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EN 1.7233 Steel vs. ASTM A369 Grade FP21

Both EN 1.7233 steel and ASTM A369 grade FP21 are iron alloys. They have a very high 98% 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 FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 290
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18 to 23
20
Fatigue Strength, MPa 270 to 530
160
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 450 to 590
300
Tensile Strength: Ultimate (UTS), MPa 700 to 960
470
Tensile Strength: Yield (Proof), MPa 380 to 780
240

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 430
470
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
4.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.8
Embodied Energy, MJ/kg 21
23
Embodied Water, L/kg 53
61

Common Calculations

PREN (Pitting Resistance) 3.3
6.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 200
80
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 1630
150
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 34
17
Strength to Weight: Bending, points 22 to 28
17
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 21 to 28
14

Alloy Composition

Carbon (C), % 0.39 to 0.45
0.050 to 0.15
Chromium (Cr), % 1.2 to 1.5
2.7 to 3.4
Iron (Fe), % 96.2 to 97.5
94.3 to 96.2
Manganese (Mn), % 0.4 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0.5 to 0.7
0.8 to 1.1
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.035
0 to 0.025