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AISI 321 Stainless Steel vs. Type 1 Magnetic Alloy

Both AISI 321 stainless steel and Type 1 magnetic alloy are iron alloys. They have 65% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is Type 1 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
4.0 to 38
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 590 to 690
500 to 830
Tensile Strength: Yield (Proof), MPa 220 to 350
220 to 790

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
31
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 3.2
5.6
Embodied Energy, MJ/kg 45
77
Embodied Water, L/kg 140
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
33 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
130 to 1690
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 21 to 25
17 to 28
Strength to Weight: Bending, points 20 to 22
17 to 24
Thermal Shock Resistance, points 13 to 15
16 to 26

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.050
Chromium (Cr), % 17 to 19
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 65.3 to 74
50.7 to 56.5
Manganese (Mn), % 0 to 2.0
0 to 0.8
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 9.0 to 12
43.5 to 46.5
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.010
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0