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AISI 321 Stainless Steel vs. SAE-AISI 1049 Steel

Both AISI 321 stainless steel and SAE-AISI 1049 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 (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 1049 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
11 to 17
Fatigue Strength, MPa 220 to 270
250 to 400
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 420 to 460
420 to 450
Tensile Strength: Ultimate (UTS), MPa 590 to 690
680 to 750
Tensile Strength: Yield (Proof), MPa 220 to 350
370 to 640

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
75 to 99
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
370 to 1090
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
24 to 27
Strength to Weight: Bending, points 20 to 22
22 to 23
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
0.46 to 0.53
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 65.3 to 74
98.5 to 98.9
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
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