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AISI 440B Stainless Steel vs. ASTM A369 Grade FP22

Both AISI 440B stainless steel and ASTM A369 grade FP22 are iron alloys. They have 84% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 440B stainless steel and the bottom bar is ASTM A369 grade FP22.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 3.0 to 18
20
Fatigue Strength, MPa 260 to 850
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 460 to 1110
300
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
470
Tensile Strength: Yield (Proof), MPa 430 to 1860
240

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 870
460
Melting Completion (Liquidus), °C 1480
1470
Melting Onset (Solidus), °C 1370
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
3.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
1.7
Embodied Energy, MJ/kg 31
23
Embodied Water, L/kg 120
58

Common Calculations

PREN (Pitting Resistance) 18
5.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
80
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 70
17
Strength to Weight: Bending, points 24 to 45
17
Thermal Diffusivity, mm2/s 6.1
11
Thermal Shock Resistance, points 27 to 70
14

Alloy Composition

Carbon (C), % 0.75 to 1.0
0.050 to 0.15
Chromium (Cr), % 16 to 18
1.9 to 2.6
Iron (Fe), % 78.2 to 83.3
95 to 96.9
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.75
0.87 to 1.1
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.025