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EN 1.4458 Stainless Steel vs. SAE-AISI 9255 Steel

Both EN 1.4458 stainless steel and SAE-AISI 9255 steel are iron alloys. They have 48% 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 SAE-AISI 9255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
21
Fatigue Strength, MPa 150
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 510
680
Tensile Strength: Yield (Proof), MPa 190
390

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Mechanical, °C 1100
400
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 16
46
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 30
2.0
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 5.4
1.5
Embodied Energy, MJ/kg 75
20
Embodied Water, L/kg 200
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
120
Resilience: Unit (Modulus of Resilience), kJ/m3 89
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
24
Strength to Weight: Bending, points 18
22
Thermal Diffusivity, mm2/s 4.2
13
Thermal Shock Resistance, points 12
21

Alloy Composition

Carbon (C), % 0 to 0.030
0.51 to 0.59
Chromium (Cr), % 19 to 22
0
Copper (Cu), % 0 to 2.0
0
Iron (Fe), % 40.2 to 53
96.2 to 97
Manganese (Mn), % 0 to 2.0
0.7 to 1.0
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 26 to 30
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.0
1.8 to 2.2
Sulfur (S), % 0 to 0.025
0 to 0.040