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EN 1.4401 Stainless Steel vs. EN 1.4659 Stainless Steel

Both EN 1.4401 stainless steel and EN 1.4659 stainless steel are iron alloys. They have 73% 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 1.4659 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
260
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 14 to 40
49
Fatigue Strength, MPa 200 to 320
460
Impact Strength: V-Notched Charpy, J 91 to 94
94
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
81
Shear Strength, MPa 410 to 550
640
Tensile Strength: Ultimate (UTS), MPa 600 to 900
900
Tensile Strength: Yield (Proof), MPa 230 to 570
480

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 950
1100
Melting Completion (Liquidus), °C 1440
1480
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
37
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 3.8
6.5
Embodied Energy, MJ/kg 52
89
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 26
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
370
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
550
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
31
Strength to Weight: Bending, points 20 to 26
25
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 13 to 20
19

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.020
Chromium (Cr), % 16.5 to 18.5
23 to 25
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 62.8 to 71.5
35.7 to 45.7
Manganese (Mn), % 0 to 2.0
2.0 to 4.0
Molybdenum (Mo), % 2.0 to 2.5
5.5 to 6.5
Nickel (Ni), % 10 to 13
21 to 23
Nitrogen (N), % 0 to 0.1
0.35 to 0.5
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.015
0 to 0.010
Tungsten (W), % 0
1.5 to 2.5