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ASTM A369 Grade FP12 vs. EN 1.7711 Steel

Both ASTM A369 grade FP12 and EN 1.7711 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is ASTM A369 grade FP12 and the bottom bar is EN 1.7711 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
210 to 280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
16 to 22
Fatigue Strength, MPa 170
290 to 520
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 300
440 to 570
Tensile Strength: Ultimate (UTS), MPa 470
690 to 930
Tensile Strength: Yield (Proof), MPa 250
400 to 800

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
430
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
33
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
3.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.3
Embodied Energy, MJ/kg 21
32
Embodied Water, L/kg 52
54

Common Calculations

PREN (Pitting Resistance) 2.8
2.9
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
130 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 160
430 to 1690
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
24 to 33
Strength to Weight: Bending, points 17
22 to 27
Thermal Diffusivity, mm2/s 12
8.9
Thermal Shock Resistance, points 14
24 to 32

Alloy Composition

Aluminum (Al), % 0
0 to 0.015
Carbon (C), % 0.050 to 0.15
0.36 to 0.44
Chromium (Cr), % 0.8 to 1.3
0.9 to 1.2
Iron (Fe), % 96.8 to 98.4
96 to 97.5
Manganese (Mn), % 0.3 to 0.61
0.45 to 0.85
Molybdenum (Mo), % 0.44 to 0.65
0.5 to 0.65
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35