.4
Embodied Energy, MJ/kg 45
19
Embodied Water, L/kg 140
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
91 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
480 to 1290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
27 to 30
Strength to Weight: Bending, points 20 to 22
23 to 25
Thermal Diffusivity, mm2/s 4.1
14
Thermal Shock Resistance, points 13 to 15
22 to 24

Alloy Composition

Carbon (C), % 0 to 0.080
0.4 to 0.48
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 65.3 to 74
97.5 to 98
Manganese (Mn), % 0 to 2.0
1.4 to 1.7
Nickel (Ni), % 9.0 to 12
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0.24 to 0.33
Titanium (Ti), % 0 to 0.7
0

Comparable Variants