Grade FDC Steel vs. C69700 Brass

Grade FDC steel belongs to the iron alloys classification, while C69700 brass belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is grade FDC steel and the bottom bar is C69700 brass.

Grade FDC Spring Steel UNS C69700 Leaded Silicon Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		190
Elastic (Young's, Tensile) Modulus, GPa		110

Poisson's Ratio		0.29
Poisson's Ratio		0.32

Shear Modulus, GPa		80
Shear Modulus, GPa		41

Tensile Strength: Ultimate (UTS), MPa		1680
Tensile Strength: Ultimate (UTS), MPa		470

Thermal Properties

Latent Heat of Fusion, J/g		250
Latent Heat of Fusion, J/g		240

Maximum Temperature: Mechanical, °C		400
Maximum Temperature: Mechanical, °C		160

Melting Completion (Liquidus), °C		1450
Melting Completion (Liquidus), °C		930

Melting Onset (Solidus), °C		1410
Melting Onset (Solidus), °C		880

Specific Heat Capacity, J/kg-K		470
Specific Heat Capacity, J/kg-K		400

Thermal Conductivity, W/m-K		51
Thermal Conductivity, W/m-K		43

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		19

Otherwise Unclassified Properties

Base Metal Price, % relative		1.9
Base Metal Price, % relative		26

Density, g/cm³		7.8
Density, g/cm³		8.3

Embodied Carbon, kg CO₂/kg material		1.4
Embodied Carbon, kg CO₂/kg material		2.7

Embodied Energy, MJ/kg		19
Embodied Energy, MJ/kg		44

Embodied Water, L/kg		47
Embodied Water, L/kg		310

Common Calculations

Stiffness to Weight: Axial, points		13
Stiffness to Weight: Axial, points		7.3

Stiffness to Weight: Bending, points		24
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		60
Strength to Weight: Axial, points		16

Strength to Weight: Bending, points		40
Strength to Weight: Bending, points		16

Thermal Diffusivity, mm²/s		14
Thermal Diffusivity, mm²/s		13

Thermal Shock Resistance, points		50
Thermal Shock Resistance, points		16

Alloy Composition

Carbon (C), %		0.6 to 0.75
Carbon (C), %		0

Chromium (Cr), %		0 to 0.3
Chromium (Cr), %		0

Copper (Cu), %		0 to 0.12
Copper (Cu), %		75 to 80

Iron (Fe), %		98 to 99.4
Iron (Fe), %		0 to 0.2

Lead (Pb), %		0
Lead (Pb), %		0.5 to 1.5

Manganese (Mn), %		0.5 to 1.2
Manganese (Mn), %		0 to 0.4

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0

Silicon (Si), %		0.1 to 0.35
Silicon (Si), %		2.5 to 3.5

Sulfur (S), %		0 to 0.025
Sulfur (S), %		0

Zinc (Zn), %		0
Zinc (Zn), %		13.9 to 22

Residuals, %		0
Residuals, %		0 to 0.5