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EN 1.4640 Stainless Steel vs. EN 1.4864 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4864 stainless steel are iron alloys. They have 70% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
33
Fatigue Strength, MPa 230 to 250
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
75
Shear Strength, MPa 440 to 460
430
Tensile Strength: Ultimate (UTS), MPa 620 to 650
650
Tensile Strength: Yield (Proof), MPa 240 to 260
260

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 930
1100
Melting Completion (Liquidus), °C 1420
1390
Melting Onset (Solidus), °C 1380
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 16
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 14
30
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.8
5.3
Embodied Energy, MJ/kg 40
75
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 20
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
170
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
170
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 23
23
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 4.0
3.3
Thermal Shock Resistance, points 14 to 15
17

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.15
Chromium (Cr), % 18 to 19
15 to 17
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
41.7 to 51
Manganese (Mn), % 1.5 to 4.0
0 to 2.0
Nickel (Ni), % 5.5 to 6.9
33 to 37
Nitrogen (N), % 0.030 to 0.11
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.5
1.0 to 2.0
Sulfur (S), % 0 to 0.015
0 to 0.015