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SAE-AISI 9255 Steel vs. R60705 Alloy

SAE-AISI 9255 steel belongs to the iron alloys classification, while R60705 alloy belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 9255 steel and the bottom bar is R60705 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 21
18
Fatigue Strength, MPa 270
290
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
37
Tensile Strength: Ultimate (UTS), MPa 680
540
Tensile Strength: Yield (Proof), MPa 390
430

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Specific Heat Capacity, J/kg-K 480
270
Thermal Conductivity, W/m-K 46
17
Thermal Expansion, µm/m-K 13
6.3

Otherwise Unclassified Properties

Density, g/cm3 7.7
6.7
Embodied Water, L/kg 46
450

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
90
Resilience: Unit (Modulus of Resilience), kJ/m3 400
950
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24
22
Strength to Weight: Bending, points 22
22
Thermal Diffusivity, mm2/s 13
9.5
Thermal Shock Resistance, points 21
63

Alloy Composition

Carbon (C), % 0.51 to 0.59
0 to 0.050
Chromium (Cr), % 0
0 to 0.2
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 96.2 to 97
0 to 0.2
Manganese (Mn), % 0.7 to 1.0
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 1.8 to 2.2
0
Sulfur (S), % 0 to 0.040
0
Zirconium (Zr), % 0
91 to 98