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AISI 321 Stainless Steel vs. SAE-AISI 1039 Steel

Both AISI 321 stainless steel and SAE-AISI 1039 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 1039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
14 to 18
Fatigue Strength, MPa 220 to 270
230 to 370
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 460
380 to 420
Tensile Strength: Ultimate (UTS), MPa 590 to 690
610 to 690
Tensile Strength: Yield (Proof), MPa 220 to 350
340 to 580

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 870
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 16
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.4
Embodied Energy, MJ/kg 45
18
Embodied Water, L/kg 140
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
88 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
310 to 890
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
22 to 24
Strength to Weight: Bending, points 20 to 22
20 to 22
Thermal Diffusivity, mm2/s 4.1
14
Thermal Shock Resistance, points 13 to 15
19 to 22

Alloy Composition

Carbon (C), % 0 to 0.080
0.37 to 0.44
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 65.3 to 74
98.5 to 98.9
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
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 to 0.050
Titanium (Ti), % 0 to 0.7
0

Comparable Variants