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ASTM A387 Grade 22 Steel vs. AISI 440B Stainless Steel

Both ASTM A387 grade 22 steel and AISI 440B stainless steel 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 ASTM A387 grade 22 steel and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21
3.0 to 18
Fatigue Strength, MPa 160 to 240
260 to 850
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 300 to 380
460 to 1110
Tensile Strength: Ultimate (UTS), MPa 480 to 600
740 to 1930
Tensile Strength: Yield (Proof), MPa 230 to 350
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Maximum Temperature: Mechanical, °C 460
870
Melting Completion (Liquidus), °C 1470
1480
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
23
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
2.9

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 5.6
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 85 to 110
57 to 110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 21
27 to 70
Strength to Weight: Bending, points 17 to 20
24 to 45
Thermal Diffusivity, mm2/s 11
6.1
Thermal Shock Resistance, points 14 to 17
27 to 70

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.75 to 1.0
Chromium (Cr), % 2.0 to 2.5
16 to 18
Iron (Fe), % 95.1 to 96.8
78.2 to 83.3
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.75
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015

Comparable Variants