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SAE-AISI 4320 Steel vs. EN 1.0225 Steel

Both SAE-AISI 4320 steel and EN 1.0225 steel are iron alloys. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI 4320 steel and the bottom bar is EN 1.0225 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 240
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21 to 29
6.7 to 24
Fatigue Strength, MPa 320
170 to 220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 500
280 to 290
Tensile Strength: Ultimate (UTS), MPa 570 to 790
440 to 500
Tensile Strength: Yield (Proof), MPa 430 to 460
230 to 380

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
400
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 46
52
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.4
Embodied Energy, MJ/kg 22
18
Embodied Water, L/kg 52
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
31 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 560
140 to 390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 28
16 to 18
Strength to Weight: Bending, points 19 to 24
16 to 18
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 19 to 27
14 to 16

Alloy Composition

Carbon (C), % 0.17 to 0.22
0 to 0.21
Chromium (Cr), % 0.4 to 0.6
0
Iron (Fe), % 95.8 to 97
98 to 100
Manganese (Mn), % 0.45 to 0.65
0 to 1.4
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 1.7 to 2.0
0
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.045

Comparable Variants