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SAE-AISI S1 Steel vs. ASTM A369 Grade FP21

Both SAE-AISI S1 steel and ASTM A369 grade FP21 are iron alloys. They have a very high 96% 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 SAE-AISI S1 steel and the bottom bar is ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 690 to 1840
470

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1500
1470
Melting Onset (Solidus), °C 1450
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
41
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
4.0
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.8
Embodied Energy, MJ/kg 37
23
Embodied Water, L/kg 56
61

Common Calculations

PREN (Pitting Resistance) 5.9
6.2
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24 to 64
17
Strength to Weight: Bending, points 22 to 42
17
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 21 to 56
14

Alloy Composition

Carbon (C), % 0.4 to 0.55
0.050 to 0.15
Chromium (Cr), % 1.0 to 1.8
2.7 to 3.4
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 91.6 to 96.7
94.3 to 96.2
Manganese (Mn), % 0.1 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
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 1.2
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 1.5 to 3.0
0
Vanadium (V), % 0.15 to 0.3
0