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AISI 204 Stainless Steel vs. AISI 440B Stainless Steel

Both AISI 204 stainless steel and AISI 440B stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 204 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, % 23 to 39
3.0 to 18
Fatigue Strength, MPa 320 to 720
260 to 850
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 500 to 700
460 to 1110
Tensile Strength: Ultimate (UTS), MPa 730 to 1100
740 to 1930
Tensile Strength: Yield (Proof), MPa 380 to 1080
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 850
870
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
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 2.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.4
2.2
Embodied Energy, MJ/kg 35
31
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240 to 250
57 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 40
27 to 70
Strength to Weight: Bending, points 24 to 31
24 to 45
Thermal Diffusivity, mm2/s 4.1
6.1
Thermal Shock Resistance, points 16 to 24
27 to 70

Alloy Composition

Carbon (C), % 0 to 0.030
0.75 to 1.0
Chromium (Cr), % 15 to 17
16 to 18
Iron (Fe), % 69.6 to 76.4
78.2 to 83.3
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 1.5 to 3.0
0
Nitrogen (N), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015

Comparable Variants