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ASTM A387 Grade 91 Class 2 vs. C32000 Brass

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while C32000 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 91 class 2 and the bottom bar is C32000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
6.8 to 29
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
41
Shear Strength, MPa 420
180 to 280
Tensile Strength: Ultimate (UTS), MPa 670
270 to 470
Tensile Strength: Yield (Proof), MPa 470
78 to 390

Thermal Properties

Latent Heat of Fusion, J/g 270
190
Maximum Temperature: Mechanical, °C 600
170
Melting Completion (Liquidus), °C 1460
1020
Melting Onset (Solidus), °C 1420
990
Specific Heat Capacity, J/kg-K 470
380
Thermal Conductivity, W/m-K 26
160
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
36
Electrical Conductivity: Equal Weight (Specific), % IACS 10
37

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
28
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 2.6
2.6
Embodied Energy, MJ/kg 37
42
Embodied Water, L/kg 88
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
30 to 59
Resilience: Unit (Modulus of Resilience), kJ/m3 580
28 to 680
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 24
8.8 to 15
Strength to Weight: Bending, points 22
11 to 16
Thermal Diffusivity, mm2/s 6.9
47
Thermal Shock Resistance, points 19
9.5 to 16

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
83.5 to 86.5
Iron (Fe), % 87.3 to 90.3
0 to 0.1
Lead (Pb), % 0
1.5 to 2.2
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.25
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.2 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
10.6 to 15
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.4