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ASTM A229 Spring Steel vs. Grade FDCrV Steel

Both ASTM A229 spring steel and grade FDCrV steel are iron alloys. Their average alloy composition is basically identical. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM A229 spring steel and the bottom bar is grade FDCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 490 to 550
540
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
80
Tensile Strength: Ultimate (UTS), MPa 1690 to 1890
1800

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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
48
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.9
Embodied Energy, MJ/kg 19
26
Embodied Water, L/kg 46
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60 to 67
64
Strength to Weight: Bending, points 40 to 43
42
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 54 to 60
53

Alloy Composition

Carbon (C), % 0.55 to 0.85
0.62 to 0.72
Chromium (Cr), % 0
0.4 to 0.6
Copper (Cu), % 0
0 to 0.12
Iron (Fe), % 97.5 to 99
97.8 to 98.8
Manganese (Mn), % 0.3 to 1.2
0.5 to 0.9
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0.15 to 0.3
Sulfur (S), % 0 to 0.050
0 to 0.025
Vanadium (V), % 0
0.15 to 0.25