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ASTM A369 Grade FP9 vs. EN 1.7233 Steel

Both ASTM A369 grade FP9 and EN 1.7233 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is ASTM A369 grade FP9 and the bottom bar is EN 1.7233 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
210 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
18 to 23
Fatigue Strength, MPa 160
270 to 530
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 300
450 to 590
Tensile Strength: Ultimate (UTS), MPa 470
700 to 960
Tensile Strength: Yield (Proof), MPa 240
380 to 780

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
430
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
3.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.6
Embodied Energy, MJ/kg 28
21
Embodied Water, L/kg 87
53

Common Calculations

PREN (Pitting Resistance) 12
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
110 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 140
380 to 1630
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
25 to 34
Strength to Weight: Bending, points 17
22 to 28
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 13
21 to 28

Alloy Composition

Carbon (C), % 0 to 0.15
0.39 to 0.45
Chromium (Cr), % 8.0 to 10
1.2 to 1.5
Iron (Fe), % 87.1 to 90.3
96.2 to 97.5
Manganese (Mn), % 0.3 to 0.6
0.4 to 0.7
Molybdenum (Mo), % 0.9 to 1.1
0.5 to 0.7
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.5 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035