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R60802 Alloy vs. ASTM A387 Grade 21 Steel

R60802 alloy belongs to the otherwise unclassified metals classification, while ASTM A387 grade 21 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R60802 alloy and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 98
190
Elongation at Break, % 22
21
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 36
74
Tensile Strength: Ultimate (UTS), MPa 430
500 to 590
Tensile Strength: Yield (Proof), MPa 270
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Specific Heat Capacity, J/kg-K 270
470
Thermal Conductivity, W/m-K 22
41
Thermal Expansion, µm/m-K 6.0
13

Otherwise Unclassified Properties

Density, g/cm3 6.5
7.9
Embodied Water, L/kg 290
62

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 85
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 380
140 to 320
Stiffness to Weight: Axial, points 8.3
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 18
18 to 21
Strength to Weight: Bending, points 19
18 to 20
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 53
14 to 17

Alloy Composition

Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0.050 to 0.15
2.8 to 3.3
Iron (Fe), % 0.070 to 0.2
94.4 to 96
Manganese (Mn), % 0
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0.030 to 0.080
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tin (Sn), % 1.2 to 1.7
0
Zirconium (Zr), % 97.8 to 98.7
0
Residuals, % 0 to 0.11
0