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ASTM A227 Spring Steel vs. R60705 Alloy

ASTM A227 spring steel belongs to the iron alloys classification, while R60705 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 A227 spring 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, % 12
18
Fatigue Strength, MPa 900 to 1160
290
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
37
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
540
Tensile Strength: Yield (Proof), MPa 1430 to 1850
430

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 52
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 260
90
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 61 to 79
22
Strength to Weight: Bending, points 41 to 48
22
Thermal Diffusivity, mm2/s 14
9.5
Thermal Shock Resistance, points 55 to 71
63

Alloy Composition

Carbon (C), % 0.45 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), % 97.4 to 99.1
0 to 0.2
Manganese (Mn), % 0.3 to 1.3
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 0.040
0
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.050
0
Zirconium (Zr), % 0
91 to 98