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SAE-AISI 1021 Steel vs. SAE-AISI 8630 Steel

Both SAE-AISI 1021 steel and SAE-AISI 8630 steel are iron alloys. They have a very high 98% of their average alloy composition in common. 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 SAE-AISI 1021 steel and the bottom bar is SAE-AISI 8630 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
160 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
12 to 24
Fatigue Strength, MPa 190 to 300
260 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 320
340 to 410
Tensile Strength: Ultimate (UTS), MPa 480 to 530
540 to 680
Tensile Strength: Yield (Proof), MPa 260 to 450
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
39
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.6
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
20
Embodied Water, L/kg 46
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
340 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 19
19 to 24
Strength to Weight: Bending, points 17 to 18
19 to 22
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 15 to 17
18 to 23

Alloy Composition

Carbon (C), % 0.18 to 0.23
0.28 to 0.33
Chromium (Cr), % 0
0.4 to 0.6
Iron (Fe), % 98.8 to 99.22
96.8 to 97.9
Manganese (Mn), % 0.6 to 0.9
0.7 to 0.9
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.050
0 to 0.040

Comparable Variants