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EN 1.4578 Stainless Steel vs. EN 1.4369 Stainless Steel

Both EN 1.4578 stainless steel and EN 1.4369 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a moderately high 91% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4578 stainless steel and the bottom bar is EN 1.4369 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
40
Fatigue Strength, MPa 200
330
Impact Strength: V-Notched Charpy, J 90
91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 400
580
Tensile Strength: Ultimate (UTS), MPa 550
850
Tensile Strength: Yield (Proof), MPa 200
390

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 930
940
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 14
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 19
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.7
3.0
Embodied Energy, MJ/kg 51
43
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
280
Resilience: Unit (Modulus of Resilience), kJ/m3 100
380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
31
Strength to Weight: Bending, points 19
26
Thermal Diffusivity, mm2/s 3.9
4.0
Thermal Shock Resistance, points 12
18

Alloy Composition

Carbon (C), % 0 to 0.040
0.070 to 0.15
Chromium (Cr), % 16.5 to 17.5
17.5 to 19.5
Copper (Cu), % 3.0 to 3.5
0
Iron (Fe), % 62.3 to 68.5
63 to 70.2
Manganese (Mn), % 0 to 2.0
5.0 to 7.5
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 11
6.5 to 8.5
Nitrogen (N), % 0 to 0.1
0.2 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0.5 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015