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ASTM A387 Grade 21 Steel vs. C86100 Bronze

ASTM A387 grade 21 steel belongs to the iron alloys classification, while C86100 bronze belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 C86100 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 21
20
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 74
43
Tensile Strength: Ultimate (UTS), MPa 500 to 590
660
Tensile Strength: Yield (Proof), MPa 230 to 350
350

Thermal Properties

Latent Heat of Fusion, J/g 260
200
Maximum Temperature: Mechanical, °C 480
170
Melting Completion (Liquidus), °C 1470
940
Melting Onset (Solidus), °C 1430
900
Specific Heat Capacity, J/kg-K 470
420
Thermal Conductivity, W/m-K 41
35
Thermal Expansion, µm/m-K 13
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
9.0

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
2.9
Embodied Energy, MJ/kg 23
49
Embodied Water, L/kg 62
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 320
530
Stiffness to Weight: Axial, points 13
7.8
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 18 to 21
23
Strength to Weight: Bending, points 18 to 20
21
Thermal Diffusivity, mm2/s 11
10
Thermal Shock Resistance, points 14 to 17
21

Alloy Composition

Aluminum (Al), % 0
4.5 to 5.5
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
66 to 68
Iron (Fe), % 94.4 to 96
2.0 to 4.0
Lead (Pb), % 0
0 to 0.1
Manganese (Mn), % 0.3 to 0.6
2.5 to 5.0
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 to 0.1
Zinc (Zn), % 0
17.3 to 25