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ASTM A369 Grade FP9 vs. EN 1.6580 Steel

Both ASTM A369 grade FP9 and EN 1.6580 steel are iron alloys. They have a moderately high 92% 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 1.6580 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
220 to 350
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
11 to 19
Fatigue Strength, MPa 160
310 to 610
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 300
450 to 700
Tensile Strength: Ultimate (UTS), MPa 470
720 to 1170
Tensile Strength: Yield (Proof), MPa 240
460 to 990

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 600
450
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
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 10
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
4.3
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.0
1.8
Embodied Energy, MJ/kg 28
23
Embodied Water, L/kg 87
59

Common Calculations

PREN (Pitting Resistance) 12
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140
560 to 2590
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
26 to 41
Strength to Weight: Bending, points 17
23 to 31
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 13
21 to 34

Alloy Composition

Carbon (C), % 0 to 0.15
0.26 to 0.34
Chromium (Cr), % 8.0 to 10
1.8 to 2.2
Iron (Fe), % 87.1 to 90.3
93.7 to 95.5
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.3 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.5 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035