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AISI 304 Stainless Steel vs. AISI 440B Stainless Steel

Both AISI 304 stainless steel and AISI 440B stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 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 304 stainless steel and the bottom bar is AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 8.0 to 43
3.0 to 18
Fatigue Strength, MPa 210 to 440
260 to 850
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400 to 690
460 to 1110
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
740 to 1930
Tensile Strength: Yield (Proof), MPa 230 to 860
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 710
870
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
23
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.0
2.2
Embodied Energy, MJ/kg 43
31
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
57 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 42
27 to 70
Strength to Weight: Bending, points 20 to 32
24 to 45
Thermal Diffusivity, mm2/s 4.2
6.1
Thermal Shock Resistance, points 12 to 25
27 to 70

Alloy Composition

Carbon (C), % 0 to 0.080
0.75 to 1.0
Chromium (Cr), % 18 to 20
16 to 18
Iron (Fe), % 66.5 to 74
78.2 to 83.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 8.0 to 10.5
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015

Comparable Variants