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ASTM A369 Grade FP21 vs. SAE-AISI 52100 Steel

Both ASTM A369 grade FP21 and SAE-AISI 52100 steel are iron alloys. They have a very high 97% 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 ASTM A369 grade FP21 and the bottom bar is SAE-AISI 52100 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
10 to 20
Fatigue Strength, MPa 160
250 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Shear Strength, MPa 300
370 to 420
Tensile Strength: Ultimate (UTS), MPa 470
590 to 2010
Tensile Strength: Yield (Proof), MPa 240
360 to 560

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 470
430
Melting Completion (Liquidus), °C 1470
1450
Melting Onset (Solidus), °C 1430
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
47
Thermal Expansion, µm/m-K 13
12 to 13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.5
Embodied Energy, MJ/kg 23
20
Embodied Water, L/kg 61
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
54 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 150
350 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
21 to 72
Strength to Weight: Bending, points 17
20 to 45
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 14
19 to 61

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.93 to 1.1
Chromium (Cr), % 2.7 to 3.4
1.4 to 1.6
Iron (Fe), % 94.3 to 96.2
96.5 to 97.3
Manganese (Mn), % 0.3 to 0.6
0.25 to 0.45
Molybdenum (Mo), % 0.8 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.015