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ASTM A387 Grade 21 Steel vs. EN 2.4668 Nickel

ASTM A387 grade 21 steel belongs to the iron alloys classification, while EN 2.4668 nickel belongs to the nickel alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21 steel and the bottom bar is EN 2.4668 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
14
Fatigue Strength, MPa 160 to 250
590
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
75
Shear Strength, MPa 310 to 370
840
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1390
Tensile Strength: Yield (Proof), MPa 230 to 350
1160

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Maximum Temperature: Mechanical, °C 480
980
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 41
13
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
75
Density, g/cm3 7.9
8.3
Embodied Carbon, kg CO2/kg material 1.8
13
Embodied Energy, MJ/kg 23
190
Embodied Water, L/kg 62
250

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
3490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 21
46
Strength to Weight: Bending, points 18 to 20
33
Thermal Diffusivity, mm2/s 11
3.5
Thermal Shock Resistance, points 14 to 17
40

Alloy Composition

Aluminum (Al), % 0
0.3 to 0.7
Boron (B), % 0
0.0020 to 0.0060
Carbon (C), % 0.050 to 0.15
0.020 to 0.080
Chromium (Cr), % 2.8 to 3.3
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.4 to 96
11.2 to 24.6
Manganese (Mn), % 0.3 to 0.6
0 to 0.35
Molybdenum (Mo), % 0.9 to 1.1
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.7 to 5.5
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.015
Titanium (Ti), % 0
0.6 to 1.2