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ASTM A227 Spring Steel vs. R05240 Alloy

ASTM A227 spring steel belongs to the iron alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is ASTM A227 spring steel and the bottom bar is R05240 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
150
Elongation at Break, % 12
25
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 72
57
Tensile Strength: Ultimate (UTS), MPa 1720 to 2220
270
Tensile Strength: Yield (Proof), MPa 1430 to 1850
170

Thermal Properties

Latent Heat of Fusion, J/g 250
210
Specific Heat Capacity, J/kg-K 470
190
Thermal Expansion, µm/m-K 12
6.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
14
Embodied Water, L/kg 46
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 260
59
Stiffness to Weight: Axial, points 13
6.3
Stiffness to Weight: Bending, points 24
13
Strength to Weight: Axial, points 61 to 79
5.4
Strength to Weight: Bending, points 41 to 48
6.8
Thermal Shock Resistance, points 55 to 71
18

Alloy Composition

Carbon (C), % 0.45 to 0.85
0 to 0.010
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 97.4 to 99.1
0 to 0.010
Manganese (Mn), % 0.3 to 1.3
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
35 to 42
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.15 to 0.35
0 to 0.0050
Sulfur (S), % 0 to 0.050
0
Tantalum (Ta), % 0
57.9 to 65
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0 to 0.050