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AISI 439 Stainless Steel vs. AISI 403 Stainless Steel

Both AISI 439 stainless steel and AISI 403 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 35 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 439 stainless steel and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
16 to 25
Fatigue Strength, MPa 170
200 to 340
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
47 to 50
Rockwell B Hardness 78
83
Shear Modulus, GPa 77
76
Shear Strength, MPa 310
340 to 480
Tensile Strength: Ultimate (UTS), MPa 490
530 to 780
Tensile Strength: Yield (Proof), MPa 250
280 to 570

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 530
390
Maximum Temperature: Mechanical, °C 890
740
Melting Completion (Liquidus), °C 1510
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
28
Thermal Expansion, µm/m-K 11
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.9
Embodied Energy, MJ/kg 34
27
Embodied Water, L/kg 120
99

Common Calculations

PREN (Pitting Resistance) 18
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 160
210 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19 to 28
Strength to Weight: Bending, points 18
19 to 24
Thermal Diffusivity, mm2/s 6.7
7.6
Thermal Shock Resistance, points 16
20 to 29

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 17 to 19
11.5 to 13
Iron (Fe), % 77.1 to 82.8
84.7 to 88.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Nickel (Ni), % 0 to 0.5
0 to 0.6
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 1.1
0