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AISI 418 Stainless Steel vs. ASTM A369 Grade FP2

Both AISI 418 stainless steel and ASTM A369 grade FP2 are iron alloys. They have 83% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is ASTM A369 grade FP2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
130
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 520
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 680
270
Tensile Strength: Ultimate (UTS), MPa 1100
430
Tensile Strength: Yield (Proof), MPa 850
240

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
420
Melting Completion (Liquidus), °C 1500
1470
Melting Onset (Solidus), °C 1460
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
49
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 15
2.6
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.6
Embodied Energy, MJ/kg 41
20
Embodied Water, L/kg 110
50

Common Calculations

PREN (Pitting Resistance) 19
2.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
75
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 29
16
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 40
13

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.1 to 0.2
Chromium (Cr), % 12 to 14
0.5 to 0.81
Iron (Fe), % 78.5 to 83.6
97.4 to 98.6
Manganese (Mn), % 0 to 0.5
0.3 to 0.61
Molybdenum (Mo), % 0 to 0.5
0.44 to 0.65
Nickel (Ni), % 1.8 to 2.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.5
0.1 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 2.5 to 3.5
0