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SAE-AISI 9254 Steel vs. EN 1.1221 Steel

Both SAE-AISI 9254 steel and EN 1.1221 steel 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 SAE-AISI 9254 steel and the bottom bar is EN 1.1221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
210 to 250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
10 to 21
Fatigue Strength, MPa 280
240 to 340
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Shear Strength, MPa 410
450 to 520
Tensile Strength: Ultimate (UTS), MPa 660
730 to 870
Tensile Strength: Yield (Proof), MPa 410
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 46
48
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5
Embodied Energy, MJ/kg 20
19
Embodied Water, L/kg 49
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
67 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 450
410 to 800
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 24
26 to 31
Strength to Weight: Bending, points 22
23 to 26
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 20
23 to 28

Alloy Composition

Carbon (C), % 0.51 to 0.59
0.57 to 0.65
Chromium (Cr), % 0.6 to 0.8
0 to 0.4
Iron (Fe), % 96.1 to 97.1
97.1 to 98.8
Manganese (Mn), % 0.6 to 0.8
0.6 to 0.9
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 1.2 to 1.6
0 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.035