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SAE-AISI M48 Steel vs. ASTM A369 Grade FP21

Both SAE-AISI M48 steel and ASTM A369 grade FP21 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 SAE-AISI M48 steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
74
Tensile Strength: Ultimate (UTS), MPa 890 to 2390
470

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 48
4.0
Density, g/cm3 8.7
7.8
Embodied Carbon, kg CO2/kg material 13
1.8
Embodied Energy, MJ/kg 190
23
Embodied Water, L/kg 160
61

Common Calculations

PREN (Pitting Resistance) 37
6.2
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 28 to 76
17
Strength to Weight: Bending, points 23 to 45
17
Thermal Shock Resistance, points 26 to 71
14

Alloy Composition

Carbon (C), % 1.4 to 1.5
0.050 to 0.15
Chromium (Cr), % 3.5 to 4.0
2.7 to 3.4
Cobalt (Co), % 8.0 to 10
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 63.8 to 69.8
94.3 to 96.2
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 4.8 to 5.5
0.8 to 1.1
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.15 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 9.5 to 10.5
0
Vanadium (V), % 2.8 to 3.3
0