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Nickel 689 vs. ASTM A387 Grade 21 Steel

Nickel 689 belongs to the nickel alloys classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is nickel 689 and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 350
150 to 180
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
21
Fatigue Strength, MPa 420
160 to 250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
74
Shear Strength, MPa 790
310 to 370
Tensile Strength: Ultimate (UTS), MPa 1250
500 to 590
Tensile Strength: Yield (Proof), MPa 690
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 330
260
Maximum Temperature: Mechanical, °C 990
480
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
4.1
Density, g/cm3 8.5
7.9
Embodied Carbon, kg CO2/kg material 11
1.8
Embodied Energy, MJ/kg 150
23
Embodied Water, L/kg 330
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1170
140 to 320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 41
18 to 21
Strength to Weight: Bending, points 30
18 to 20
Thermal Shock Resistance, points 35
14 to 17

Alloy Composition

Aluminum (Al), % 0.75 to 1.3
0
Boron (B), % 0.0030 to 0.010
0
Carbon (C), % 0.1 to 0.2
0.050 to 0.15
Chromium (Cr), % 18 to 20
2.8 to 3.3
Cobalt (Co), % 9.0 to 11
0
Iron (Fe), % 0 to 5.0
94.4 to 96
Manganese (Mn), % 0 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 9.0 to 10.5
0.9 to 1.1
Nickel (Ni), % 48.3 to 60.9
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.025
Titanium (Ti), % 2.3 to 2.8
0