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EN 1.4869 Casting Alloy vs. ASTM A387 Grade 21 Steel

EN 1.4869 casting alloy belongs to the nickel alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4869 casting alloy and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 5.7
21
Fatigue Strength, MPa 130
160 to 250
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
74
Tensile Strength: Ultimate (UTS), MPa 540
500 to 590
Tensile Strength: Yield (Proof), MPa 310
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 330
260
Maximum Temperature: Mechanical, °C 1200
480
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 10
41
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
4.1
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 7.7
1.8
Embodied Energy, MJ/kg 110
23
Embodied Water, L/kg 300
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 26
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 230
140 to 320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 18
18 to 21
Strength to Weight: Bending, points 17
18 to 20
Thermal Diffusivity, mm2/s 2.6
11
Thermal Shock Resistance, points 14
14 to 17

Alloy Composition

Carbon (C), % 0.45 to 0.55
0.050 to 0.15
Chromium (Cr), % 24 to 26
2.8 to 3.3
Cobalt (Co), % 14 to 16
0
Iron (Fe), % 11.4 to 23.6
94.4 to 96
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 33 to 37
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 1.0 to 2.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 4.0 to 6.0
0