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ASTM A229 Spring Steel vs. R60706 Alloy

ASTM A229 spring steel belongs to the iron alloys classification, while R60706 alloy belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is R60706 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
98
Elongation at Break, % 14
16
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
37
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
580
Tensile Strength: Yield (Proof), MPa 1100 to 1230
390

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 50
17
Thermal Expansion, µm/m-K 12
6.3

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
82
Resilience: Unit (Modulus of Resilience), kJ/m3 3260 to 4080
760
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 60 to 67
24
Strength to Weight: Bending, points 40 to 43
23
Thermal Diffusivity, mm2/s 14
9.5
Thermal Shock Resistance, points 54 to 60
67

Alloy Composition

Carbon (C), % 0.55 to 0.85
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), % 97.5 to 99
0 to 0.2
Manganese (Mn), % 0.3 to 1.2
0
Niobium (Nb), % 0
2.0 to 3.0
Nitrogen (N), % 0
0 to 0.025
Oxygen (O), % 0
0 to 0.16
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.050
0
Zirconium (Zr), % 0
91 to 98