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EN 1.4618 Stainless Steel vs. EN 1.4347 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4347 stainless steel are iron alloys. They have 90% 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 1.4618 stainless steel and the bottom bar is EN 1.4347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
23
Fatigue Strength, MPa 240 to 250
320
Impact Strength: V-Notched Charpy, J 90 to 91
34
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 680 to 700
660
Tensile Strength: Yield (Proof), MPa 250 to 260
480

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 410
450
Maximum Temperature: Mechanical, °C 900
1100
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1360
1370
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
16
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.7
3.1
Embodied Energy, MJ/kg 39
44
Embodied Water, L/kg 150
170

Common Calculations

PREN (Pitting Resistance) 19
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
140
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
570
Stiffness to Weight: Axial, points 14
15
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
4.0
Thermal Shock Resistance, points 15 to 16
19

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.050
Chromium (Cr), % 16.5 to 18.5
25 to 27
Copper (Cu), % 1.0 to 2.5
0
Iron (Fe), % 62.7 to 72.5
62.2 to 69.4
Manganese (Mn), % 5.5 to 9.5
0 to 1.5
Nickel (Ni), % 4.5 to 5.5
5.5 to 7.5
Nitrogen (N), % 0 to 0.15
0.1 to 0.2
Phosphorus (P), % 0 to 0.070
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.010
0 to 0.020