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EN 1.4438 Stainless Steel vs. EN 1.4422 Stainless Steel

Both EN 1.4438 stainless steel and EN 1.4422 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 33 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 EN 1.4438 stainless steel and the bottom bar is EN 1.4422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 41
17
Fatigue Strength, MPa 220
380
Impact Strength: V-Notched Charpy, J 90
110
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
76
Shear Strength, MPa 420
520
Tensile Strength: Ultimate (UTS), MPa 620
850
Tensile Strength: Yield (Proof), MPa 250
630

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 1000
760
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 14
16
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 22
11
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 4.4
2.7
Embodied Energy, MJ/kg 60
37
Embodied Water, L/kg 160
110

Common Calculations

PREN (Pitting Resistance) 31
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
130
Resilience: Unit (Modulus of Resilience), kJ/m3 150
1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
30
Strength to Weight: Bending, points 20
25
Thermal Diffusivity, mm2/s 3.7
4.3
Thermal Shock Resistance, points 14
31

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.020
Chromium (Cr), % 17.5 to 19.5
11 to 13
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 57.3 to 66.5
76.8 to 83.5
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 3.0 to 4.0
1.3 to 1.8
Nickel (Ni), % 13 to 16
4.0 to 5.0
Nitrogen (N), % 0 to 0.1
0 to 0.020
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.0030