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EN 1.4508 Stainless Steel vs. EN 1.4618 Stainless Steel

Both EN 1.4508 stainless steel and EN 1.4618 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.4508 stainless steel and the bottom bar is EN 1.4618 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
51
Fatigue Strength, MPa 210
240 to 250
Impact Strength: V-Notched Charpy, J 90
90 to 91
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 570
680 to 700
Tensile Strength: Yield (Proof), MPa 260
250 to 260

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1000
900
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1360
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 20
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 4.0
2.7
Embodied Energy, MJ/kg 55
39
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 32
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
270 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 170
160 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 20
24 to 25
Strength to Weight: Bending, points 19
22 to 23
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 17
15 to 16

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 18 to 20
16.5 to 18.5
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 61.2 to 69.9
62.7 to 72.5
Manganese (Mn), % 0 to 1.5
5.5 to 9.5
Molybdenum (Mo), % 3.0 to 3.5
0
Nickel (Ni), % 9.0 to 12
4.5 to 5.5
Nitrogen (N), % 0.1 to 0.2
0 to 0.15
Phosphorus (P), % 0 to 0.040
0 to 0.070
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010