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AISI 420 Stainless Steel vs. Type 4 Magnetic Alloy

AISI 420 stainless steel belongs to the iron alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. 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 AISI 420 stainless steel and the bottom bar is Type 4 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
2.0 to 40
Fatigue Strength, MPa 220 to 670
220 to 400
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 76
73
Shear Strength, MPa 420 to 1010
420 to 630
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
620 to 1100
Tensile Strength: Yield (Proof), MPa 380 to 1310
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Mechanical, °C 620
900
Melting Completion (Liquidus), °C 1510
1420
Melting Onset (Solidus), °C 1450
1370
Specific Heat Capacity, J/kg-K 480
440
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
60
Density, g/cm3 7.7
8.8
Embodied Carbon, kg CO2/kg material 2.0
10
Embodied Energy, MJ/kg 28
140
Embodied Water, L/kg 100
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
190 to 2840
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 25 to 62
19 to 35
Strength to Weight: Bending, points 22 to 41
18 to 27
Thermal Shock Resistance, points 25 to 62
21 to 37

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.050
Chromium (Cr), % 12 to 14
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 82.3 to 87.9
9.5 to 17.5
Manganese (Mn), % 0 to 1.0
0 to 0.8
Molybdenum (Mo), % 0 to 0.5
3.5 to 6.0
Nickel (Ni), % 0 to 0.75
79 to 82
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020

Comparable Variants