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EN 1.6580 Steel vs. ASTM A369 Grade FP9

Both EN 1.6580 steel and ASTM A369 grade FP9 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 EN 1.6580 steel and the bottom bar is ASTM A369 grade FP9.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 450
600
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
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 8.9
10

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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