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EN 1.4401 Stainless Steel vs. EN 1.4374 Stainless Steel

Both EN 1.4401 stainless steel and EN 1.4374 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4401 stainless steel and the bottom bar is EN 1.4374 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 14 to 40
40
Fatigue Strength, MPa 200 to 320
340
Impact Strength: V-Notched Charpy, J 91 to 94
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 410 to 550
550
Tensile Strength: Ultimate (UTS), MPa 600 to 900
800
Tensile Strength: Yield (Proof), MPa 230 to 570
400

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 950
920
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.8
2.9
Embodied Energy, MJ/kg 52
42
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 26
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
270
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
400
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 32
29
Strength to Weight: Bending, points 20 to 26
25
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 13 to 20
17

Alloy Composition

Carbon (C), % 0 to 0.070
0.050 to 0.1
Chromium (Cr), % 16.5 to 18.5
17.5 to 18.5
Copper (Cu), % 0
0 to 0.4
Iron (Fe), % 62.8 to 71.5
63.5 to 67.9
Manganese (Mn), % 0 to 2.0
9.0 to 10
Molybdenum (Mo), % 2.0 to 2.5
0 to 0.5
Nickel (Ni), % 10 to 13
5.0 to 6.0
Nitrogen (N), % 0 to 0.1
0.25 to 0.32
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0 to 0.030