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AISI 440A Stainless Steel vs. ASTM A182 Grade F5a

Both AISI 440A stainless steel and ASTM A182 grade F5a are iron alloys. They have 87% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 440A stainless steel and the bottom bar is ASTM A182 grade F5a.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 5.0 to 20
25
Fatigue Strength, MPa 270 to 790
380
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Shear Strength, MPa 450 to 1040
450
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
710
Tensile Strength: Yield (Proof), MPa 420 to 1650
520

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 760
510
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1370
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
40
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
4.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.8
Embodied Energy, MJ/kg 31
24
Embodied Water, L/kg 120
69

Common Calculations

PREN (Pitting Resistance) 18
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 65
25
Strength to Weight: Bending, points 23 to 43
23
Thermal Diffusivity, mm2/s 6.2
11
Thermal Shock Resistance, points 26 to 65
20

Alloy Composition

Carbon (C), % 0.6 to 0.75
0 to 0.25
Chromium (Cr), % 16 to 18
4.0 to 6.0
Iron (Fe), % 78.4 to 83.4
91.4 to 95.6
Manganese (Mn), % 0 to 1.0
0 to 0.6
Molybdenum (Mo), % 0 to 0.75
0.44 to 0.65
Nickel (Ni), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.030