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Type 1 Magnetic Alloy vs. ASTM A387 Grade 21 Steel

Both Type 1 magnetic alloy and ASTM A387 grade 21 steel are iron alloys. They have 55% of their average alloy composition in common. There are 25 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 Type 1 magnetic alloy and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 4.0 to 38
21
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
74
Tensile Strength: Ultimate (UTS), MPa 500 to 830
500 to 590
Tensile Strength: Yield (Proof), MPa 220 to 790
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 31
4.1
Density, g/cm3 8.3
7.9
Embodied Carbon, kg CO2/kg material 5.6
1.8
Embodied Energy, MJ/kg 77
23
Embodied Water, L/kg 130
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 33 to 150
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 1690
140 to 320
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 17 to 28
18 to 21
Strength to Weight: Bending, points 17 to 24
18 to 20
Thermal Shock Resistance, points 16 to 26
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.050
0.050 to 0.15
Chromium (Cr), % 0 to 0.3
2.8 to 3.3
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 50.7 to 56.5
94.4 to 96
Manganese (Mn), % 0 to 0.8
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.3
0.9 to 1.1
Nickel (Ni), % 43.5 to 46.5
0
Phosphorus (P), % 0 to 0.010
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025

Comparable Variants