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ASTM A387 Grade 21L Class 1 vs. SAE-AISI H13 Steel

Both ASTM A387 grade 21L class 1 and SAE-AISI H13 steel are iron alloys. They have a very high 95% 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 H13 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
74
Tensile Strength: Ultimate (UTS), MPa 500
690 to 1820

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
29
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
6.0
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
4.3
Embodied Energy, MJ/kg 23
64
Embodied Water, L/kg 62
78

Common Calculations

PREN (Pitting Resistance) 6.4
9.9
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
25 to 65
Strength to Weight: Bending, points 18
22 to 43
Thermal Diffusivity, mm2/s 11
7.8
Thermal Shock Resistance, points 14
25 to 65

Alloy Composition

Carbon (C), % 0 to 0.1
0.32 to 0.45
Chromium (Cr), % 2.8 to 3.3
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.1
88.8 to 92
Manganese (Mn), % 0.3 to 0.6
0.2 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
1.1 to 1.8
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0.8 to 1.2
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0
0.8 to 1.2