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EN 1.4458 Stainless Steel vs. EN 1.4584 Stainless Steel

Both EN 1.4458 stainless steel and EN 1.4584 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4458 stainless steel and the bottom bar is EN 1.4584 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
34
Fatigue Strength, MPa 150
170
Impact Strength: V-Notched Charpy, J 67
67
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 510
500
Tensile Strength: Yield (Proof), MPa 190
210

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
420
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1420
1440
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 16
17
Thermal Expansion, µm/m-K 15
15

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 30
31
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.4
5.7
Embodied Energy, MJ/kg 75
78
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 30
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
140
Resilience: Unit (Modulus of Resilience), kJ/m3 89
110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
17
Strength to Weight: Bending, points 18
17
Thermal Diffusivity, mm2/s 4.2
4.5
Thermal Shock Resistance, points 12
12

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.025
Chromium (Cr), % 19 to 22
19 to 21
Copper (Cu), % 0 to 2.0
1.0 to 3.0
Iron (Fe), % 40.2 to 53
41.7 to 52
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 2.0 to 2.5
4.0 to 5.0
Nickel (Ni), % 26 to 30
24 to 26
Nitrogen (N), % 0 to 0.2
0 to 0.2
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.020