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SAE-AISI 1021 Steel vs. Nickel 685

SAE-AISI 1021 steel belongs to the iron alloys classification, while nickel 685 belongs to the nickel alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1021 steel and the bottom bar is nickel 685.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
350
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
17
Fatigue Strength, MPa 190 to 300
470
Poisson's Ratio 0.29
0.29
Reduction in Area, % 46 to 54
20
Shear Modulus, GPa 73
77
Shear Strength, MPa 310 to 320
770
Tensile Strength: Ultimate (UTS), MPa 480 to 530
1250
Tensile Strength: Yield (Proof), MPa 260 to 450
850

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 400
1000
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1330
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 52
13
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
75
Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 1.4
10
Embodied Energy, MJ/kg 18
140
Embodied Water, L/kg 46
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
1820
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 17 to 19
42
Strength to Weight: Bending, points 17 to 18
31
Thermal Diffusivity, mm2/s 14
3.3
Thermal Shock Resistance, points 15 to 17
37

Alloy Composition

Aluminum (Al), % 0
1.2 to 1.6
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0.18 to 0.23
0.030 to 0.1
Chromium (Cr), % 0
18 to 21
Cobalt (Co), % 0
12 to 15
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 98.8 to 99.22
0 to 2.0
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 5.0
Nickel (Ni), % 0
49.6 to 62.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030
Titanium (Ti), % 0
2.8 to 3.3
Zinc (Zn), % 0
0.020 to 0.12