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ASTM A387 Grade 21 Steel vs. Nickel 908

ASTM A387 grade 21 steel belongs to the iron alloys classification, while nickel 908 belongs to the nickel alloys. They have 44% of their average alloy composition in common. There are 29 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 nickel 908.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 21
11
Fatigue Strength, MPa 160 to 250
450
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 74
70
Shear Strength, MPa 310 to 370
800
Tensile Strength: Ultimate (UTS), MPa 500 to 590
1340
Tensile Strength: Yield (Proof), MPa 230 to 350
930

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 480
920
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 41
11
Thermal Expansion, µm/m-K 13
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
50
Density, g/cm3 7.9
8.3
Embodied Carbon, kg CO2/kg material 1.8
9.3
Embodied Energy, MJ/kg 23
140
Embodied Water, L/kg 62
170

Common Calculations

PREN (Pitting Resistance) 6.4
4.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
2340
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18 to 21
45
Strength to Weight: Bending, points 18 to 20
33
Thermal Diffusivity, mm2/s 11
2.9
Thermal Shock Resistance, points 14 to 17
61

Alloy Composition

Aluminum (Al), % 0
0.75 to 1.3
Boron (B), % 0
0 to 0.012
Carbon (C), % 0.050 to 0.15
0 to 0.030
Chromium (Cr), % 2.8 to 3.3
3.8 to 4.5
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 94.4 to 96
35.6 to 44.6
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
47 to 51
Niobium (Nb), % 0
2.7 to 3.3
Phosphorus (P), % 0 to 0.025
0 to 0.015
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.0050
Titanium (Ti), % 0
1.2 to 1.8