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AISI 439 Stainless Steel vs. AISI 317L Stainless Steel

Both AISI 439 stainless steel and AISI 317L stainless steel are iron alloys. Both are furnished in the annealed condition. They have 82% 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 317L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
44
Fatigue Strength, MPa 170
220
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
56
Rockwell B Hardness 78
81
Shear Modulus, GPa 77
82
Shear Strength, MPa 310
380
Tensile Strength: Ultimate (UTS), MPa 490
550
Tensile Strength: Yield (Proof), MPa 250
250

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 530
420
Maximum Temperature: Mechanical, °C 890
1010
Melting Completion (Liquidus), °C 1510
1400
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
21
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
4.3
Embodied Energy, MJ/kg 34
59
Embodied Water, L/kg 120
160

Common Calculations

PREN (Pitting Resistance) 18
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
200
Resilience: Unit (Modulus of Resilience), kJ/m3 160
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
19
Strength to Weight: Bending, points 18
19
Thermal Diffusivity, mm2/s 6.7
3.8
Thermal Shock Resistance, points 16
12

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
18 to 20
Iron (Fe), % 77.1 to 82.8
58 to 68
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.5
11 to 15
Nitrogen (N), % 0 to 0.030
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0.2 to 1.1
0