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EN 1.4640 Stainless Steel vs. SAE-AISI 1340 Steel

Both EN 1.4640 stainless steel and SAE-AISI 1340 steel are iron alloys. They have 73% of their average alloy composition in common. There are 31 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 1.4640 stainless steel and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 51
11 to 23
Fatigue Strength, MPa 230 to 250
220 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 440 to 460
340 to 440
Tensile Strength: Ultimate (UTS), MPa 620 to 650
540 to 730
Tensile Strength: Yield (Proof), MPa 240 to 260
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 930
400
Melting Completion (Liquidus), °C 1420
1450
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
51
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 40
19
Embodied Water, L/kg 150
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
240 to 1040
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 23
19 to 26
Strength to Weight: Bending, points 21
19 to 23
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 14 to 15
17 to 23

Alloy Composition

Carbon (C), % 0.030 to 0.080
0.38 to 0.43
Chromium (Cr), % 18 to 19
0
Copper (Cu), % 1.3 to 2.0
0
Iron (Fe), % 67.4 to 73.6
97.2 to 97.9
Manganese (Mn), % 1.5 to 4.0
1.6 to 1.9
Nickel (Ni), % 5.5 to 6.9
0
Nitrogen (N), % 0.030 to 0.11
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.5
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040

Comparable Variants