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R60706 Alloy vs. ASTM A227 Spring Steel

R60706 alloy belongs to the otherwise unclassified metals classification, while ASTM A227 spring steel belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R60706 alloy and the bottom bar is ASTM A227 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 16
12
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 37
72
Tensile Strength: Ultimate (UTS), MPa 580
1720 to 2220
Tensile Strength: Yield (Proof), MPa 390
1430 to 1850

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 17
52
Thermal Expansion, µm/m-K 6.3
12

Otherwise Unclassified Properties

Density, g/cm3 6.7
7.8
Embodied Water, L/kg 450
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 82
200 to 260
Stiffness to Weight: Axial, points 8.1
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 24
61 to 79
Strength to Weight: Bending, points 23
41 to 48
Thermal Diffusivity, mm2/s 9.5
14
Thermal Shock Resistance, points 67
55 to 71

Alloy Composition

Carbon (C), % 0 to 0.050
0.45 to 0.85
Chromium (Cr), % 0 to 0.2
0
Hafnium (Hf), % 0 to 4.5
0
Hydrogen (H), % 0 to 0.0050
0
Iron (Fe), % 0 to 0.2
97.4 to 99.1
Manganese (Mn), % 0
0.3 to 1.3
Niobium (Nb), % 2.0 to 3.0
0
Nitrogen (N), % 0 to 0.025
0
Oxygen (O), % 0 to 0.16
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Zirconium (Zr), % 91 to 98
0