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SAE-AISI 1021 Steel vs. ASTM A369 Grade FP5

Both SAE-AISI 1021 steel and ASTM A369 grade FP5 are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 31 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 ASTM A369 grade FP5.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
20
Fatigue Strength, MPa 190 to 300
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 310 to 320
300
Tensile Strength: Ultimate (UTS), MPa 480 to 530
470
Tensile Strength: Yield (Proof), MPa 260 to 450
240

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 400
510
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
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
4.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 18
23
Embodied Water, L/kg 46
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
80
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 19
17
Strength to Weight: Bending, points 17 to 18
17
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 15 to 17
13

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.15
Chromium (Cr), % 0
4.0 to 6.0
Iron (Fe), % 98.8 to 99.22
92.1 to 95.3
Manganese (Mn), % 0.6 to 0.9
0.3 to 0.6
Molybdenum (Mo), % 0
0.45 to 0.65
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.025