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AISI 439 Stainless Steel vs. AISI 316 Stainless Steel

Both AISI 439 stainless steel and AISI 316 stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is AISI 316 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160 to 360
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
8.0 to 55
Fatigue Strength, MPa 170
210 to 430
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
80
Rockwell B Hardness 78
80
Shear Modulus, GPa 77
78
Shear Strength, MPa 310
350 to 690
Tensile Strength: Ultimate (UTS), MPa 490
520 to 1180
Tensile Strength: Yield (Proof), MPa 250
230 to 850

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 530
410
Maximum Temperature: Mechanical, °C 890
590
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
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
19
Calomel Potential, mV -220
-50
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
3.9
Embodied Energy, MJ/kg 34
53
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 18
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
85 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 160
130 to 1820
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
18 to 41
Strength to Weight: Bending, points 18
18 to 31
Thermal Diffusivity, mm2/s 6.7
4.1
Thermal Shock Resistance, points 16
11 to 26

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
16 to 18
Iron (Fe), % 77.1 to 82.8
62 to 72
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0 to 0.5
10 to 14
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