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EN 1.4659 Stainless Steel vs. EN 1.4434 Stainless Steel

Both EN 1.4659 stainless steel and EN 1.4434 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 76% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4659 stainless steel and the bottom bar is EN 1.4434 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
200
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 49
41
Fatigue Strength, MPa 460
270
Impact Strength: V-Notched Charpy, J 94
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 81
79
Shear Strength, MPa 640
450
Tensile Strength: Ultimate (UTS), MPa 900
660
Tensile Strength: Yield (Proof), MPa 480
310

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 440
420
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1480
1450
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 37
21
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 6.5
4.2
Embodied Energy, MJ/kg 89
57
Embodied Water, L/kg 220
160

Common Calculations

PREN (Pitting Resistance) 54
32
Resilience: Ultimate (Unit Rupture Work), MJ/m3 370
220
Resilience: Unit (Modulus of Resilience), kJ/m3 550
240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 31
23
Strength to Weight: Bending, points 25
21
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.030
Chromium (Cr), % 23 to 25
16.5 to 19.5
Copper (Cu), % 1.0 to 2.0
0
Iron (Fe), % 35.7 to 45.7
59.2 to 69.9
Manganese (Mn), % 2.0 to 4.0
0 to 2.0
Molybdenum (Mo), % 5.5 to 6.5
3.0 to 4.0
Nickel (Ni), % 21 to 23
10.5 to 14
Nitrogen (N), % 0.35 to 0.5
0.1 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.010
0 to 0.015
Tungsten (W), % 1.5 to 2.5
0