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EN 1.4618 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4618 stainless steel and EN 1.4640 stainless steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, 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 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
51
Fatigue Strength, MPa 240 to 250
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 480 to 500
440 to 460
Tensile Strength: Ultimate (UTS), MPa 680 to 700
620 to 650
Tensile Strength: Yield (Proof), MPa 250 to 260
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 900
930
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1360
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.7
2.8
Embodied Energy, MJ/kg 39
40
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 25
22 to 23
Strength to Weight: Bending, points 22 to 23
21
Thermal Diffusivity, mm2/s 4.0
4.0
Thermal Shock Resistance, points 15 to 16
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.1
0.030 to 0.080
Chromium (Cr), % 16.5 to 18.5
18 to 19
Copper (Cu), % 1.0 to 2.5
1.3 to 2.0
Iron (Fe), % 62.7 to 72.5
67.4 to 73.6
Manganese (Mn), % 5.5 to 9.5
1.5 to 4.0
Nickel (Ni), % 4.5 to 5.5
5.5 to 6.9
Nitrogen (N), % 0 to 0.15
0.030 to 0.11
Phosphorus (P), % 0 to 0.070
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.015

Comparable Variants