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ASTM A387 Grade 91 Class 2 vs. C69700 Brass

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while C69700 brass belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, 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 C69700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
25
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
41
Shear Strength, MPa 420
300
Tensile Strength: Ultimate (UTS), MPa 670
470
Tensile Strength: Yield (Proof), MPa 470
230

Thermal Properties

Latent Heat of Fusion, J/g 270
240
Maximum Temperature: Mechanical, °C 600
160
Melting Completion (Liquidus), °C 1460
930
Melting Onset (Solidus), °C 1420
880
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 26
43
Thermal Expansion, µm/m-K 13
19

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
26
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 2.6
2.7
Embodied Energy, MJ/kg 37
44
Embodied Water, L/kg 88
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
99
Resilience: Unit (Modulus of Resilience), kJ/m3 580
250
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 24
16
Strength to Weight: Bending, points 22
16
Thermal Diffusivity, mm2/s 6.9
13
Thermal Shock Resistance, points 19
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
75 to 80
Iron (Fe), % 87.3 to 90.3
0 to 0.2
Lead (Pb), % 0
0.5 to 1.5
Manganese (Mn), % 0.3 to 0.6
0 to 0.4
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
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
2.5 to 3.5
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
13.9 to 22
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.5