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EN 1.4421 Stainless Steel vs. EN 1.4438 Stainless Steel

Both EN 1.4421 stainless steel and EN 1.4438 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4421 stainless steel and the bottom bar is EN 1.4438 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
41
Fatigue Strength, MPa 380 to 520
220
Impact Strength: V-Notched Charpy, J 30 to 67
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
620
Tensile Strength: Yield (Proof), MPa 620 to 950
250

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 870
1000
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
14
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
4.4
Embodied Energy, MJ/kg 36
60
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 18
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
200
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
22
Strength to Weight: Bending, points 26 to 30
20
Thermal Diffusivity, mm2/s 4.4
3.7
Thermal Shock Resistance, points 31 to 39
14

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 15.5 to 17.5
17.5 to 19.5
Iron (Fe), % 74.4 to 80.5
57.3 to 66.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.7
3.0 to 4.0
Nickel (Ni), % 4.0 to 5.5
13 to 16
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 0.8
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.015