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EN 1.4429 Stainless Steel vs. EN 1.4373 Stainless Steel

Both EN 1.4429 stainless steel and EN 1.4373 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4429 stainless steel and the bottom bar is EN 1.4373 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
230
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
46
Fatigue Strength, MPa 280
340
Impact Strength: V-Notched Charpy, J 93
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 470
530
Tensile Strength: Ultimate (UTS), MPa 690
750
Tensile Strength: Yield (Proof), MPa 320
370

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 960
910
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
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 20
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.0
2.8
Embodied Energy, MJ/kg 55
40
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 29
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
290
Resilience: Unit (Modulus of Resilience), kJ/m3 250
340
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
27
Strength to Weight: Bending, points 22
24
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 15
16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 16.5 to 18.5
17 to 19
Iron (Fe), % 61.2 to 69.9
63 to 71.5
Manganese (Mn), % 0 to 2.0
7.5 to 10.5
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 11 to 14
4.0 to 6.0
Nitrogen (N), % 0.12 to 0.22
0.050 to 0.25
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015