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ASTM A232 Spring Steel vs. AWS BAg-34

ASTM A232 spring steel belongs to the iron alloys classification, while AWS BAg-34 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is ASTM A232 spring steel and the bottom bar is AWS BAg-34.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
89
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
34
Tensile Strength: Ultimate (UTS), MPa 1790
170

Thermal Properties

Latent Heat of Fusion, J/g 250
140
Melting Completion (Liquidus), °C 1460
720
Melting Onset (Solidus), °C 1410
650
Specific Heat Capacity, J/kg-K 470
330
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 2.0
38
Embodied Energy, MJ/kg 28
600

Common Calculations

Stiffness to Weight: Axial, points 13
5.6
Stiffness to Weight: Bending, points 24
17
Strength to Weight: Axial, points 64
5.4
Strength to Weight: Bending, points 42
7.7
Thermal Shock Resistance, points 53
6.5

Alloy Composition

Carbon (C), % 0.48 to 0.53
0
Chromium (Cr), % 0.8 to 1.1
0
Copper (Cu), % 0
31 to 33
Iron (Fe), % 96.8 to 97.7
0
Manganese (Mn), % 0.7 to 0.9
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.15 to 0.35
0
Silver (Ag), % 0
37 to 39
Sulfur (S), % 0 to 0.035
0
Tin (Sn), % 0
1.5 to 2.5
Vanadium (V), % 0.15 to 0.3
0
Zinc (Zn), % 0
26 to 30
Residuals, % 0
0 to 0.15