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ASTM A387 Grade 21L Class 1 vs. SAE-AISI S5 Steel

Both ASTM A387 grade 21L class 1 and SAE-AISI S5 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A387 grade 21L class 1 and the bottom bar is SAE-AISI S5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Tensile Strength: Ultimate (UTS), MPa 500
680 to 1940

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 41
42
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
3.1
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.8
2.1
Embodied Energy, MJ/kg 23
29
Embodied Water, L/kg 62
51

Common Calculations

PREN (Pitting Resistance) 6.4
2.9
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
25 to 70
Strength to Weight: Bending, points 18
22 to 45
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 14
23 to 65

Alloy Composition

Carbon (C), % 0 to 0.1
0.5 to 0.65
Chromium (Cr), % 2.8 to 3.3
0 to 0.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.1
93.6 to 97
Manganese (Mn), % 0.3 to 0.6
0.6 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0.2 to 1.4
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
1.8 to 2.3
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
0 to 0.35