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SAE-AISI T6 Steel vs. ASTM A369 Grade FP21

Both SAE-AISI T6 steel and ASTM A369 grade FP21 are iron alloys. They have 64% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T6 steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
74
Tensile Strength: Ultimate (UTS), MPa 880 to 2150
470

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1830
1470
Melting Onset (Solidus), °C 1770
1430
Specific Heat Capacity, J/kg-K 400
470
Thermal Conductivity, W/m-K 18
41
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 70
4.0
Density, g/cm3 9.5
7.8
Embodied Carbon, kg CO2/kg material 11
1.8
Embodied Energy, MJ/kg 170
23
Embodied Water, L/kg 160
61

Common Calculations

PREN (Pitting Resistance) 39
6.2
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 26 to 63
17
Strength to Weight: Bending, points 21 to 39
17
Thermal Diffusivity, mm2/s 4.7
11
Thermal Shock Resistance, points 26 to 64
14

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.050 to 0.15
Chromium (Cr), % 4.0 to 4.8
2.7 to 3.4
Cobalt (Co), % 11 to 13
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 55.9 to 63.5
94.3 to 96.2
Manganese (Mn), % 0.2 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 0.4 to 1.0
0.8 to 1.1
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 18.5 to 21
0
Vanadium (V), % 1.5 to 2.1
0