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ASTM A369 Grade FP12 vs. AISI 418 Stainless Steel

Both ASTM A369 grade FP12 and AISI 418 stainless steel 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 ASTM A369 grade FP12 and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
17
Fatigue Strength, MPa 170
520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 300
680
Tensile Strength: Ultimate (UTS), MPa 470
1100
Tensile Strength: Yield (Proof), MPa 250
850

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 430
770
Melting Completion (Liquidus), °C 1470
1500
Melting Onset (Solidus), °C 1430
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
15
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.6
2.9
Embodied Energy, MJ/kg 21
41
Embodied Water, L/kg 52
110

Common Calculations

PREN (Pitting Resistance) 2.8
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
170
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1830
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
38
Strength to Weight: Bending, points 17
29
Thermal Diffusivity, mm2/s 12
6.7
Thermal Shock Resistance, points 14
40

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.15 to 0.2
Chromium (Cr), % 0.8 to 1.3
12 to 14
Iron (Fe), % 96.8 to 98.4
78.5 to 83.6
Manganese (Mn), % 0.3 to 0.61
0 to 0.5
Molybdenum (Mo), % 0.44 to 0.65
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5