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SAE-AISI 1340 Steel vs. AISI 429 Stainless Steel

Both SAE-AISI 1340 steel and AISI 429 stainless steel are iron alloys. They have 85% of their average alloy composition in common. There are 31 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 SAE-AISI 1340 steel and the bottom bar is AISI 429 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 210
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 23
25
Fatigue Strength, MPa 220 to 390
180
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 72
77
Shear Strength, MPa 340 to 440
300
Tensile Strength: Ultimate (UTS), MPa 540 to 730
480
Tensile Strength: Yield (Proof), MPa 300 to 620
260

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
810
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
26
Thermal Expansion, µm/m-K 12
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.0
Embodied Energy, MJ/kg 19
28
Embodied Water, L/kg 48
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 110
99
Resilience: Unit (Modulus of Resilience), kJ/m3 240 to 1040
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19 to 26
17
Strength to Weight: Bending, points 19 to 23
18
Thermal Diffusivity, mm2/s 14
6.9
Thermal Shock Resistance, points 17 to 23
17

Alloy Composition

Carbon (C), % 0.38 to 0.43
0 to 0.12
Chromium (Cr), % 0
14 to 16
Iron (Fe), % 97.2 to 97.9
81.8 to 86
Manganese (Mn), % 1.6 to 1.9
0 to 1.0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030