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EN 1.4458 Stainless Steel vs. EN 1.4958 Stainless Steel

Both EN 1.4458 stainless steel and EN 1.4958 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. 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 1.4958 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
40
Fatigue Strength, MPa 150
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 510
630
Tensile Strength: Yield (Proof), MPa 190
190

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 430
500
Maximum Temperature: Mechanical, °C 1100
1090
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1370
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
12
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
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 30
30
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 5.4
5.3
Embodied Energy, MJ/kg 75
75
Embodied Water, L/kg 200
200

Common Calculations

PREN (Pitting Resistance) 30
21
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
190
Resilience: Unit (Modulus of Resilience), kJ/m3 89
95
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
22
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 4.2
3.2
Thermal Shock Resistance, points 12
15

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.5
Carbon (C), % 0 to 0.030
0.030 to 0.080
Chromium (Cr), % 19 to 22
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 2.0
0 to 0.5
Iron (Fe), % 40.2 to 53
41.1 to 50.6
Manganese (Mn), % 0 to 2.0
0 to 1.5
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 26 to 30
30 to 32.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0 to 0.2
0 to 0.030
Phosphorus (P), % 0 to 0.035
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.7
Sulfur (S), % 0 to 0.025
0 to 0.010
Titanium (Ti), % 0
0.2 to 0.5