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ASTM A369 Grade FP5 vs. AISI 321 Stainless Steel

Both ASTM A369 grade FP5 and AISI 321 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP5 and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
170 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20
34 to 50
Fatigue Strength, MPa 160
220 to 270
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 300
420 to 460
Tensile Strength: Ultimate (UTS), MPa 470
590 to 690
Tensile Strength: Yield (Proof), MPa 240
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Maximum Temperature: Mechanical, °C 510
870
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
3.2
Embodied Energy, MJ/kg 23
45
Embodied Water, L/kg 69
140

Common Calculations

PREN (Pitting Resistance) 6.8
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 140
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
21 to 25
Strength to Weight: Bending, points 17
20 to 22
Thermal Diffusivity, mm2/s 11
4.1
Thermal Shock Resistance, points 13
13 to 15

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.080
Chromium (Cr), % 4.0 to 6.0
17 to 19
Iron (Fe), % 92.1 to 95.3
65.3 to 74
Manganese (Mn), % 0.3 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.45 to 0.65
0
Nickel (Ni), % 0
9.0 to 12
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.025
0 to 0.030
Titanium (Ti), % 0
0 to 0.7