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AISI 439 Stainless Steel vs. EN 1.4640 Stainless Steel

Both AISI 439 stainless steel and EN 1.4640 stainless steel are iron alloys. They have 90% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
51
Fatigue Strength, MPa 170
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 310
440 to 460
Tensile Strength: Ultimate (UTS), MPa 490
620 to 650
Tensile Strength: Yield (Proof), MPa 250
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 530
420
Maximum Temperature: Mechanical, °C 890
930
Melting Completion (Liquidus), °C 1510
1420
Melting Onset (Solidus), °C 1430
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.8
Embodied Energy, MJ/kg 34
40
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 18
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 160
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
22 to 23
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 16
14 to 15

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0.030 to 0.080
Chromium (Cr), % 17 to 19
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 77.1 to 82.8
67.4 to 73.6
Manganese (Mn), % 0 to 1.0
1.5 to 4.0
Nickel (Ni), % 0 to 0.5
5.5 to 6.9
Nitrogen (N), % 0 to 0.030
0.030 to 0.11
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0.2 to 1.1
0