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SAE-AISI 9254 Steel vs. ACI-ASTM CK35MN Steel

Both SAE-AISI 9254 steel and ACI-ASTM CK35MN steel are iron alloys. They have 50% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9254 steel and the bottom bar is ACI-ASTM CK35MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
190
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 20
40
Fatigue Strength, MPa 280
270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
81
Tensile Strength: Ultimate (UTS), MPa 660
650
Tensile Strength: Yield (Proof), MPa 410
310

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Mechanical, °C 410
1100
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
12
Thermal Expansion, µm/m-K 13
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
31
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 1.5
5.9
Embodied Energy, MJ/kg 20
81
Embodied Water, L/kg 49
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
210
Resilience: Unit (Modulus of Resilience), kJ/m3 450
240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 12
3.3
Thermal Shock Resistance, points 20
14

Alloy Composition

Carbon (C), % 0.51 to 0.59
0 to 0.035
Chromium (Cr), % 0.6 to 0.8
22 to 24
Copper (Cu), % 0
0 to 0.4
Iron (Fe), % 96.1 to 97.1
43.4 to 51.8
Manganese (Mn), % 0.6 to 0.8
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 6.8
Nickel (Ni), % 0
20 to 22
Nitrogen (N), % 0
0.21 to 0.32
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 1.2 to 1.6
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020