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C69430 Brass vs. ASTM A229 Spring Steel

C69430 brass belongs to the copper alloys classification, while ASTM A229 spring steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is C69430 brass and the bottom bar is ASTM A229 spring steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Elongation at Break, % 17
14
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 42
72
Shear Strength, MPa 350
1020 to 1140
Tensile Strength: Ultimate (UTS), MPa 570
1690 to 1890
Tensile Strength: Yield (Proof), MPa 280
1100 to 1230

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 920
1450
Melting Onset (Solidus), °C 820
1410
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 26
50
Thermal Expansion, µm/m-K 18
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 6.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 27
1.8
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.4
Embodied Energy, MJ/kg 44
19
Embodied Water, L/kg 300
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 340
3260 to 4080
Stiffness to Weight: Axial, points 7.4
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 19
60 to 67
Strength to Weight: Bending, points 18
40 to 43
Thermal Diffusivity, mm2/s 7.7
14
Thermal Shock Resistance, points 20
54 to 60

Alloy Composition

Arsenic (As), % 0.030 to 0.060
0
Carbon (C), % 0
0.55 to 0.85
Copper (Cu), % 80 to 83
0
Iron (Fe), % 0 to 0.2
97.5 to 99
Lead (Pb), % 0 to 0.3
0
Manganese (Mn), % 0
0.3 to 1.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 3.5 to 4.5
0.15 to 0.35
Sulfur (S), % 0
0 to 0.050
Zinc (Zn), % 11.4 to 16.5
0
Residuals, % 0 to 0.5
0