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AISI 304L Stainless Steel vs. AISI 439 Stainless Steel

Both AISI 304L stainless steel and AISI 439 stainless steel are iron alloys. They have 89% 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 304L stainless steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 350
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 6.7 to 46
23
Fatigue Strength, MPa 170 to 430
170
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 79
78
Shear Modulus, GPa 77
77
Shear Strength, MPa 370 to 680
310
Tensile Strength: Ultimate (UTS), MPa 540 to 1160
490
Tensile Strength: Yield (Proof), MPa 190 to 870
250

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
530
Maximum Temperature: Mechanical, °C 540
890
Melting Completion (Liquidus), °C 1450
1510
Melting Onset (Solidus), °C 1400
1430
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
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
9.0
Calomel Potential, mV -80
-220
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.1
2.3
Embodied Energy, MJ/kg 44
34
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 240
95
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 1900
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19 to 41
18
Strength to Weight: Bending, points 19 to 31
18
Thermal Diffusivity, mm2/s 4.2
6.7
Thermal Shock Resistance, points 12 to 25
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 18 to 20
17 to 19
Iron (Fe), % 65 to 74
77.1 to 82.8
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 8.0 to 12
0 to 0.5
Nitrogen (N), % 0 to 0.1
0 to 0.030
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1