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S21603 Stainless Steel vs. Type 3 Magnetic Alloy

S21603 stainless steel belongs to the iron alloys classification, while Type 3 magnetic alloy belongs to the nickel alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 26 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S21603 stainless steel and the bottom bar is Type 3 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 45
43
Fatigue Strength, MPa 360
170
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 79
70
Shear Strength, MPa 490
380
Tensile Strength: Ultimate (UTS), MPa 690
550
Tensile Strength: Yield (Proof), MPa 390
210

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Mechanical, °C 990
910
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1380
1320
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 17
55
Density, g/cm3 7.7
8.7
Embodied Carbon, kg CO2/kg material 3.6
8.7
Embodied Energy, MJ/kg 50
120
Embodied Water, L/kg 160
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
190
Resilience: Unit (Modulus of Resilience), kJ/m3 380
120
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 25
18
Strength to Weight: Bending, points 22
17
Thermal Shock Resistance, points 15
18

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.050
Chromium (Cr), % 17.5 to 22
2.0 to 3.0
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
4.0 to 6.0
Iron (Fe), % 57.6 to 67.8
9.9 to 19
Manganese (Mn), % 7.5 to 9.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 5.0 to 7.0
75 to 78
Nitrogen (N), % 0.25 to 0.5
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 0.020