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ASTM A229 Spring Steel vs. SAE-AISI L2 Steel

Both ASTM A229 spring steel and SAE-AISI L2 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is SAE-AISI L2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
72
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
590 to 1960

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
44
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.9
Embodied Energy, MJ/kg 19
27
Embodied Water, L/kg 46
51

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60 to 67
21 to 70
Strength to Weight: Bending, points 40 to 43
20 to 45
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 54 to 60
19 to 65

Alloy Composition

Carbon (C), % 0.55 to 0.85
0.45 to 1.0
Chromium (Cr), % 0
0.7 to 1.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 97.5 to 99
95.5 to 98.7
Manganese (Mn), % 0.3 to 1.2
0.1 to 0.9
Molybdenum (Mo), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.050
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3

Comparable Variants