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Type 4 Magnetic Alloy vs. ASTM Grade HP Steel

Type 4 magnetic alloy belongs to the nickel alloys classification, while ASTM grade HP steel belongs to the iron alloys. They have 50% 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 Type 4 magnetic alloy and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 2.0 to 40
5.1
Fatigue Strength, MPa 220 to 400
130
Poisson's Ratio 0.31
0.28
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 620 to 1100
490
Tensile Strength: Yield (Proof), MPa 270 to 1040
260

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1420
1370
Melting Onset (Solidus), °C 1370
1330
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 60
34
Density, g/cm3 8.8
7.9
Embodied Carbon, kg CO2/kg material 10
5.8
Embodied Energy, MJ/kg 140
82
Embodied Water, L/kg 210
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 22 to 200
21
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 2840
170
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19 to 35
17
Strength to Weight: Bending, points 18 to 27
17
Thermal Shock Resistance, points 21 to 37
11

Alloy Composition

Carbon (C), % 0 to 0.050
0.35 to 0.75
Chromium (Cr), % 0 to 0.3
24 to 28
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 9.5 to 17.5
29.2 to 42.7
Manganese (Mn), % 0 to 0.8
0 to 2.0
Molybdenum (Mo), % 3.5 to 6.0
0 to 0.5
Nickel (Ni), % 79 to 82
33 to 37
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.5
Sulfur (S), % 0 to 0.020
0 to 0.040