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SAE-AISI 1345 Steel vs. AISI 309S Stainless Steel

Both SAE-AISI 1345 steel and AISI 309S stainless steel are iron alloys. They have 63% 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 1345 steel and the bottom bar is AISI 309S stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 23
42
Fatigue Strength, MPa 230 to 390
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
78
Shear Strength, MPa 370 to 440
400
Tensile Strength: Ultimate (UTS), MPa 590 to 730
580
Tensile Strength: Yield (Proof), MPa 330 to 620
230

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
1080
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.6
Embodied Energy, MJ/kg 19
51
Embodied Water, L/kg 48
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 78 to 120
190
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 1040
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 26
21
Strength to Weight: Bending, points 20 to 23
20
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 19 to 23
13

Alloy Composition

Carbon (C), % 0.43 to 0.48
0 to 0.080
Chromium (Cr), % 0
22 to 24
Iron (Fe), % 97.2 to 97.8
58.1 to 66
Manganese (Mn), % 1.6 to 1.9
0 to 2.0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0.15 to 0.35
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030