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AISI 304 Stainless Steel vs. AISI 384 Stainless Steel

Both AISI 304 stainless steel and AISI 384 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 384 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 360
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
480

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 710
910
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 15
20
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.0
3.7
Embodied Energy, MJ/kg 43
52
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 20
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 42
17
Strength to Weight: Bending, points 20 to 32
17
Thermal Diffusivity, mm2/s 4.2
4.3
Thermal Shock Resistance, points 12 to 25
11

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.040
Chromium (Cr), % 18 to 20
15 to 17
Iron (Fe), % 66.5 to 74
60.9 to 68
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 8.0 to 10.5
17 to 19
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030