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EN 1.4578 Stainless Steel vs. EN 1.4597 Stainless Steel

Both EN 1.4578 stainless steel and EN 1.4597 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 88% 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 1.4597 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
45
Fatigue Strength, MPa 200
300
Impact Strength: V-Notched Charpy, J 90
90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 400
470
Tensile Strength: Ultimate (UTS), MPa 550
680
Tensile Strength: Yield (Proof), MPa 200
330

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 930
860
Melting Completion (Liquidus), °C 1430
1400
Melting Onset (Solidus), °C 1390
1350
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
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
11
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.7
2.5
Embodied Energy, MJ/kg 51
36
Embodied Water, L/kg 160
140

Common Calculations

PREN (Pitting Resistance) 25
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
250
Resilience: Unit (Modulus of Resilience), kJ/m3 100
280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
25
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 3.9
4.1
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.1
Chromium (Cr), % 16.5 to 17.5
15 to 18
Copper (Cu), % 3.0 to 3.5
2.0 to 3.5
Iron (Fe), % 62.3 to 68.5
63 to 76.4
Manganese (Mn), % 0 to 2.0
6.5 to 9.0
Molybdenum (Mo), % 2.0 to 2.5
0 to 1.0
Nickel (Ni), % 10 to 11
0 to 3.0
Nitrogen (N), % 0 to 0.1
0.1 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.030