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ASTM A387 Grade 21 Steel vs. C67600 Bronze

ASTM A387 grade 21 steel belongs to the iron alloys classification, while C67600 bronze 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 C67600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
100
Elongation at Break, % 21
13 to 33
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 74
40
Shear Strength, MPa 310 to 370
270 to 350
Tensile Strength: Ultimate (UTS), MPa 500 to 590
430 to 570
Tensile Strength: Yield (Proof), MPa 230 to 350
170 to 380

Thermal Properties

Latent Heat of Fusion, J/g 260
170
Maximum Temperature: Mechanical, °C 480
120
Melting Completion (Liquidus), °C 1470
890
Melting Onset (Solidus), °C 1430
870
Specific Heat Capacity, J/kg-K 470
380
Thermal Conductivity, W/m-K 41
110
Thermal Expansion, µm/m-K 13
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
24
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
27

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
23
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.8
2.8
Embodied Energy, MJ/kg 23
47
Embodied Water, L/kg 62
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
63 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
140 to 680
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 18 to 21
15 to 20
Strength to Weight: Bending, points 18 to 20
16 to 19
Thermal Diffusivity, mm2/s 11
35
Thermal Shock Resistance, points 14 to 17
14 to 19

Alloy Composition

Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
57 to 60
Iron (Fe), % 94.4 to 96
0.4 to 1.3
Lead (Pb), % 0
0.5 to 1.0
Manganese (Mn), % 0.3 to 0.6
0.050 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.025
0
Tin (Sn), % 0
0.5 to 1.5
Zinc (Zn), % 0
35.2 to 41.6
Residuals, % 0
0 to 0.5