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AISI 347 Stainless Steel vs. AISI 409 Stainless Steel

Both AISI 347 stainless steel and AISI 409 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 32 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 347 stainless steel and the bottom bar is AISI 409 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 46
24
Fatigue Strength, MPa 220 to 270
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 430 to 460
270
Tensile Strength: Ultimate (UTS), MPa 610 to 690
420
Tensile Strength: Yield (Proof), MPa 240 to 350
200

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 480
450
Maximum Temperature: Mechanical, °C 870
710
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
6.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.6
2.0
Embodied Energy, MJ/kg 52
28
Embodied Water, L/kg 150
94

Common Calculations

PREN (Pitting Resistance) 18
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 220
83
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 310
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 25
15
Strength to Weight: Bending, points 20 to 22
16
Thermal Diffusivity, mm2/s 4.3
6.7
Thermal Shock Resistance, points 13 to 15
15

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 17 to 19
10.5 to 11.7
Iron (Fe), % 64.1 to 74
84.9 to 89.5
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 13
0 to 0.5
Niobium (Nb), % 0 to 1.0
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
Titanium (Ti), % 0
0 to 0.75