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Type 4 Magnetic Alloy vs. AISI 304 Stainless Steel

Type 4 magnetic alloy belongs to the nickel alloys classification, while AISI 304 stainless steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is Type 4 magnetic alloy and the bottom bar is AISI 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 2.0 to 40
8.0 to 43
Fatigue Strength, MPa 220 to 400
210 to 440
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 420 to 630
400 to 690
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
580 to 1180
Tensile Strength: Yield (Proof), MPa 270 to 1040
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Mechanical, °C 900
710
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 60
15
Density, g/cm3 8.8
7.8
Embodied Carbon, kg CO2/kg material 10
3.0
Embodied Energy, MJ/kg 140
43
Embodied Water, L/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
140 to 1870
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19 to 35
21 to 42
Strength to Weight: Bending, points 18 to 27
20 to 32
Thermal Shock Resistance, points 21 to 37
12 to 25

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 0 to 0.3
18 to 20
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 9.5 to 17.5
66.5 to 74
Manganese (Mn), % 0 to 0.8
0 to 2.0
Molybdenum (Mo), % 3.5 to 6.0
0
Nickel (Ni), % 79 to 82
8.0 to 10.5
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.010
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.020
0 to 0.030

Comparable Variants