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EN 1.4308 Stainless Steel vs. EN 1.4640 Stainless Steel

Both EN 1.4308 stainless steel and EN 1.4640 stainless steel are iron alloys. They have a very high 96% 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 1.4308 stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
51
Fatigue Strength, MPa 160
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 510
620 to 650
Tensile Strength: Yield (Proof), MPa 200
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 960
930
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 15
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 43
40
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 100
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
22 to 23
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 11
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.070
0.030 to 0.080
Chromium (Cr), % 18 to 20
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 65.9 to 74
67.4 to 73.6
Manganese (Mn), % 0 to 1.5
1.5 to 4.0
Nickel (Ni), % 8.0 to 11
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015