MakeItFrom.com
Menu (ESC)

SAE-AISI 4340M Steel vs. ASTM A369 Grade FP9

Both SAE-AISI 4340M steel and ASTM A369 grade FP9 are iron alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4340M steel and the bottom bar is ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 710
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.0
20
Fatigue Strength, MPa 690
160
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
75
Shear Strength, MPa 1360
300
Tensile Strength: Ultimate (UTS), MPa 2340
470
Tensile Strength: Yield (Proof), MPa 1240
240

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Mechanical, °C 430
600
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 38
26
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
10

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
2.0
Embodied Energy, MJ/kg 26
28
Embodied Water, L/kg 55
87

Common Calculations

PREN (Pitting Resistance) 2.2
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
80
Resilience: Unit (Modulus of Resilience), kJ/m3 4120
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 84
17
Strength to Weight: Bending, points 51
17
Thermal Diffusivity, mm2/s 10
6.9
Thermal Shock Resistance, points 70
13

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.15
Chromium (Cr), % 0.7 to 1.0
8.0 to 10
Iron (Fe), % 93.3 to 94.8
87.1 to 90.3
Manganese (Mn), % 0.65 to 0.9
0.3 to 0.6
Molybdenum (Mo), % 0.35 to 0.45
0.9 to 1.1
Nickel (Ni), % 1.7 to 2.0
0
Phosphorus (P), % 0 to 0.012
0 to 0.030
Silicon (Si), % 1.5 to 1.8
0.5 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030
Vanadium (V), % 0.050 to 0.1
0