MakeItFrom.com
Menu (ESC)

SAE-AISI 1045 Steel vs. AISI 309 Stainless Steel

Both SAE-AISI 1045 steel and AISI 309 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 1045 steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 13 to 18
34 to 47
Fatigue Strength, MPa 220 to 370
250 to 280
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
78
Shear Strength, MPa 380 to 410
420 to 470
Tensile Strength: Ultimate (UTS), MPa 620 to 680
600 to 710
Tensile Strength: Yield (Proof), MPa 330 to 580
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
980
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
16
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.6
Embodied Energy, MJ/kg 18
51
Embodied Water, L/kg 46
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 93
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 900
170 to 310
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 24
21 to 25
Strength to Weight: Bending, points 21 to 22
20 to 23
Thermal Diffusivity, mm2/s 14
4.3
Thermal Shock Resistance, points 20 to 22
14 to 16

Alloy Composition

Carbon (C), % 0.43 to 0.5
0 to 0.2
Chromium (Cr), % 0
22 to 24
Iron (Fe), % 98.5 to 99
58 to 66
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
12 to 15
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030

Comparable Variants