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ASTM A387 Grade 21L Class 1 vs. SAE-AISI M48 Steel

Both ASTM A387 grade 21L class 1 and SAE-AISI M48 steel are iron alloys. They have 71% of their average alloy composition in common. 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 ASTM A387 grade 21L class 1 and the bottom bar is SAE-AISI M48 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
78
Tensile Strength: Ultimate (UTS), MPa 500
890 to 2390

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1470
1670
Melting Onset (Solidus), °C 1430
1620
Specific Heat Capacity, J/kg-K 470
420
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
48
Density, g/cm3 7.9
8.7
Embodied Carbon, kg CO2/kg material 1.8
13
Embodied Energy, MJ/kg 23
190
Embodied Water, L/kg 62
160

Common Calculations

PREN (Pitting Resistance) 6.4
37
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
22
Strength to Weight: Axial, points 18
28 to 76
Strength to Weight: Bending, points 18
23 to 45
Thermal Shock Resistance, points 14
26 to 71

Alloy Composition

Carbon (C), % 0 to 0.1
1.4 to 1.5
Chromium (Cr), % 2.8 to 3.3
3.5 to 4.0
Cobalt (Co), % 0
8.0 to 10
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.1
63.8 to 69.8
Manganese (Mn), % 0.3 to 0.6
0.15 to 0.4
Molybdenum (Mo), % 0.9 to 1.1
4.8 to 5.5
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0.15 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
9.5 to 10.5
Vanadium (V), % 0
2.8 to 3.3