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EN 1.4640 Stainless Steel vs. EN 1.4123 Stainless Steel

Both EN 1.4640 stainless steel and EN 1.4123 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is EN 1.4123 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
220 to 250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 620 to 650
720 to 810

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 930
840
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 14
10
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.8
4.2
Embodied Energy, MJ/kg 40
62
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 20
24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22 to 23
26 to 29
Strength to Weight: Bending, points 21
23 to 25
Thermal Diffusivity, mm2/s 4.0
6.3
Thermal Shock Resistance, points 14 to 15
26 to 29

Alloy Composition

Carbon (C), % 0.030 to 0.080
0.35 to 0.5
Chromium (Cr), % 18 to 19
14 to 16.5
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
76.7 to 84.6
Manganese (Mn), % 1.5 to 4.0
0 to 1.0
Molybdenum (Mo), % 0
1.0 to 2.5
Nickel (Ni), % 5.5 to 6.9
0 to 0.5
Nitrogen (N), % 0.030 to 0.11
0.1 to 0.3
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0
0 to 1.5