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EN 1.4309 Stainless Steel vs. SAE-AISI 1340 Steel

Both EN 1.4309 stainless steel and SAE-AISI 1340 steel are iron alloys. They have 70% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4309 stainless steel and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
11 to 23
Fatigue Strength, MPa 170
220 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 490
540 to 730
Tensile Strength: Yield (Proof), MPa 210
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 960
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 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.4
Embodied Energy, MJ/kg 45
19
Embodied Water, L/kg 150
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 110
240 to 1040
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
19 to 26
Strength to Weight: Bending, points 18
19 to 23
Thermal Diffusivity, mm2/s 4.1
14
Thermal Shock Resistance, points 11
17 to 23

Alloy Composition

Carbon (C), % 0 to 0.030
0.38 to 0.43
Chromium (Cr), % 18 to 20
0
Iron (Fe), % 64.2 to 73
97.2 to 97.9
Manganese (Mn), % 0 to 2.0
1.6 to 1.9
Nickel (Ni), % 9.0 to 12
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.5
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.040