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AISI 304 Stainless Steel vs. SAE-AISI 1340 Steel

Both AISI 304 stainless steel and SAE-AISI 1340 steel are iron alloys. They have 72% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 360
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 8.0 to 43
11 to 23
Fatigue Strength, MPa 210 to 440
220 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 400 to 690
340 to 440
Tensile Strength: Ultimate (UTS), MPa 580 to 1180
540 to 730
Tensile Strength: Yield (Proof), MPa 230 to 860
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 710
400
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 17
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 15
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.4
Embodied Energy, MJ/kg 43
19
Embodied Water, L/kg 150
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 86 to 250
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 1870
240 to 1040
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 42
19 to 26
Strength to Weight: Bending, points 20 to 32
19 to 23
Thermal Diffusivity, mm2/s 4.2
14
Thermal Shock Resistance, points 12 to 25
17 to 23

Alloy Composition

Carbon (C), % 0 to 0.080
0.38 to 0.43
Chromium (Cr), % 18 to 20
0
Iron (Fe), % 66.5 to 74
97.2 to 97.9
Manganese (Mn), % 0 to 2.0
1.6 to 1.9
Nickel (Ni), % 8.0 to 10.5
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 0.75
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040

Comparable Variants