MakeItFrom.com
Menu (ESC)

ASTM A369 Grade FP9 vs. AISI 420 Stainless Steel

Both ASTM A369 grade FP9 and AISI 420 stainless steel are iron alloys. They have a very high 95% 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 FP9 and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
8.0 to 15
Fatigue Strength, MPa 160
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Shear Strength, MPa 300
420 to 1010
Tensile Strength: Ultimate (UTS), MPa 470
690 to 1720
Tensile Strength: Yield (Proof), MPa 240
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 600
620
Melting Completion (Liquidus), °C 1450
1510
Melting Onset (Solidus), °C 1410
1450
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
27
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 10
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.0
Embodied Energy, MJ/kg 28
28
Embodied Water, L/kg 87
100

Common Calculations

PREN (Pitting Resistance) 12
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 140
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
25 to 62
Strength to Weight: Bending, points 17
22 to 41
Thermal Diffusivity, mm2/s 6.9
7.3
Thermal Shock Resistance, points 13
25 to 62

Alloy Composition

Carbon (C), % 0 to 0.15
0.15 to 0.4
Chromium (Cr), % 8.0 to 10
12 to 14
Iron (Fe), % 87.1 to 90.3
82.3 to 87.9
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.5
Nickel (Ni), % 0
0 to 0.75
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.5 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030