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EN 1.4618 Stainless Steel vs. SAE-AISI 9255 Steel

Both EN 1.4618 stainless steel and SAE-AISI 9255 steel are iron alloys. They have 69% 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 1.4618 stainless steel and the bottom bar is SAE-AISI 9255 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
21
Fatigue Strength, MPa 240 to 250
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 480 to 500
430
Tensile Strength: Ultimate (UTS), MPa 680 to 700
680
Tensile Strength: Yield (Proof), MPa 250 to 260
390

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Mechanical, °C 900
400
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1360
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.7
1.5
Embodied Energy, MJ/kg 39
20
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
120
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
400
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 25
24
Strength to Weight: Bending, points 22 to 23
22
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 15 to 16
21

Alloy Composition

Carbon (C), % 0 to 0.1
0.51 to 0.59
Chromium (Cr), % 16.5 to 18.5
0
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
96.2 to 97
Manganese (Mn), % 5.5 to 9.5
0.7 to 1.0
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0 to 0.035
Silicon (Si), % 0 to 1.0
1.8 to 2.2
Sulfur (S), % 0 to 0.010
0 to 0.040