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SAE-AISI 5150 Steel vs. ASTM A369 Grade FP1

Both SAE-AISI 5150 steel and ASTM A369 grade FP1 are iron alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 5150 steel and the bottom bar is ASTM A369 grade FP1.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
130
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
20
Fatigue Strength, MPa 240
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 360
270
Tensile Strength: Ultimate (UTS), MPa 580
430
Tensile Strength: Yield (Proof), MPa 350
240

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 49
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.4
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 49
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
75
Resilience: Unit (Modulus of Resilience), kJ/m3 320
150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20
15
Strength to Weight: Bending, points 20
16
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 17
13

Alloy Composition

Carbon (C), % 0.48 to 0.53
0.1 to 0.2
Chromium (Cr), % 0.7 to 0.9
0
Iron (Fe), % 97.2 to 98
97.8 to 99.06
Manganese (Mn), % 0.7 to 0.9
0.3 to 0.8
Molybdenum (Mo), % 0
0.44 to 0.65
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.1 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.025