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ASTM A387 Grade 21 Steel vs. Nickel 690

ASTM A387 grade 21 steel belongs to the iron alloys classification, while nickel 690 belongs to the nickel alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 690.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
90
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
3.4 to 34
Fatigue Strength, MPa 160 to 250
180 to 300
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
79
Shear Strength, MPa 310 to 370
420 to 570
Tensile Strength: Ultimate (UTS), MPa 500 to 590
640 to 990
Tensile Strength: Yield (Proof), MPa 230 to 350
250 to 760

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Maximum Temperature: Mechanical, °C 480
1010
Melting Completion (Liquidus), °C 1470
1380
Melting Onset (Solidus), °C 1430
1340
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
14
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
1.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
1.6

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
8.2
Embodied Energy, MJ/kg 23
120
Embodied Water, L/kg 62
290

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
31 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
160 to 1440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18 to 21
21 to 33
Strength to Weight: Bending, points 18 to 20
20 to 27
Thermal Diffusivity, mm2/s 11
3.5
Thermal Shock Resistance, points 14 to 17
16 to 25

Alloy Composition

Carbon (C), % 0.050 to 0.15
0 to 0.050
Chromium (Cr), % 2.8 to 3.3
27 to 31
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 94.4 to 96
7.0 to 11
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
58 to 66
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.015

Comparable Variants