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ASTM A387 Grade 91 Class 2 vs. CC751S Brass

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while CC751S 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 CC751S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
130
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
5.6
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 75
40
Tensile Strength: Ultimate (UTS), MPa 670
450
Tensile Strength: Yield (Proof), MPa 470
320

Thermal Properties

Latent Heat of Fusion, J/g 270
190
Maximum Temperature: Mechanical, °C 600
130
Melting Completion (Liquidus), °C 1460
850
Melting Onset (Solidus), °C 1420
810
Specific Heat Capacity, J/kg-K 470
390
Thermal Conductivity, W/m-K 26
110
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
25
Electrical Conductivity: Equal Weight (Specific), % IACS 10
28

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
24
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 2.6
2.8
Embodied Energy, MJ/kg 37
46
Embodied Water, L/kg 88
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
23
Resilience: Unit (Modulus of Resilience), kJ/m3 580
480
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 24
15
Strength to Weight: Bending, points 22
16
Thermal Diffusivity, mm2/s 6.9
35
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0 to 0.020
0 to 0.1
Antimony (Sb), % 0
0 to 0.5
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0
Copper (Cu), % 0
62.7 to 66
Iron (Fe), % 87.3 to 90.3
0.25 to 0.5
Lead (Pb), % 0
0.8 to 2.2
Manganese (Mn), % 0.3 to 0.6
0 to 0.15
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0 to 0.8
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
0.65 to 1.1
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.8
Titanium (Ti), % 0 to 0.010
0
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
27.9 to 35.6
Zirconium (Zr), % 0 to 0.010
0