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AISI 309 Stainless Steel vs. AISI 403 Stainless Steel

Both AISI 309 stainless steel and AISI 403 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 47
16 to 25
Fatigue Strength, MPa 250 to 280
200 to 340
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 84
83
Shear Modulus, GPa 78
76
Shear Strength, MPa 420 to 470
340 to 480
Tensile Strength: Ultimate (UTS), MPa 600 to 710
530 to 780
Tensile Strength: Yield (Proof), MPa 260 to 350
280 to 570

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 440
390
Maximum Temperature: Mechanical, °C 980
740
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
28
Thermal Expansion, µm/m-K 15
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
6.5
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.9
Embodied Energy, MJ/kg 51
27
Embodied Water, L/kg 170
99

Common Calculations

PREN (Pitting Resistance) 23
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
210 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
19 to 28
Strength to Weight: Bending, points 20 to 23
19 to 24
Thermal Diffusivity, mm2/s 4.3
7.6
Thermal Shock Resistance, points 14 to 16
20 to 29

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.15
Chromium (Cr), % 22 to 24
11.5 to 13
Iron (Fe), % 58 to 66
84.7 to 88.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 12 to 15
0 to 0.6
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030