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EN 1.4458 Stainless Steel vs. EN 1.4658 Stainless Steel

Both EN 1.4458 stainless steel and EN 1.4658 stainless steel are iron alloys. Both are furnished in the solution annealed (AT) condition. They have 78% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4458 stainless steel and the bottom bar is EN 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
260
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34
28
Fatigue Strength, MPa 150
530
Impact Strength: V-Notched Charpy, J 67
110
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 510
900
Tensile Strength: Yield (Proof), MPa 190
730

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1370
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 30
25
Density, g/cm3 8.0
7.8
Embodied Carbon, kg CO2/kg material 5.4
4.5
Embodied Energy, MJ/kg 75
61
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 30
49
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
240
Resilience: Unit (Modulus of Resilience), kJ/m3 89
1280
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
32
Strength to Weight: Bending, points 18
26
Thermal Diffusivity, mm2/s 4.2
4.3
Thermal Shock Resistance, points 12
24

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 19 to 22
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 0 to 2.0
0 to 1.0
Iron (Fe), % 40.2 to 53
50.9 to 63.7
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 2.5
4.0 to 5.0
Nickel (Ni), % 26 to 30
5.5 to 9.5
Nitrogen (N), % 0 to 0.2
0.3 to 0.5
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.010