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EN 1.1221 Steel vs. ASTM A369 Grade FPB

Both EN 1.1221 steel and ASTM A369 grade FPB are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.1221 steel and the bottom bar is ASTM A369 grade FPB.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 250
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 10 to 21
19
Fatigue Strength, MPa 240 to 340
180
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 450 to 520
290
Tensile Strength: Ultimate (UTS), MPa 730 to 870
470
Tensile Strength: Yield (Proof), MPa 390 to 550
270

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 47
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 67 to 130
78
Resilience: Unit (Modulus of Resilience), kJ/m3 410 to 800
190
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26 to 31
17
Strength to Weight: Bending, points 23 to 26
17
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 23 to 28
15

Alloy Composition

Carbon (C), % 0.57 to 0.65
0 to 0.3
Chromium (Cr), % 0 to 0.4
0
Iron (Fe), % 97.1 to 98.8
98.1 to 99.61
Manganese (Mn), % 0.6 to 0.9
0.29 to 1.1
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0.1 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.035