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AISI 439 Stainless Steel vs. EN 1.4421 Stainless Steel

Both AISI 439 stainless steel and EN 1.4421 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (6, 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 1.4421 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
11 to 17
Fatigue Strength, MPa 170
380 to 520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 490
880 to 1100
Tensile Strength: Yield (Proof), MPa 250
620 to 950

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 530
410
Maximum Temperature: Mechanical, °C 890
870
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
2.6
Embodied Energy, MJ/kg 34
36
Embodied Water, L/kg 120
130

Common Calculations

PREN (Pitting Resistance) 18
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 160
960 to 2270
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
31 to 39
Strength to Weight: Bending, points 18
26 to 30
Thermal Diffusivity, mm2/s 6.7
4.4
Thermal Shock Resistance, points 16
31 to 39

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.060
Chromium (Cr), % 17 to 19
15.5 to 17.5
Iron (Fe), % 77.1 to 82.8
74.4 to 80.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.7
Nickel (Ni), % 0 to 0.5
4.0 to 5.5
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0.2 to 1.1
0