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EN 1.7233 Steel vs. ASTM A369 Grade FP91

Both EN 1.7233 steel and ASTM A369 grade FP91 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 1.7233 steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 290
200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18 to 23
19
Fatigue Strength, MPa 270 to 530
320
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Shear Strength, MPa 450 to 590
410
Tensile Strength: Ultimate (UTS), MPa 700 to 960
670
Tensile Strength: Yield (Proof), MPa 380 to 780
460

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
10

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.6
Embodied Energy, MJ/kg 21
37
Embodied Water, L/kg 53
88

Common Calculations

PREN (Pitting Resistance) 3.3
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 200
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1630
560
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 34
24
Strength to Weight: Bending, points 22 to 28
22
Thermal Diffusivity, mm2/s 11
6.9
Thermal Shock Resistance, points 21 to 28
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0.39 to 0.45
0.080 to 0.12
Chromium (Cr), % 1.2 to 1.5
8.0 to 9.5
Iron (Fe), % 96.2 to 97.5
87.3 to 90.3
Manganese (Mn), % 0.4 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0.5 to 0.7
0.85 to 1.1
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0.2 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010