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ASTM A387 Grade 21 Steel vs. CC765S Brass

ASTM A387 grade 21 steel belongs to the iron alloys classification, while CC765S 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 21 steel and the bottom bar is CC765S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 180
130
Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21
21
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 74
42
Tensile Strength: Ultimate (UTS), MPa 500 to 590
540
Tensile Strength: Yield (Proof), MPa 230 to 350
220

Thermal Properties

Latent Heat of Fusion, J/g 260
180
Maximum Temperature: Mechanical, °C 480
140
Melting Completion (Liquidus), °C 1470
860
Melting Onset (Solidus), °C 1430
820
Specific Heat Capacity, J/kg-K 470
400
Thermal Conductivity, W/m-K 41
91
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
30
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
34

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
24
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
3.0
Embodied Energy, MJ/kg 23
51
Embodied Water, L/kg 62
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
90
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
220
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 18 to 21
19
Strength to Weight: Bending, points 18 to 20
18
Thermal Diffusivity, mm2/s 11
28
Thermal Shock Resistance, points 14 to 17
17

Alloy Composition

Aluminum (Al), % 0
0.5 to 2.5
Antimony (Sb), % 0
0 to 0.080
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
51 to 65
Iron (Fe), % 94.4 to 96
0.5 to 2.0
Lead (Pb), % 0
0 to 0.5
Manganese (Mn), % 0.3 to 0.6
0.3 to 3.0
Molybdenum (Mo), % 0.9 to 1.1
0
Nickel (Ni), % 0
0 to 6.0
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0 to 0.025
0
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0
19.8 to 47.7