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ASTM A227 Spring Steel vs. R60704 Alloy

ASTM A227 spring steel belongs to the iron alloys classification, while R60704 alloy belongs to the otherwise unclassified metals. 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 ASTM A227 spring steel and the bottom bar is R60704 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
97
Elongation at Break, % 12
16
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 72
36
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
470
Tensile Strength: Yield (Proof), MPa 1430 to 1850
270

Thermal Properties

Latent Heat of Fusion, J/g 250
240
Specific Heat Capacity, J/kg-K 470
270
Thermal Conductivity, W/m-K 52
22
Thermal Expansion, µm/m-K 12
6.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
6.7
Embodied Water, L/kg 46
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
64
Stiffness to Weight: Axial, points 13
8.1
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 61 to 79
20
Strength to Weight: Bending, points 41 to 48
20
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 55 to 71
58

Alloy Composition

Carbon (C), % 0.45 to 0.85
0 to 0.050
Chromium (Cr), % 0
0.2 to 0.4
Hafnium (Hf), % 0
0 to 4.5
Hydrogen (H), % 0
0 to 0.0050
Iron (Fe), % 97.4 to 99.1
0.2 to 0.4
Manganese (Mn), % 0.3 to 1.3
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
Tin (Sn), % 0
1.0 to 2.0
Zirconium (Zr), % 0
93 to 98.8