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EN 1.4458 Stainless Steel vs. AISI 440B Stainless Steel

Both EN 1.4458 stainless steel and AISI 440B stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 AISI 440B stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
3.0 to 18
Fatigue Strength, MPa 150
260 to 850
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 510
740 to 1930
Tensile Strength: Yield (Proof), MPa 190
430 to 1860

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 430
390
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1420
1480
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
23
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.0
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
2.2
Embodied Energy, MJ/kg 75
31
Embodied Water, L/kg 200
120

Common Calculations

PREN (Pitting Resistance) 30
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
57 to 110
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
27 to 70
Strength to Weight: Bending, points 18
24 to 45
Thermal Diffusivity, mm2/s 4.2
6.1
Thermal Shock Resistance, points 12
27 to 70

Alloy Composition

Carbon (C), % 0 to 0.030
0.75 to 1.0
Chromium (Cr), % 19 to 22
16 to 18
Copper (Cu), % 0 to 2.0
0
Iron (Fe), % 40.2 to 53
78.2 to 83.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0 to 0.75
Nickel (Ni), % 26 to 30
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.015